Vol. XI, PP. 241-270 
December 17. 1897 
PROCEEDINGS 
OF THE 
BIOLOGICAL SOCIETY OF WASHINGTON 
A LIST OF THE GENERIC AND FAMILY 
NAMES OF RODENTS 
BY 
T. S. PALMER 
WASHINGTON, D. C. 
PUBLISHKD BY THK BIOLOGICAL SOCTBTY OF WASHINGTON Vol. XI, pp. 241-270 
December 17, 1897 
PROCEEDINGS 
OF THE 
BIOLOGICAL SOCIETY OF WASHINGTON 
A LIST OF THE GENERIC AND FAMILY NAMES OF 
RODENTS. 
BY T. S. PALMER. 
Generic names of mammals have undergone many changes in 
recent years, and in no group is this more apparent than in the 
Rodentia. Not only have new names been proposed for a host 
of new forms, but many well-known genera now appear under 
names long forgotten, but revived in obedience to the law of 
priority. Linnaeus, in 1758, recognized only six genera of ro- 
dents (including Rhinoceros/); Agassiz,in 1842-’46,recorded about 
220 generic names in this order, and Marschall, in 1873, added 
65 more, making a total of somewhat less than 300. The present 
list contains more than 600 (a large proportion of which are, of 
course, synonyms), comprising perhaps 15 percent of the entire 
number of generic and subgeneric names ever proposed for 
mammals. 
Recent changes in the nomenclature of the Rodentia are well 
exemplified in two important papers which have appeared dur- 
ing the past few months—one, by Mr. Oldfield Thomas, entitled 
‘On the Genera of Rodents’;1 the other, by Dr. E. L. Troues- 
sart, comprising part of the second edition of his ‘ Catalogus 
Mammalium.’ The former paper gives merely a list of the groups 
of living rodents which the author considers worthy of generic 
rank, together with references to the original description of each 
genus. Trouessart’s Catalogue, more ambitious in its scope, is 
1 Proc. Zool. Soc. London, 1896, pp. 1012-1028. 
56— Biot,. Soc. Wash., Vol. XI, 1897 242 
Palmer—Generic and Family Names of Rodents. 
intended to include all the species, living and extinct, now recog- 
nized. Even with these aids the student will often find difficulty 
in looking up synonymy or determining the earliest name of a 
genus, for Thomas gives only about one-third of the names, while 
Trouessart does not pretend to include all the generic synonyms 
and frequently omits references. 
The present paper differs from either of those just mentioned. 
It is neither an index nor a catalogue of recognized genera, but 
merely an attemjDt to bring together all the names, generic and 
subgeneric, ever proposed. It is not complete in itself, inasmuch 
as it gives neither references to descriptions nor localities ; but 
the authority, date of publication, and type or included species 
under each name will throw some light on these points. In ar- 
ranging this list everything has been subordinated to convenience 
of reference. Genera and subgenera have been treated alike and 
distributed under families, while the alphabetical arrangement has 
been followed both in the sequence of higher groups and in the 
names under each family. Some difficulty has been experienced 
in properly grouping the genera, and about a dozen names have 
not been referred to any family for lack of sufficient information 
regarding their status. Thomas’ classification of recent genera 
has been followed, except in the case of Lophiomyidx, which is 
given full family rank, instead of being placed as a subfamily 
under Muridx. To these 22 groups have been added 5 additional 
families of extinct rodents recognized by Zittel,1 making a total 
of 27 families. More than 200 names occur under Muridx, and 
for simplicity they have been placed under subfamilies, but this 
i3 the only instance in which the alphabetical arrangement of 
the family has not been followed.2 
The date is always the year of actual ‘publication, often very 
different from the date of apparent publication. For example, 
the description of Schizodon was published in the Proceedings of 
the Zoological Society of London for 1841, but it did not actually 
appear until March, 1842. Arctomys was described in a part of 
the fourth volume of Schreber’s Siiugthiere, issued in 1782, but 
the name was first published on plates accompanying this work, 
which are known to have been distributed in 1780. Schizodon 
1 ‘ Handbuch der Palieontologie,’ IV, 1892-’93. 
21 am indebted to Mr. Thomas for looking over the genera of Muridx 
and Octodontidx and for several suggestions as to the arrangement of the 
list. Generic and Family Names of Rodents. 
243 
is therefore quoted as 1842 and Ardomys as 1780.1 Preoccupied 
names have been marked, and cross-references made to those 
proposed to replace them. A few names have become almost 
unrecognizable by reason of the changes they have undergone 
in the process of emendation. Among such may be mentioned 
the correction of Aplodontia to Haploodus, Pithecheir to Pithe- 
cochirus, and Coelogenus to Genysccelus.2 The original spelling is 
always given, but no attempt has been made to include all 
variations, although the more important have been noted. If 
the first letter of a word has been changed, both forms have 
been inserted in the list, but other changes have been indicated 
in foot-notes. 
Each genus is followed by the type or species on which it was 
based. When no type was designated and none has been indi- 
cated by a subsequent reviser, all the species are mentioned in 
the order given in the original description. No doubt some 
errors will be detected here, for at first an attempt was made to 
determine the types for as many genera as possible. This plan 
was subsequently abandoned in favor of an enumeration of all 
the species originally mentioned, but some cases of elimination 
may have escaped correction. 
More or less lack of uniformity exists in the nomenclature of 
certain families, as, for example, in the cases of the American 
Porcupines and Chinchillas. Thomas, considering the New 
World Porcupines worthy of separation, erected the family Ere- 
thizontidee, and Trouessart, a few months later, recognized the 
same group, but renamed it Coendidse. No less than three family 
designations for the Chinchillas are in common use—Chinchil- 
lidse, Eriomyidse, and Lag ostomy idse. Such a condition of things 
is obviously unnecessary, and can only lead to confusion. As 
1 While this paper was in press, my attention was called to Sherborn’s 
announcement of the discovery of Lacepede’s well-known ‘ Tableau 
Methodique’ (usually quoted 1801), in the Didot edition of Buffon’s 
Histoire Naturelle, Quad., vol. XIY, 1799 (Nat. Sci., XI, p. 432, Dec., 
1897). Lacepede’s genera Agouti, Arvicola, Coendou, Hamster, Pika, and 
Talpoides therefore date from 1799, instead of 1801, but the necessary 
corrections could only be inserted in the cases of Pika and Talpoides. 
2 In explanation of this remarkable emendation the author says: “ Le 
u grec ne repondant pas l’u latin, le nom de Cuvier [Coelogenus] n’est 
pas acceptable, puisqu, il renferme une faute d’orthographie; et, pour 
faire un nom d’apparence reellement latine, il aurait au xnoins fallu 
ecrire Genysccelus et non Coelogenus.” Liais, Climats du Bresil, 1872, j>. 537, 244 
Palmer—Generic and Family Names of Rodents. 
an aid in selecting the proper name in such cases and to help in 
determining questions of priority, it has seemed best to give 
under each group all the family and subfamily names based 
on genera belonging to it. Full references have also been in- 
serted, inasmuch as authors seldom indicate the place where 
such names were first published. Groups first described as full 
families and afterwards reduced to subfamilies have merely a 
reference to the original description, but those first introduced 
as subfamilies and afterwards raised to family rank have refer- 
ences to both places of publication. This part of the list has 
been limited strictly to names ending in ‘ idee ’ or ‘ insej the only 
exception being old designations with the closely related termina- 
tion ‘ inad Here, as elsewhere, the object has been merely to bring 
together under each family all the available names, without at- 
tempting to discriminate between synonyms and names which 
have a claim to recognition.1 
This list is supplementary to a complete alphabetical index of 
the genera of mammals, containing full references to descriptions 
and localities, which is now almost ready for the press. The data 
relating to the Rodentia are here grouped under families and 
published in condensed form for the purpose of inviting sug- 
gestions and criticisms as to arrangement, type species, and 
grouping of genera. The list is therefore merely an experiment. 
Although the names have been brought together, much remains 
to be done in working out the synonymy of types, but such work 
properly belongs to the specialist and the reviser of groups. 
When this has been done some examples of duplication of names 
will probably be found even more striking than the case of the 
lemmings, in which a single species (Mas torquatus Pallas) has 
served as the basis for five or six nominal genera. 
As a help in distinguishing the names, extinct genera are 
printed in italics; an asterisk (*) indicates that the original 
description has not been seen; a dagger (f) that the name is 
preoccupied, and a double dagger (J) prefixed to a family or 
subfamily that the name is not available, either because the 
genus on which it was based is preoccupied or because it is 
antedated by some other valid name. 
1 Forsyth Major has recently proposed Nesomyivx for certain Old World 
mice usually classed under Cricetinse; hut as he does not give the limits 
of this group Thomas’ classification is necessarily followed, although 
Nesomyinx may be entitled to subfamily rank as much as the group under 
which it is placed, Generic and Family Names of Rodents. 
245 
ANOMALURIDAE. 
Anomalurina Gervais, in D’Orbigny’s Diet. Univ. d’Hist. Nat., XI, 
p. 203, 1849. 
Anomaluridae Gill, Arrangement Fam. Mamm., p. 21, Nov., 1872. 
Name, authority, and date. Type'or included species. 
Anomalurus Waterhouse, 1843. Anomalurus fraseri. 
Aroaethrus Waterhouse, 1843.. Suggested to replace Anomalurus, in 
case latter is preoccupied. 
Idiurus Matschie, 1894 Idiurus zenkeri. 
Haploodontidae Lilljeborg, Syst. Ofversigt Gnag. Diiggdjuren, pp. 9, 
41, 1866. 
Aplodontiidae Thomas, Proc. Zool. Soc. London, 1896, p. 1015 (1897). 
Aplodontia1 Richardson, 1829... Aplodontia leporina (=Anisonyx rufa 
Raf.) 
APLODONTIID7E. 
BATHYERGIDJG. 
Bathyergina Gervais, in D’Orbigny’s Diet. Univ. d’Hist. Nat., XI, 
p. 203, 1849. 
Bathyergidae Bonaparte, Conspectus Syst. Mastozoologiae, 1850. 
Georhychinae Gill, Arrangement Fam. Mamm., p. 20, Nov., 1872. 
| Orycterideae Lesson, Nouv. Tableau Regne Animal, Mamm., p. 120,1842. 
Name, authority, and date. Type or included species. 
Bathyergus Illiger, 1811 Mus maritimus. 
Ccetomys Gray, 1864 Bathyergus csecutiens, B. damarensis. 
Cryptomys Gray. 1864 Georychus holoserieeus. 
* Fossor Forster (?) 
Georychus2 Illiger, 1811 Mus capensis (type), M. talpinus, M. 
aspalax. 
-j- Heliophobius Peters, 1846 Heliophobius argenteo-cinereus. 
Heterocephalus Riippell, 1842. Heterocephalus glaber. 
Myoscalops Thomas, 1890.... New name for Heliophobius Peters. 
Orycterus Cuvier, 1829 Mus maritimus. 
Typhloryctes Fitzinger, 1867.. Georychus ochraceo-cinereus, Bathy- 
ergus caecutiens. 
Amended to Haplodon (Wagler, 1830), Aploudontia, Apludontia, 
Apluodontia, Haploodon, Haploudon, Hapludon, Haploudontia, Haplo- 
dus, Haploodus, Haploudus, and Hapludus. (See Coues, Century Diet., 
III, p. 2712.) 
2 Emended to Georhychus (Wagner, 1843). 
57—Biol. Soc. Wash., Vol. XI, 1897 246 
Palmer—Generic and Family Names of Rodents. 
CASTORIDiE. 
Castoridae Gray, London Medical Repository, XV, p. 302, April 1, 1821. 
Mylagaulidx Cope, Bull. U. S. Geol. & Geog. Surv. Terr., VI, No. 2, p. 362, 
Sept. 19, 1881. 
Name, authority, and date. Type or included species. 
* Aulacodon Kaup, 1832 Aulacodon typus. 
Castor Linnaeus, 1758 Castor fiber (type), C. moschatus. 
* Castoromys Pomel, 1854. Chalicomys sigmodus. 
Chalicomys Kaup, 1832 Chalicomys jaegeri. 
Chelodus Kaup, 1832 Chelodus typus. 
t Chloromys[ Meyer) Schlosser, 1884 Chalicomys eseri. 
Conodontes Laugel, 1862 Conodontes boisvilletli. 
f Conodus Gervais, 1867-’69 Emended form of Conodontes. 
Diabroticus Pomel, 1848 Diabroticus schmerlingii. 
Eucastor Leidy, 1858 Castor tortus. 
Mylagaulus Cope, 1878 Mylagaulus sesquipedalis. 
Palseocastor Leidy, 1869 Steneofiber nebrascensis. 
Palaeomys Kaup, 1832 Palaeomys castoroides. 
Sigmogomphius J. C. Merriam, 1896. Sigmogomphius lecontei. 
Steneofiber Geoffroy, 1834 
Steneotherium Geoffroy, 1833 
Trogontherium G. Fischer, 1809.. Trogontherium cuvieri, T. werneri. 
CASTOROIDIDAG. 
Castoroididx J. A. Allen, Mon. N. Am. Rodentia, p. 419, Aug., 1877. 
Name, authority, and date. Type or included species. 
Amblyrhiza Cope, 1868 Amblyrhiza inundata. 
Castoroides Foster, 1838 Castoroides ohioensis. 
t Leptomylus Cope, 1869 Misprint for Loxomylus. 
Loxomylus Cope, 1869.. Loxomylus longidens. 
Caviadae Gray, London Medical Repository, XV, p. 304, April 1, 1821. 
Hydrocharina Gray, Thomson’s Ann. Philos., XXVI, p. 341, Nov., 1825. 
Hydrochoeridae Gill, Arrangement Fam. Mammals, p. 22, Nov., 1872. 
Kerodontina Gervais, in D’Orbigny’s Diet. Univ. d’Hist. Nat., XI, 
p. 204, 1849. 
CAVIIDiE. 
Name, authority, and date. Type or included species. 
Anchymis Ameghino, 1886 Cardiodon leidyi. 
Anoema F. Cuvier, 1809 Cavia cobaya. 
? Callodontomys Ameghino, 1889.. Callodontomys vastatus. 
Capiguara Liais, 1872 New name for Hvdrochoerus. (Con- 
sidered preferable by Liais because 
derived from the Indian name.) Generic and Family Names of Rodents. 
247 
Cardiatherium Ameghino, 1883.. Cardiatherium deeringi. 
f Cardiodon Ameghino, 1885 Cardiodon marshii, C. leidyi. (See Eu- 
cardiodon.) 
* Ccirdiodus Bravard, 1857 Cardiodus waterhousii, C. medius, C. 
minus, C. dubius. 
Cardiomys Ameghino, 1885 Cctrdiomys cavinus. 
Cavia Pallas, 1766 Cavia cobaya. 
Caviodon Ameghino, 1885 Caviodon multiplicatus. 
f Ceratodon IVagler, 1830 Emended form for Kerodon. 
Cerodon Wagler, 1830... Emended form for Kerodon. 
Cobaya Cuvier, 1817 Cavia cobaya. 
Controcavia Burmeister, 1885.... Controcavia matercula. 
Dioccirtherium Ameghino, 1888.. Diocartherium australe. 
Dolichotis Desmarest, 1819 ... Cavia pataclionica. 
Eucardiodon Ameghino, 1891... New name for Cardiodon. 
Galea Meyen, 1833 Galea musteloides. 
Hydrochaerus Brisson, 1762... Sus hydrochoeris. 
Kerodon F. Cuvier, 1823 The ‘ Moco ’ of Geoffroy. 
Mara D’Orbigny, 1829 Dolichotis patagonica. 
Microcavia Gervais & Ameghino, Microcavia typus, M. robusta, M. inter- 
1880. media, M. dubia. 
Neoprocavia Ameghino, 1889.... New name for Procavia Ameghino. 
Oromys Leidy, 1853 Oromys sesopi. 
Orthomyctera Ameghino, 1889... Cavia rigens, Orthomyctera vaga, Doli- 
chotis lacunosa, Orthomyctera lata. 
Palseocavia Ameghino, 1889 Cavia impar, C. avita, Palseocavia pam- 
paea, P. minuta. 
Phugatherium Ameghino, 1887 .. Phugatherium cataclisticum. 
Plexochcerus Ameghino, 1886.... Hydrochaerus paranensis. 
Prea Liais, 1872 New name for Cavia. (Preferred by 
Liais because native name.) 
Procardiatherium Ameghino, 1885 Procardiatherium simplicidens. 
t Procavia Ameghino, 1885 Procavia mesopotamica. (See Neopro- 
cavia.) 
Scavia Blumenbach, 1802 Modified form of Cavia. 
Strata Ameghino, 1886 Strata elevata. 
CHINCHILLIDiE. 
Chinchi llidae Bennett, Proc. Zool. Soc. London, 1833, p. 58. 
t Eriomyidae Burmeisteb, Syst. Uebersicht Thiere Brasil., I, p. 188, 1854. 
t Lagostomidae “Bonaparte, Synopsis Vert. Syst., 1837.” 
Viscachideae Lesson, Nouv. Tableau Regne Animal, Mamin., p. 104, 
1842. 
Name, authority, and date. Type or included species. 
Briaromys Ameghino, 1889 Briaromys trouessartianus. 
Callomys D’Orbigny & Geoffrey, Callomys viscacia, Mus laniger, Cal- 
1830. lomys aureus. 248 
Palmer—Generic arid Family Names of Rodents. 
Chinchilla Bennett, 1829 Mus laniger. 
Colpostemma Ameghino, 1891.... Colpostemma sinuata. 
t Epiblema Ameghino, 1886 Epiblemahorridala. (See Neoepiblemn.) 
.Eriomys Lichtenstein, 1829.... Eriomys chinchilla. 
Euphilus Ameghino, 1889 Euphilus ambrosettianus, E. Jcurtzii. 
Gyriabrus Ameghino, 1891 Gyriabrus glutinatus. 
Lagidium Meyen, 1833 ...... Lagidium peruanum. 
Lagostomus Brookes, 1829.... Lagostomus trichodactylus. 
f Lagotis Bennett, 1833 Lagotis cuvieri. 
Megamys D’Orb. & Laurillard, 1842. Megamys patagonensis. 
Neoepiblema Ameghino, 1889.... New name for Epiblema Ameghino. 
Perimys Ameghino, 1887 Perimys erutus, P. onustus. 
Pliolagostomus Ameghino, 1887.. Pliolagostomus notatus. 
Potamarchus Burmeister, 1885... Potamarchus murinus. 
Prolagostomus Ameghino, 1887.. Prolagostomus pusillus, P. divisus, P. 
profluens, P. imperialist. 
Scotaeumys Ameghino, 1887 Scotaeumys imminutus. 
Sphseramys Ameghino, 1887 Sphseramys irruptus. 
Sphiggomys Ameghino, 1887.... Sphiggomys zonatus. 
Sphodromyst Ameghino, 1887.... Sphodromys scalaris. 
Strophostephanos Ameghino, 1891. Strophostephanos iheringii. 
Tetrastylus Ameghino, 1886 Megamys? laevigatus. 
Vizcacia1 Schinz, 1824 (?) Yizcacia pamparum. 
DASYPROCTIDiE. 
Agoutidae Gray, London Medical Repository, XY, p. 304, April 1,1821. 
| Chloromina Gervais, in D’Orbigny’s Diet. Univ. d’Hist. Nat.. XI, 
p. 204, 1849. 
t Coelogenina Gervais, in D’Orbigny’s Diet. Univ. d’Hist. Nat., XI; 
p. 204, 1849. 
% Ccelogenyidee Burmeister, Syst. Uebers. Tbiere Brasil., I, p. 227,1854. 
Dasyporcina Gray, Thomson’s Ann. Philos., XXVI, p. 341, Nov., 1825. 
Dasyproctina Gray, List Spec. Mamm. Brit. Mus., pp. xxv, 124, 1843. 
Dasyproctidae Bonaparte, Conspectus Syst. Mastozoologise, 1850. 
Name, authority, and date. Type or included species. 
Agouti Lacepede, 1801 .*. Agouti paca (= Mus paca Linnseus). 
Cloromis F. Cuvier, 1812 Includes the agoutis. 
Ccelogenus 2 F. Cuvier, 1807... Ccelogenus subniger, C. fulvus. 
Cutia Liais, 1872 New name for Dasyprocta Illiger. 
Dasyprocta Illiger, 1811 Cavia aguti, C. acuschy. 
Genysccelus Liais, 1872 Emended form for Ccelogenus. 
Osteopera Harlan, 1825.... ... Osteopera platycepliala. 
Paca Fischer, 1814 Paca maculata (= Cavia paca). 
Platypyga Illiger, 1811 (?) 
1 Viscacia Rafinesque, 1815 (nomen nudum), Rengger, 1830. 
2Cgelogenus (Griffith, 1827); Caelogenys (Agassiz, 1846); Coelogenys 
(Illiger, 1811); Genyscoelus (Liais, 1872). Generic and Family Names of Rodents. 
249 
DINOMYIDA!. 
Dinomyidae Alston, Proc. Zool. Soc. London, 1876, p. 96. 
Dinomys Peters, 1873 Dinomys branickii. 
DIPODIDiE.1 
Dipodina Bonaparte, “Synopsis Vert. Syst., 1837.” 
Dipodidae Waterhouse, Ann. & Mag. Nat. Hist., X, p. 203, Nov., 1842. 
Dipodae Gervais, in D’Orbignv’s Diet. Univ. d’Hist. Nat., XI, p. 203, 
1849. 
Dipsidae Gray, London Medical Repository, XV, p. 303, April 1, 1821. 
J Qerboidae Waterhouse, Charles worth’s Mag. Nat. Hist., Ill, p. 186, 
April, 1839. 
f Ierboidae Gray, Thomson’s Am. Philos., XXVI, p. 341, Nov., 1825. 
t Jaculina Carus, Handbuch Zool., p. 101, 1868. 
J Jaculidae Gill, Arrangement Fam. Mamm., p. 20, Nov., 1872. 
Sminthinaa Alston, Proc. Zool. Soc. London, 1876, p. 80. 
Sminthidae Schulze, Schrift. Nat. Ver. Harz., Wernigerode, V,p. 24,1890. 
Zapodidae Coues, Bull. U. S. Geol. & Geog. Surv. Terr., I, 2dser., No. 
5, p. 253, 1875. 
Name, authority, and date. Type or included species. 
Allactaga Cuvier, 1836 Dipus allactaga. 
Beloprymnus Gloger, 1841.... New name for Allactaga. 
Cuniculus Brisson, 1762....... Dipus allactaga. 
Dipus Schreber, 1782 Dipusjaculus, D. sagitta, D. cafer, D. 
meridianus, D. tamaricinus. 
Euchoreutes W.L.Sclater,1891. Euchoreutes naso. 
t Halticus Brandt, 1844 Dipus halticus. 
Haltomys Brandt, 1844 Dipus aegyptius, D. hirtipes, D. mac- 
rotarsus, D. mauritanicus. 
Jaculus Erxleben, 1777 Jaculus orientalis, J. giganteus, J. tor- 
ridarum. 
f Meriones Cuvier, 1825 Dipus americanus. 
Platycercomys Brandt, 1844. . Dipus platyurus. 
Pygeretmus Gloger, 1841 Dipus platyurus. 
Scarturus Gloger, 1841 4-toed species of Dipus. 
Scirteta Brandt, 1844 (?) 
Scirtetes Wagner, 1841 New name for Allactaga Cuvier. 
Scirtomys Brandt, 1844 Alactaga tetradactylus (= Scarturus 
Gloger, 1841). 
Scirtopoda Brandt, 1844 Dipus halticus, D. aegyptius, D. hirti- 
pes, D. macrotarsus, D. mauritan- 
icus (— Halticus Haltomys). 
represents the subfamily Sminthinse, Zapus the Zapodinge, 
and the other genera belong to the Dipodinse. 250 
Palmer—Generic and Family Names of Rodents. 
Sminthus Keys. & Blasius,1840. Sminthus nordmanni. 
Yerbua Forster, 1778 Yerbua tarsata (=Tarsius spectrum), 
Y. sibirica, Y. capensis (=Pedetes 
cafer), Mus meridianus, Yerbua 
kanguru (= Macropus giganteus); 
Mus longipes,M. jaculus, M. sagitta. 
Zapus Coues, 1875 Dipus hudsonius. 
EOCARDIDA1. 
Eocardidse Ameghino, Re vista Argentina, I, Ent. 3, p. 145, Junio, 1891. 
Name, authority, and date. Type or included species. 
Dicardia Ameghino, 1891. Dicardia maxima, D. modica, D. exca- 
vata. 
Eocardia Ameghino, 1887 Eocardia monlana. 
Hedymys Ameghino, 1887 Hedymys integrus. 
Phanomys Ameghino, 1887 Phanomys mixtus. 
Procardia Ameghino, 1891 Eocardia eliptica. 
Schistomys Ameghino, 1887 Schistomys erro. 
Tricardia Ameghino, 1891 Eocardia divisa. 
ERETHIZONTIDiE. 
X Cercolabina Gray, List Spec. Mamm. Brit. Mus., pp. xxiv, 123, 1843. 
J Cercolabinae Gill, Arrangement Fam. Mamm., p. 22, Nov., 1872. 
X Cercolabidae Ameghino, Enum. Sist. Mam. Fos. Patagonia Austral, 
p. 9, Die. 1887. 
Chaetomyinae Thomas, Proc. Zool. Soc. London, 1896, 1026 (1897). 
Coendidae Trouessart, Cat. Mamm. tarn viv. quam foss., fasc. Ill, 
p. 619, Oct., 1897. 
Erethizontina Bonaparte, Conspectus Syst. Mastozoologise, 1850. 
Erethizontidae Thomas, Proc. Zool. Soc. London, 1896,1025 (Apr., 1897). 
f Sphingurinae Alston, Proc. Zool. Soc. London, 1876, p. 93. 
t Synetherina Gervais, in D’Orbigny’s Diet. Univ. d’Hist. Nat., XI, 
p. 204, 1849. 
J Synetherinae Trouessart, Cat. Mamm. Yiv. et Foss., Rongeurs, p. 182, 
1881. 
Name, authority, and date. Type or included species. 
Acaremys Ameghino, 1887 Acaremys murinus, A. minutus, A. mi- 
nutissimus. 
Cercolabes Brandt, 1835 NewnameforCoendouLacepede,1801. 
Chaetomys Gray, 1843 Hystrix subspinosus. 
Coendou1 Lacepede, 1801 Hystrix preliensilis. 
Echinoprocta Gray, 1805 Erethizon rufescens. 
Echinothrix Brookes, 1828. .. Hystrix dorsata. 
1 Emended to Coendous (Temminck, 1820) ; Coendus (Illiger, 1815); 
Coendus (Rafinesque, 1815); Cuandu (Liais, 1872), Generic and Family Names of Rodents. 
251 
Erethizon1 F. Cuvier, 1822 Hystrix dorsata. 
Hystricops Leidy, 1858 Hystrix venustus. 
Onychura Brookes, 1828 Onychura spinosa. 
Plectrochoerus Pictet, 1843.... Plectrochcerus moricandi. 
Scictmys Ameghino, 1887 Sciamys principalis, S. varians. 
Sincetherus2 F. Cuvier, 1822... Hystrix prehensilis. 
Sphiggurus3 F. Cuvier, 1822. .. Sphiggurus spinosus, 
Steiromys Ameghino, 1887 Steiromys detentus, S. duplicatus. 
GEOMYIDAE. 
Geomyina Bonaparte, Conspectus Syst. Mastozoologue, 1850. 
Geomyinae Baird, Mamm. N. Am., pp. xxx, 366, 1857. 
Geomyidae Gill, Arrangement Fam. Mamm., p. 21, Nov., 1872. 
J Pseudotomina Gray, Thomson’s Ann. Philos., XXVI, p. 342, 1825. 
| Pseudostomidae Gervais, Ann. Sci. Nat., Paris, 3eser., XX, p. 245,1853. 
Name, authority, and date. Type or included species. 
Ascomys Lichtenstein, 1825... Ascomys canadensis (= Mus bursa - 
rius). 
Cratogeomys Merriam, 1895... Geomys merriami. 
Diplostoma Rafinesque, 1817.. Diplostoma fusca (= Mus bursarius). 
Geomys Rafinesque, 1817 Geomys pinetis (=Mus tuza Ord). 
Gymnoptychus Cope, 1873 Gymnoptychus chrysodon, G. nasutus* G. 
trilophus, and G. minutus. 
Heliscomys Cope, 1873 Heliscomys vetus. 
Heterogeomys Merriam, 1895. Geomys hispidus. 
Macrogeomys Merriam, 1895.. Geomys heterodus. 
Orthogeomys Merriam, 1895... Geomys scalops. 
Oryctomys Eydoux & Gervais, Five subgenera: Diplostoma, Sacco- 
1836. phorus, Saccomys, Poephagomys, 
Ctenomys. 
Pappogeomys Merriam, 1895.. Geomys bulleri. 
Platygeomys Merriam, 1895... Geomys gymnurus. 
Pseudostoma Say, 1823 Pseudostoma bursaria. 
Saccophorus Kuhl, 1820 Mus bursarius. 
Thomomys Maximilian, 1839.. Thomomys rufescens. 
*?Tucanus Rafinesque, 1815 Nomen nudum? 
Zygogeomys Merriam, 1895... Zygogeomys tricbopus. 
1 Emended to Erethison (Waterhouse, 1839); Eretison (McMurtrie,1831); 
Eretizon (Cuvier, 1825); Erythizon (Alston, 1876). 
2 Emended to Sinetheres (Agassiz, 1842); Sincetherus (Cuvier, 1825); 
Synsetheres (Gervais, 1859); Synetheres (G. Cuvier, 1829) ; Syncetheres 
(Lund, 1839). 
3 Emended to Sphingurus (Waterhouse, 1848); Spiggurus (Gray, 1847) • 
Spigurus (Swainson, 1835). 252 
Palmer—Generic and Family Names of Rodents. 
GLIRIDiE.1 
Gliridae Thomas, Proc. Zool. Soc. London, 1896, 1016 (1897). 
J Myosidas Gray, London Medical Repository, XV, p. 303, April 1,1821- 
J Myoxidae Waterhouse, Charles worth’s Mag. Nat. Hist., Ill, p. 184, 
April, 1839. 
Platacanthomyinae Alston, Proc. Zool. Soc. London, 1876, p. 81. 
Name, authority, and date. Type or included species. 
Bifa Lataste, 1885. Bifa lerotina. 
Bracliymys Meyer, 1847. New name for Micromys Meyer, 1846. 
Cxnomys (Bravard MS.) Lydek- Cxnomys typus (= Myoxus murinus). 
ker, 1885. 
Claviglis Jentink, 1888. Claviglis crassicaudatus. 
Eliomys Wagner, 1843. Myoxus melanurus. 
Glis Brisson, 1762. Sciurus glis. 
Graphiurus F. Cuvier, 1838. Graphiurus capensis. 
Micromys Meyer, 1846. Micromys ornatus. (See Brachymys.) 
Muscardinus Kaup, 1829. Myoxus muscardinus. 
Myoxus Schreber, 1782. Myoxus glis, M. dryas, M. nitela, M. 
muscardinus. 
Platacanthomys Blyth, 1859. Platacanthomys lasiurus. 
Typhlomys Milne Edwards, 1877. Typhlomys cinereus. 
HETEROMYIDiE. 
Dipodomyna Gervais, Ann. Sci. Nat., Paris, 3emeser., XX, p. 245, 1853. 
Dipodomyinae Coues, Proc. Acad. Nat. Sci. Phila., 1875, p. 277. 
Heteromyina Gray, Proc. Zool. Soc. London, 1868, p. 201. 
Heteromyinae Alston, Proc. Zool. Soc. London, 1876, p. 88. 
Heteromyidae Allen, Bull. Am. Mus. Nat. Hist. N.Y., V, p. 233, Sept. 
21, 1893. 
Perognathidinae Coues, Proc. Acad. Nat. Sci. Pliila., 1875, pp. 277-278. 
J Saccomyna Gray, List. Spec. Mamm. Brit. Mus., pp. xxiv, 120, 1843. 
i Saccomyidae Baird, Mamm. N. Am., pp. xxx, 365, 1857. 
Name, authority, and date. Type or included species. 
Abromys Gray, 1868 ... Abromys lordi. 
Chaetodipus Merriam, 1889.... Perognathus spinatus. 
Cricetodipus Peale, 1848 Cricetodipus parvus. 
Dasynotus Wagler, 1830 Mus anomalus. 
Dipodomys Gray, 1841 Dipodomys phillipii 
Dipodops Merriam, 1890 Dipodomys agilis. 
? Entoptychus Cope, 1878 Entoptychus cavifrons, E. planifrons, 
E. crassircimis. 
Heteromys Desmarest, 1817... Mus anomalus. 
Macrocolus Wagner, 1844 Macrocolus halticus. 
1 Platacanthomys and Typhlomys belong to the Platacanthomyime, the 
others to the Glirinse. Generic and Family Names of Rodents. 
253 
Microdipodops Merriam, 1891. Microdipodops megacephalus. 
Otognosis Coues, 1875 Otognosis longimembris. 
Perodipus Fitzinger, 1867 Dipodomys agilis. 
Perognathus Maximilian, 1839. Perognathus fasciatus. 
Pleurolicus Cope, 1878 Pleurolicus sulcifrons. 
Saccomys F. Cuvier, 1823 Saecomys anthophilus. 
HYSTRICIDAE. 
Histricidae Gray, London Med. Repository, XY, p. 304, April 1, 1821. 
Hystrixideae Lesson, Nouv. Tableau Regne Animal, Mamin., p. 96, 1842. 
Name, authority, and date. Type or included species. 
Acantherium Gray, 1847 Acanthion javanieum, A. flemingii. 
Acanthion Cuvier, 1822 Acanthion javanieum. 
Acanthochoerus Gray, 1866... Acanthochoerus bartlettii, A. grotei. 
Atherurus F. Cuvier, 1829 Hystrix fasciculata. 
* Eucritus G. Fischer, 1817 (?) 
Hystricotherium Croizet, 1853 ... Hystrix refossa. 
Hystrix Linnaeus, 1758 Hystrix cristata, H. prehensilis, H. 
dorsata, H. macroura, H. brachyura. 
Lamprodon Wagner, 1848 Lamprodonprimigenius. 
CEdocephalus Gray, 1866 Acanthion cuvieri. 
* Oreomys Aymard, 1854 Oreomys claveris. 
Trichys Gunther, 1876 Trichys lipura. 
ISCHYROMYIDA1. 
Ischyromyidse Alston, Proc. Zool. Soc. London, 1876, pp. 67, 78. 
Name, authority, and date. Type or included species. 
Colonomys Marsh, 1872 Colonomys celer. 
Colotaxis Cope, 1873 Colotaxis cristatus. 
Ischyromys Leidy, 1856 Ischyromys typus. 
? Mysops Leidy, 1871 Mysops minimus. 
Paramys Leidy, Nov. 28, 1871.. Paramys delicatus, P. delicatior, P. deli- 
catissimus. 
Pseudoiomus Cope, 1872 Pseudotomus Juans. 
Sciuravus Marsh, June 21, 1871. Sciuravus nitidus, S. undans. 
? Sciuromys Schlosser, 1884. .. ... Sciuromys cayluxi. 
Syllophodus Cope, 1881 New name for Mysops Leidy, 1871 
(erroneously said to be preoccupied). 
Taxymys Marsh, 1872 Taxymys lucaris. 
Tillomys Marsh, 1872 Tillomys senex, T. parvus. 
LEPORIDiE 
Lagidae Schulze, Helios, XIY, p. 82, 1897. 
Leporidae Gray, London Medical Repository, XV, p. 304, April 1, 1821. 
Lepusidae Gervais, Ann. Sci. Nat., 3me ser., XX, p. 240, 1853. 
58—Biol. Soc. Wash., Vol. XI, 1897 254 
Palmer—Generic and Family Names of Rodents. 
Name, authority, and date. Type or included species. 
Caprolagus Blyth, 1845 Lepus lnspidus. 
Chionobates Kaup, 1829 Lepus variabilis, L. borealis. 
f Cuniculus Gloger, 1841 Lepus cuniculus. 
Eulagos Gray, 1867 Lepus mediterraneus, L. judaeae. 
f Hydrolagus Gray, 1867. Lepus aquaticus (type), L. palustris. 
(See Limnolagus). 
Lagopsis Rafinesque, 1815 Nomen nudum. 
* Lagos Brookes, 1828 Lepus arcticus. 
Lag other ium Croizet, 1853 Lepus issiodorensis, L. neschersensis. 
Lepus Linnaeus, 1758 Lepus timidus, L. cuniculus, L. capen- 
sis, L. brasiliensis. 
Limnolagus Mearns, 1897 New name for Hydrolagus Gray, 1867. 
Macrotolagus Mearns, 1895... Lepus alleni. 
Microlagus Trouessart, 1897... Lepus cinerascens. 
Oryctolagus Lilljeborg, 1873... Lepus cuniculus. 
Palaeolagus Leidy, 1856 Palaeolagus haydeni. 
Punolax Cope, 1874 Panolax sanctsefidei. 
Praotherium Cope, 1871 Praotherium palatinum. 
Romerolagus Merriam, 1896... Romerolagus nelsoni. 
Sylvilagus Gray, 1867 Lepus nanus (= L. americanus), L. ar- 
temisia (= L. nuttalli), L. bachmani. 
Tapeti Gray, 1867 Lepus brasiliensis. 
Tritium Cope, 1873 Tritium avunculus, T. leporinum, T. 
paniense. 
LOPHIOMYIDAI 
Lophiomyidae Gill, Arrangement Fam. Mamm., p. 20, Nov., 1872. 
Lophiomys Milne Edwards, Feb. 6, 1867. Lophiomys imhausii. 
Phractomys Peters, Feb., 1867 Phractomys aetliiopicus. 
MURIDiE. 
Cricetina Gray, Thomson’s Ann. Philos., XXVI, p. 342, Nov., 1825. 
Cricetinee Alston, Proc. Zool. Soc. London, 187ti, p. 82. 
Cricetidae Zittel, Handbuch d. Palaeontologie, IV, 2te Lief., p. 534,1893. 
Hesperomyidae Ameghino, Mam. Fos., in Actas Acad. Nac. Ciencias, 
Cordoba, VI, p. 109, 1889. 
Nesomyinae Forsyth Major, Proc. Zool. Soc. London, 1897, p. 718. 
Sigmodontinae Thomas, Proc. Zool. Soc. London, 1896,1019 (1897). 
CRICETIN/C. 
Name, authority, and date. Type or included species. 
Abrothrix Waterhouse, 1837... Mus (Abrothrix) longipilis. 
Acromys (‘ Wagner’) Trouessart, 1881. Synonym of Drymomys. 
Akodon Meyen, 1833 Akodon boliviense. 
Baiomys True, 1894. Hesperomys taylori. Generic and Family Names of Rodents. 
255 
Blarinomys Thomas, 1896 Oxymycterus breviceps. 
Brachytarsomys Gunther, 1875 Brachytarsomys albicauda. 
Brachyuromys Forsyth Major, 1896. Brachyuromys ramirohitra. 
f Calomys Waterhouse, 1837 Mus (Calomys) bisulcatus. 
Chilomys Thomas, 1897 Oryzomys instans. 
Oricetodon Lartet, 1851 Cricetodon sansaniensis, C. medium, C. 
minus. 
Cricetulus Edwards, 1867 Cricetulus griseus. 
Cricetus Zimmermann, 1777... Le Hamster. 
Decticus Aymard, 1853 ... Decticus antiquus. 
Deilemys Saussure, 1860 Hesperomys toltecus. 
Drymomys Tschudi, ]844..... Drymomys parvulus. 
Eligmodontia1 F. Cuvier, 1837. Eligmodontia typus. 
Eliurus Edwards 1885 Eliurus myoxinus. 
? Eomys Sclilosser, 1884 Eomys zitteli. 
Eumys Leidy, 1856.. Eumys elegcms. 
Euneomys Coues, 1874 Reithrodon chinchilloides. 
Gymnuromys Forsyth Major, 1896 Gymnuromys roberti. 
Habrothrix Wagner, 1843 Emended form for Abrothrix. 
Hallomys Jentink, 1879 Hallomys audeberti. 
Hamster 1801 Hamster nigricans. 
Heligmodontia Agassiz, 1846.. Emended form for Eligmodontia. 
Hesperomys Waterhouse, 1839. Mus bimaculatus. 
Holochilomys (‘Brandt’) Pe- Mus aquaticus, M. squamipes (modi- 
ters, 1861. tied form of Holochilus). 
Holochilus Brandt, 1835 Mus (Holochilus) leucogaster, M. an- 
guya. 
Hypogeomys Grandidier, 1869. Hypogeomys antimena. 
Ichthyomys Thomas, 1893 Iclithyomys stolzmanni. 
* Lithomys Meyer, 1846 Lithomys parvulus. 
Megalomys Trouessart, 1881... Mus pilorides. 
Micromys Aymard, 1848 Micromys minulus. (See Myotherium.) 
* Myarion Pomel, 1854 Myarion antiquum, M. muscidoides, M. 
minutum, M. angustidens. 
Myotherium Aymard, 1853 New name for Micromys Aymard, 1848. 
Myoxomys Tomes, 1861 Hesperomys (Myoxomys) salvinii. 
Mystromys Wagner, 1841 Mystromys albipes. 
Necromys Ameghino, 1889 Necromys conifer. 
Nectomys Peters, 1861 Mus squamipes, Neetomys apicalis. 
t Neomys Gray, 1873 Neomys panamensis. 
Neotomys Thomas, 1894 Neotomys ebriosus. 
Nesomys Peters, 1870 Nesomys rufus. 
Notiomys Thomas, 1890 Hesperomys (Notiomys) edwardsii. 
Nyctomys Saussure, 1860 Hesperomys sumichrasti. 
Ochetodon Coues, 1874 Mus humilis. 
1 Emended to Eligmodon (Thomas, 1896), Elimodon (Fitzinger, 1867), and 
Heligmodontia (Agassiz, 1846). 256 
Palmer—Generic and Family Names of Rodents. 
Onychomys Baird, 1857 Hypudseus leucogaster. 
* ?Orycteromys Pictet, 1842 (?) 
Oryzomys Baird, 1857 Mus palustris. 
Oxymycterus Waterhouse, 1837 Mus (Oxymycterus) nasutus. 
* Pelamys Jourdan, 1867 (?) Pelamys remifer. 
Peromyscus Gloger, 1841 Peromyscus arboreus (=Cricetus my- 
oides). 
Phyllotis Waterhouse, 1837 Mus (Phyllotis) darwini. 
Reithrodon1 Waterhouse, 1837. Reithrodon typicus, R. cuniculo'ides. 
Reithrodontomys Giglioli, 1873 Reithrodon from North America. 
Rhipidomys Tschudi, 1844 Hesperomys leucodactylus. 
Scapteromys Waterhouse, 1837 Mus (Scapteromys) tumidus. 
Sigmodon Say & Ord, 1825.... Sigmodon hispidum. 
Sigmodontomys J. A. Allen, 1897. Sigmodontomys alfari. 
Sitomys Fitzinger, 1867 Cricetus myoides. 
Thomasomys Coues, 1884 Hesperomys cinereus. 
Trinodontomys Rhoads, 1894. Sitomys insolatus. 
Tylomys Peters, 1866 Hesperomys (Tylomys) nudicaudus. 
Vesperimus Coues, 1874 Hesperomys (Vesperimus) leucopus. 
Vesperomys (‘ Coues ’) Alston, 1880. Modified form of Vesperimus. 
Zygodontomys J. A. Allen, 1897 Oryzomys cherriei. 
DENDROMYIN/E. 
Dendromyinae Alston, Proe. Zool. Soc. London, 1876, p. 82. 
Deomyinee Lydekker, in Flower & Lydekker’s Mamm., Living & Ex- 
tinct, p. 473, 1891. 
Name, authority, and date. Type or included species. 
Dendromus A. Smith, 1829 Dendromus typus. 
Deomys Thomas, 1888 Deomys ferrugineus. 
Leimacomys2 Matschie, 1893.. Leimacomys biittneri. 
Malacothrix Wagner, 1843.... New name for Otomys Smith, 1834. 
f Otomys Smith, 1834 Otomys typicus, O. albicaudatus. 
Steatomys Peters, 1846 Steatomys pratensis. 
GERBILLIN/E. 
Gerbillina Gray, Thomson’s Ann. Philos., XXVI, p. 342, Nov., 1825. 
Gerbillidae De Kay, Nat. Hist. New York, Zool., pt. I, pp. xv, 70, 1842, 
Name, authority, and date. Type or included species. 
Amphiaulacomys Lataste, 1882. Rhombomys pallidus. 
Dipodillus Lataste, 1881 Gerbillus simoni. 
Endecapleura Lataste, 1882... Gerbillus garamantis. 
Gerbillus Desmarest, 1804 Gerbillus tegyptius, G. canadensis, 
G. pyramidum. 
Hendecapleura Thomas, 1883.. Emended form for Endecapleura. 
1 Emended to Rhithrodon (Lydekker, 1891), Rithrodon (Agassiz, 1846) 
2 Emended to Limacomys (Lydekker, 1894). Generic and Family Names of Rodents. 
257 
Meriones Illiger, 1811 Dipus tamaricinus, D. meridianus. 
Pachyuromys Lataste, 1880... Pacliyuromys duprasi. 
Psammomys Cretzsclimar, 1828. Psammomvs obesus. 
Rhombomys Wagner, 1841.... Rhombomys pallidus. 
Tatera Lataste, 1882 Gerbillus indicus. 
HYDROMYIN/C- 
Hydromyina Gray, Thomson’s Ann. Philos., XXVI, p. 341, Nov., 1825. 
Hydromyinae Alston, Proc. Zool- Soc. London, 1876, p. 80. 
Hydromysideae Lesson, Nouv. Tabl. Regne Animal, Mamm., p. 125,1842. 
Name, authority, and date. Type or included species. 
Chrotomys Thomas, 1895. .. . Chrotomys whiteheadi. 
Hydromys Geoffrey, 1805 Mus coypus, Hydromys chrysogaster, 
H. leucogaster. 
Xeromys Thomas, 1889 Xeromys myoides. 
MICROTIN/E. 
J Arvicolidae Gray, London Med. Repository, XY, p. 303, April 1.1821. 
| Ellobiinae 1 Gill, Arrangement Fam. Mamm., p. 20, Nov., 1872. 
Lemnina Gray, Thomson’s Ann. Philos., XXVI, p. 342, Nov., 1825. 
Microtinae Rhoads, Am. Nat., XXIX, p. 940, Oct., 1895. 
Miller, N. Am. Fauna, No. 12, p. 8, July, 1896. 
J Ondatrina Gray, Thomson’s Ann. Philos., XXYI, p. 341, Nov., 1825. 
Name, authority, and date. Type or included species. 
Agricola Blasius, 1857 Arvicola agrestis. 
Alticola Blanford, 1881 Arvicola stoliczkanus. 
Alviceola Blainville, 1817 ‘ Le genre campagnol.’ (Misprint for 
Arvicola?) 
Ammomys Bonaparte, 1831. .. New name for Psammomvs Le Conte. 
Anaptogonia Cope, 1871 . Arvicola hiatidens. 
Anteliomys Miller, 1896 Microtus chinensis. 
Arvicola Lacepede, 1801 Mus amphibius (= M.terrestris Linn.) 
Aulacomys Rhoads, 1894 . ... Aulacomys arvicoloides. 
Bicunedens Hodgson, 1863 Bicunedens perfuscus (nomen nudum 
= Neodon sikimensis). 
Borioikon Poliakoff, 1881 Mvodes torquatus. 
Brachyurus Fischer, 1813 Mus arvalis, M. rutilus, M. amphibius, 
M. lemmus, M. torquatus, M. allia- 
rius, Brachyurus blumenbachii, B. 
fulvus, B. niloticus. 
Bra,mus Pomel, 1892 Bramus barbarus. 
t Campicola Schulze, 1890 Arvicola arvalis, A. subterraneus, A. 
campestris. 
Chilotus Baird, 1857 Arvicola Oregoni. 
1 Preoccupied by Ellobiinse, a subfamily of Mollusks. See Adams, Gen. 
Recent Moll., II, p. 237, 1858. 258 
Palmer—Generic and Family Names of Rodents. 
* Chthonoergus Nordmann, 1839. Mas nmrinus (= M. talpinus Pallas). 
fCuniculus Wagler, 1830 Mus lemmus, M. torquatus (type), M. 
aspalax. (See Borioikon, Dicrosto- 
nyx, Misothermus, Tylonyx.) 
Dicrostonyx Gloger, 1841 Mus hudsonius? 
t Ellobius Fischer, 1814 Mus talpinus (type), Ellobius zocor 
(=Mus aspalax), Mus capensis, M. 
hudsonius. 
Eothenomys Miller, 1896 Microtus melanogaster. 
Eremiomys Poliakoff, 1881 ... Georychus luteus, Muslagurus (type). 
Evotomys Coues, 1874 Mus rutilus. 
Fiber Cuvier, 1800 Castor zibetliicus. 
*|Glareolus Oken, 1816 Mus arvalis, M. eampestris? 
Hemiotomys S61ys-Long- Arvicola fulvus (= A. arvalis), A. am- 
champs, 1836. phibius (=A. terrestris). 
Hyperacrius Miller, 1896 Microtus fertilis. 
Hypudaeus Illiger, 1811 Mus lemmus, M. amphibius (= M. ter- 
restris), M. arvalis. 
Isodelta Cope, 1871 Arvicola speothen. 
Lagurus Gloger, 1841 Lagurus migratorius (= Mus lagurus 
Pall. ?) 
Lasiopodomys Lataste, 1887.. Arvicola brandti. 
Lemmomys Lesson, 1842 Mus talpinus. 
* Lemmus Link, 1795 Mus socialis, M. lagurus, M. lemmus 
(type), M. torquatus, M. glareolus, 
M. hudsonius. 
Microtus Schrank, 1798 Mus terrestris (=M. arvalis Pall., 
type), M. amphibius (=M. terres- 
tris Linn.), M. gregarius (=M. ar- 
valis Pall. ?) 
f Micrurus Forsyth Major, 1876. Arvicola nebrodensis. 
Mictomys True, 1894 Mictomys innuitus. 
Misothermus Hensel, 1855 Myodes torquatus. 
Mussascus Oken, 1816 Ondatra americana (= Castor zibethi- 
cus). 
Mynomes1 Raflnesque, 1817... Mynomes pratensis (= Arvicola penn- 
sylvanicus). 
[Myocastor Kerr, 1792 Mus Myocaster coypus (type), Mus M. 
zibetliicus. (See Octodontidse.)] 
Myodes Pallas, 1811 Mus lemmus, M. torquatus, M. lagu- 
rus, M. oeeonomus, M. arvalis, M. 
saxatilis, M. gregalis, M. socialis, 
M. alliarius, M. rutilus. 
* Myolemmus Pomel, 1854 Myolemmus ambiguus. 
Neodon Hodgson, 1849 Neodon sikimensis. 
Neofiber True, 1884 Neofiber alleni. 
1 Emended to Myonomes (Coues, 1874). Generic and Family Names of Rodents. 
259 
Ochetomys Fitzinger, 1867.... Mus amphibius, Hypudseus pertinax, 
Arvicola destructor, Mus terrestris, 
Hypudseus nageri, Arvicola monti- 
cola, A. americanus. 
* Ondatra Link, 1795 Ondatra coypus, O. zibethicus. 
f Paludicola Blasius, 1857 Arvicola amphibius (= A. terrestris), 
A. nivalis, A. ratticeps. 
Pedomys Baird, 1857 Arvicola austerus. 
* Phaiomys Blyth, 1863 Pliaiomys leucurus (= Microtus blythi 
Blan.) 
Phenacomys Merriam, 1889... Phenacomys intermedius. 
Pinemys Lesson, 1836 Psammomys pinetorum. 
Pitymys McMurtrie, 1831 New name for Psammomys Le Conte. 
fPraticola Fatio, 1867 Arvicola amphibius (=A. terrestris), 
A. nivalis, A. arvalis, A. ratticeps, 
A. campestris. 
f Psammomys Le Conte,1830.... Psammomys pinetorum. (See Am- 
momys, Pinemys, Pitymys.) 
* Simotes Fischer, 1829 (?) (?) 
f Sylvicola Fatio, 1867 Arvicola agrestis. 
Synaptomys Baird, 1857 Synaptomys cooperi. 
t Terricola Fatio, 1867 Arvicola subterraneus, A. savii. 
Tetramerodon Rhoads, 1894... Arvicola tetramerus. 
Tylonyx Schulze, 1897 Mus torquatus. 
Muridse Gray, London Medical Repository, XV, p. 303, April 1, 1821. 
Musideee Lesson, Nouv. Tableau Regne Animal, Mamin., p. 134, 1842. 
MURIN/E. 
Name, authority, and date. Type or included species. 
Acanthomys Lesson, 1842.... Mus setifer, M. alexandrinus, Acan- 
thomys perchal, Mus platythrix, M. 
hispidus. 
f Acanthomys Gray, 1867 Acanthomys leucopus. 
Acomys Geoffroy, 1838 Mus cahirinus. 
Acosminthus Gloger, 1841.... Mus cahirinus, M. dimidiatus. 
Apodemus Kaup, 1829 Mus agrarius. 
Arvicanthis Lesson, 1842 Lemmus niloticus. 
Bandicota Gray, 1873 Bandicota gigantea. 
Batomys Thomas, 1895 Batomys grantii. 
Carpomys Thomas, 1895 Carpomys melanurus. 
Chiropodomys Peters, 1868... Chiropodomys penicillatus. 
Chiruromys Thomas, 1888 Chiruromys forbesi. 
Conilurus Ogilby, 1838 Conilurus destructor. 
Crateromys Thomas, 1895 Phloeomys schadenbergi. 
Craurothrix Thomas, 1895 New name for Echiothrix Gray, 1867. 
Cricetomys Waterhouse, 1840. Cricetomys gambianus. 
Dasymys Peters, 1875 Dasymys gueinzii. 260 
Palmer—Generic and Family Names of Rodents. 
fEchiothrix1 Gray, 1867 Echiothrixleucura. (See Craurothrix.) 
? Elomys Aymard, 1848 Elomys priscas. 
Epimys Trouessart, 1881 ‘ Gymnomys et Acanthomys p. Gray, 
1867 ’ (57 species, including Mus 
caraco, decumanus, rattus, etc.)- 
Euchaetomys Fitzinger, 1867.. Muspalmarum, M. novane, M. setifer, 
M. perchal, M. kok, M. hardwickii, 
M. rufescens, M. ellioti, M. lepidus, 
M. vittatus, M. pumilio, M. pardu- 
leus, M. zebra, Rattus donovani. 
Golunda Gray, 1837 Golunda ellioti, G. meltada, Mus bar- 
bara. 
Gymnomys Gray, 1867 Mus (Gymnomys) celebensis. 
Hapalomys Blyth, 1859 Hapalomys longicaudatus. 
f Hapalotis Lichtenstein, 1829... Hapalotis albipes. 
Heliomys Gray, 1873 Heliomys jeudei. 
Isomys Sundevall, 1842 Mus variegatus (=Lemmus niloticus). 
f Lasiomys Peters, 1866. Lasiomys afer. (See Lophuromys.) 
Leggada Gray, 1837 Leggada booduga, Mus platytlirix. 
Lemniscomys Trouessart, 1881. Mus barbarus, pulchellus, zebra, line- 
atus, lineato-affinis, pumilio, trivir- 
gatus, dorsalis, univittatus. 
t Lophiomys Deperet, 1890 Lophiomys pyrenaicus. (See Trilopho- 
mys). 
Lophuromys Peters, 1874 New name for Lasiomys Peters, 1866. 
Malacomys Edwards, 1877 Malacomys longipes. 
Mastacomys Thomas, 1882.... Mastacomys fuscus. 
Micromys Dehne, 1841 .. Micromys agilis. 
Murinus Rafinesque, 1815 Nomen nudum. 
Mus Linnseus, 1758 Mus porcellus, M. leporinus, M. lem- 
mus, M. marmota, M. monax, M. 
cricetus, M. terrestris, M. amphib- 
ius, M. rattus, M. musculus, M. avel- 
lanarius, M. sylvaticus, M. striatus, 
M. longipes, M. jaculus, M. volans. 
Musculus Rafinesque, 1814.... Musculus frugivorus, M. dichrurus. 
(Modified form, proposed to super- 
cede Mus). 
Nannomys Peters, 1876 Mus (Nannomys) setulosus. 
Nesokia Gray, 1842 Mus hardwickii. 
Notomys Lesson, 1842 Dipus mitchellii. 
Pelomys Peters, 1852 Mus (Pelomys) fallax. 
Pithecheir2 Cuvier, 1838 Pithecheir melanurus. 
Pogonomys Edwards, 1877.... Mus (Pogonomys) macrourus. 
1 Ecliinothrix Alston, 1876. 
2 Emended to Pitcheir (Schinz, 1845), Pithechir (Jentink, 1892), Pith- 
ecliirus (Agassiz, 1842), and Pithecochirus (Gloger, 1841). Generic and Family Names of Rodents. 
261 
Pseudoconomys Rhoads, 1896. Mus (Pseudoconomys) proconodon. 
Pseudomys Gray, 1832 Pseudomys australis. 
Rattus Zimmermann, 1777 Rattus somnolentus, R. migrans. 
f Saccostomus Peters, 1846 Saccostomus campestris. 
Spalacomys Peters, 1861 Spalacomys indicus. 
? Tenomys Rafinesque, 1815.... Nomen nudum. 
Trilophomys Deperet, 1892 New name for LophiomysBeperet, 1890. 
Uromys Peters, 1867 Mus macropus. 
Vandeleuria Gray, 1842 Mus oleraceus. 
NEOTOM'N/E. 
Neotominas Merriam, Proc. Acad. Nat. Sci. Phila., pp. 228, Sept. 24,1894. 
Name, authority, and date. Type or included species. 
? Bothriomys Ameghino, 1889 Bothriomys catenatus. 
Hodomys Merriam, 1894 Neotoma alleni. 
Nelsonia Merriam, 1897 (See page 277.) 
Neotoma Say & Ord, 1825 Mus floridanus. 
? Padculus Cope, 1879 Paciculus insolitus. 
Ptyssophorus Ameghino, 1889... Ptyssophorus elegans. 
Teonoma Gray, 1843. Neotoma drummondii (= Myoxus 
drummondii). 
Trelomys Ameghino, 1889 Tretomys atavus. 
Xenomys Merriam, 1892 Xenomys nelsoni. 
Otomyinae Thomas, Proc. Zool. Soc. London, 1896, p. 1017 (1897). 
Name, authority, and date. Type or included species. 
? Euryotis Brants, 1827 Mus irroratus. 
Oreinomys Trouessart, 1881... New name for Oreomys Heuglin, 1877, 
-f Oreomys Heuglin, 1877 Oreomys typus. 
Otomys F. Cuvier, 1823 Two species,afterwards named Otomys 
unisulcatus (Sept., 1829), and O. bi- 
sulcatus (Oct., 1829). 
OTOMYIN/E. 
Phloeomyinae Alston, Proc. Zool. Soc. London, 1876, p. 81 
Phlceomys Waterhouse, 1839.. Phloeomys cumingi. 
PHLCEOMYIN/E. 
RHYNCHOMYIN/E. 
Rhynchomyinee Thomas, Proc. Zool. Soc. London, 1896, p. 1017 (1897). 
Rhynchomys Thomas, 1895... Rhynchomys soricoides. 
Siphneinae Gill, Arrangement Fain. Mammals, Nov., 1872, p. 20. 
SIPHNEIN/E. 
59—Biol. Soc. Wash., Voi,. XI, 1897 262 
Palmer—Generic and Family Names of Rodents. 
Name, authority, and date. Type or included species. 
Myospalax Blyth, 1846 Georychus fuscocapillus. 
Myotalpa Kerr, 1792 Mus talpinus, M. capensis, M. mari- 
timus, M. aspalax, Myotalpa typhia. 
Siphneus Brants, 1827 Mus aspalax. 
OCHOTONIDAE. 
t Lagidae Schulze, Helios, XIV, p. 82, 1897. 
t Lagomina Gray, Thomson’s Ann. Philos., XXVI, p. 341, Nov., 1825. 
t Lagomyidae Lii.ljeborg, Syst. Ofvers. Gnag. Diiggdjuren, pp. 9,58,1866. 
Ochotonidae Thomas, Proc. Zool. Soc. London, 1896, p. 1026 (1897). 
Name, authority, and date. Type or included species. 
Abra Gray, 1863 Lagomys curzonise. 
* A mphilagas Pomel, 1854 Amphilagus antiquus. 
* Lagodus Pomel, 1854 Lagodus picoides. 
f Lagomys G. Cuvier, 1800 Le pika (Lepus alpinus). 
Lagopsis Schlosser, 1884 Lagomys oeningensis, L. verus. 
* Marunsiomys1 Croizet, 1853 (?) 
Myolagus Hensel, 1856 Lagomys sardus. 
Ochotona Link, 1795 Lepus pusillus, L.alpinus, L.ocliotona. 
* Pika Lacepede, 1799 Lepus alpinus. 
* Platyodon Bravard, 1853 No men nudum. 
* Prolagus Pomel, 1854 Lagomys sansaniensis. 
Titanomys Meyer, 1843 Titanomys visenoviensis. 
OCTODONTIDiE.2 
% Aulacodina Bonaparte, Conspectus Syst. Mastozoologise, 1850. 
Capromyna Gervais, D’Orbigny’s Diet. Univ. d’Hist. Nat., XI, p. 204, 
1849. 
1 Emended (?) to Marcuinomys (Croizet, 1859). 
2 Considerable diversity of opinion exists as to the subdivisions of the 
Octodonts. Some authors arrange the genera in 3, and others in 4 groups. 
Capromyinae: Adelphomys, Aulaoodus, Capromys, Discolomys, Eumy- 
sops, Graphimys, Guillinomys, Gyrignophus, Isodon, Lomomys, Mastonotus, 
Morenia, Myocastor,Myopotamus, Mysateles,Neoreomys, Olenopsis, Ondatra, 
Orthomys, Paranomys, Plagiodontia, Potamys, Pseudomoreomys, Scleromys, 
Spaniomys, Stichomys, Triaulacodus, Tribodon (?), and Thryonomys. 
Ctenodactylinae : Ctenodactylus, Massoutiera, Pectinator, Pellegrina, 
Petromus, and Ruscinomys (?). 
Echimyinae : Carterodon, Cercomys, Dactylomys, Echimys, Isbthrix, 
Kannabateomys, Lasiomys, Lasiuromys, Loncheres, Lonchophorus, Me- 
somys, Nelomys Jourdan, Nelomys Lund, Pliyllomys, Platythrix, Poeci- 
lomys, Thrichomys, and Thrinacodus. 
Octodontinae: Abrocoma, Aconaemys, Actenomys, Ctenomys, Den- 
drobius, Dicodophorus, Dicolpomys, Octodon, Phtoramys, Pithanotomys, 
Platxomys, Pcephagomys, Psammoryctes, Schizodon, and Spalacopus. Generic and Family Names of Rodents. 
263 
Capromysideae Lesson, Nouv. Tabl. Regne Animal, Mamm., p. 124,1842. 
Capromyidae Burmeister, Syst. Uebersicht Thiere Brasil., I, pp. 187, 
189, 1854. 
Ctenodactylina Gervais, Ann. Sci. Nat., 3me ser., XX, p. 245, 1853. 
Ctenodactylinae Gill, Arrangement Fam. Mamm., p. 22, Nov., 1872. 
Ctenodactylidae Zittel, Handb. der Palseont., IV, 2teLief.,p. 542, 1893. 
Ctenomysideae Lesson, Nouv Tabl. Regne Animal, Mamm., p. 105,1842. 
Echymyna Gray, Thomson’s Ann. Philos., XXVI, p. 341, Nov., 1825. 
Echymyidae Bonaparte, Conspectus Syst. Mastozoologite, 1850. 
Echinomyidae Ameghino, Mam. Fos. Repub. Argentina, in Actas Acad. 
Nac. Ciencias, Cordoba, VI, p. 131, 1889. 
Loncheridae Burmeister, Syst.Uebers. Thiere Brasil., I, pp. 188,192,1854. 
J Muriformidae Ameghino, Enum. Sist. Especies Mam. Fos. Patagonia, 
p. 10, Die., 1887. 
Myiopotamina Bonaparte, Conspectus Syst. Mastozoologite, 1850. 
Octodontidae Waterhouse, Proc. Zool. Soc. London, 1839, p. 172. 
J Psammoryctina Wagner, Wiegmann’s Archiv f. Naturgesch., 1841, I. 
} Fsammoryctidae Burmeister, Syst. Uebersicht Thiere Brasil., I, pp. 188, 
212, 1854. 
Spalacopodidae Lilljeborg, Syst. Ofversigt Gnag. Diiggdjuren, pp. 9, 
44, 1866. (Spalacopodoi'des Brandt, 1855.) 
Name, authority, and date. Type or included species. 
Abrocoma Waterhouse, 1837.. Abrocoma bennettii, A. cuvieri. 
Aconaemys Ameghino, 1891... New name for Schizodon Waterhouse. 
Actenomys Burmeister, 1888 Actenomys cuniculinus. 
Adelphomys Ameghino, 1887.... Adelphomys candidus. 
J Aulacodus Temminck, 1827... Aulacodus swinderianus. (See Thry- 
onomys, Triaulaeodus.) 
Cannabateomys Lydekker, 1892. Emended form for Kannabateomys. 
Capromys Desmarest, 1822 Capromys fournieri. 
Carterodon Waterhouse, 1848.. Echimys sulcidens. 
Cercomys Cuvier, 1829 Cercomys cunicularius. 
Ctenodactylus Gray, 1830 Ctenodactylus massonii. 
Ctenomys Blainville, 1826 Ctenomys brasiliensis. 
Dactylomys I. Geolfroy, 1838.. Dactylomys typus. 
Dendrobius Meyen, 1833 Dendrobius degus. 
Diccelophorus Ameghino, 1888.. Diccelophorus latidens, D. simplex, I) 
celsus, Ctenomys priscus. 
Dicolpomys Winge, 1887 Dicolpomys fossor. 
Discolomys Ameghino, 1889 Discolomys cuneus. 
Echimys 1 Cuvier, 1809 Echimys cristatus, E. spinosus. 
Eumysops Ameghino, 1888 Eumysops plicatus, E. Ixviplicatus, E. 
robustus. 
Graphimys Ameghino, 1891 Graphimys provectus. 
Guillinomys Lesson, 1842 Guillinomys chilensis. 
1 Emended to Echinomys (Wagner, 1840), Enchomys (Gloger, 1841). 264 
Palmer—Generic and Family Names of Rodents. 
Gundi (‘Fischer’) Lataste, 1881 A common name for Ctenodactylus, 
erroneously credited to Fischer as 
a genus. 
Gyrignophus Ameghino, 1891 ... Gyrignophus complicatus. 
Habrocoma Wagner, 1842 Emended form for Abrocoma. 
Houtia Agassiz, 1842 Nomen nudum. Native name for 
Capromys, included by Agassiz in 
list of genera, without reference or 
mention of species. 
f Isodon Say, 1822 Isodon pilorides. 
Isothrix Wagner, 1845 Isothrix bistriata, I. pachyura, I. pa- 
gurus. 
Kannabateomys Jentink, 1891 Dactylomys amblyonyx. 
Lasiomys Burmeister, 1854 Lasiomys hirsutus. 
Lasiuromys Deville, 1852 Lasiuromys villosus. 
Lomomys Ameghino, 1891 Lomomys evexus. 
Loncheres1 Illiger, 1811 Loncheres paleacea, Hystrix chrysuros. 
Lonchophorus Lund, 1839. ..*.... Lonchophorus fossilis. 
MaBsoutiera Lataste, 1885 Ctenodactylus mzabi. 
Mastonotus Wesmael, 1841.... Mastonotus popelairi (=Mus coypus.) 
Mesomys Wagner, 1845 Mesomys ecaudatus. 
Morenia Ameghino, 1886 Morenia elephantina. 
Myocastor Kerr, 1792 Mus (Myocastor) coypus (type), Mus 
(M.) zibethicus. 
Myopotamus Geoffroy, 1805... Myopotamus bonariensis. 
Mysateles Lesson, 1842 Mysateles poeppingii (= Capromys 
prehensilis). 
Nelomys Jourdan, 1837 Echimys cristatus. 
f Nelomys Lund, 1841 Echimys antricola, E. sulcidens. (See 
Thrichomys.) 
Neoreomys Amegliino, 1887 Neoreomys australis, N. indivisus, N. 
decisus. 
Octodon Bennett, 1832 Octodon cumingii. 
Olenopsis Ameghino, 1889 Olenopsis uncinus. 
* Ondatra Link, 1795 Mus coypus, Castor zibethicus. 
Orthomys Ameghino, 1881 Orthomys dentalus. 
Orycteromys(‘Blainville’)Agas- Used by Blainville in 1826, only in 
siz, 1842. the French form Orycterome,for the 
genus described as Ctenomys. (See 
Orycteromys, p. 256.) 
Paranomys (Scalabrini MS.) Ame- 
ghino, 1889. . Paranomys typicus. 
Fectinator Blyth, 1856 Pectinator spekei. 
Pellegrina Gregorio, 1886 Pellegrina panormensis. 
Petromus A. Smith, 1831 Petromus typicus. 
Phtoramys Ameghino, 1887..... Phtoramys homogenidens. 
Amended to Loncherites (London Encyclopoedia, 1845). Generic and Family Names of Rodents. 
265 
Fhyllomys Lund, 1839 Phyllomys brasiliensis (?) 
Pithanotomys Ameghino, 1887... Pithanotomys columnaris. 
Plagiodontia1 F. Cuvier, 1836. Plagiodontia aedium. 
* Plataeomys Ameghino, 1881 Plataeomys scindens. 
* Platythrix Pictet, 1842 (?) 
* Pcecilomys Pictet, 1842 (?) 
Pcephagomys F. Cuvier, 1834.. Pcephagoinvs ater. 
Potamys Larranhaga, 1823. Le quyiaof Azara (Myopotamus coypus). 
Psammoryctes Poeppig, 1835. . Psammoryctes noctivagus (= Spala- 
copus poeppigii). 
Pseudoneoreomys Ameghino, 1891 Pseudoneoreomys pachyrhynchus, P. lep- 
torhynchus, P. mesorhynchus. 
? Ruscinomys Deperet, 1890 Puscinomys europxus. 
t Schizodon Waterhouse, 1842.. Schizodon fuscus. (See Aconaemys.) 
Scleromys Ameghino, 1887 Scleromys angustus. 
Spalacopus Wagler, 1832 . .. Spalacopus poeppigii. 
Spaniomys Ameghino, 1887 Spaniomys riparius, S. modestus. 
Stichomys Ameghino, 1887 Stichomys regularis, S. constans. 
Thrichomys Trouessart, 1881.. Thrichomys antricola, T. inermis, T. 
brevicauda. 
Thrinacodus Gunther, 1879... Thrinacodus albicauda. 
Thryonomys Fitzinger, 1867... Aulacodus semipalmatus. 
Triaulacodus Lvdekker, 1896.. New name for Aulacodus Temminek, 
1827. (See Thryonomys.) 
Tribodon Ameghino, 1887 Tribodon clemens. 
PEDETIDiE. 
t Halamydae Gray, London Medical Repository, XV, p. 303, April 1,1821. 
Pedestina Gray, Thomson’s Ann. Philos., XXVI, p. 342, Nov., 1825. 
Pedetidae Gill, Arrangement Fam. Mamin., p. 20, Nov., 1872. 
Name, authority, and date. Type or included species. 
Helamys F. Cuvier, 1817 Mus cafer. 
Lagotis Blainville, 1817 ‘La grande gerboise du Cap.’ 
Pedetes Illiger, 1811 Dipus cafer. 
PSEUDOSCIURIDAE!. 
Pseudosciuridx Zittel, Handb. der Palseont., IV, 2te Lief., p. 523, 1893. 
Name, authority, and date. Type or included species. 
Adelomys Gervais, 1853 Theridomys vaillanti. (See Theridomyidx.) 
? Decticadapis Lemoine, 1883 Decticadapis sciuroides. 
Pseudosciurus Hensel, 1856 Pseudosciurus suevicus. 
Sciurodon Scblosser, 1884 Sciurodon cadurcense. 
Sciuroides Forsyth Major, 1873.. Sciurus rutimeyeri, Sciuroides fraasi, S. 
siderolithicus, S. minimus. 
1 Emended to Plagiodon (Alston, 1876). 266 
Palmer—Generic and Family Names of Rodents. 
SCIURIDiE. 
Allomyidse Marsh, Am. Journ. Sci., 3d ser., XIV, p. 253, Sept., 1877. 
Arctomydae Guay, London Med. Repository, XY, p. 303, April 1,1821. 
Aictomysideae Lesson, Nouv. Tabl. Regne Animal, Mamm., p.ll5,1842. 
X Campsiurina Brandt, fide Carus, Handb. Zool., p. 96, 1868-75. 
Leithiidx Lydhkker, Proc. Zool. Soc. London, 1895, p. 862 (1896). 
Nannosciurinae Forsyth Major, Proc. Zool. Soc. London, 1893, pp. 
187, 189. 
Pteromidae Anderson, Yunnan Exped., p. 278, 1879. 
Sciuridae Gray, London Medical Repository, XV, p. 301, April 1,1821. 
Name, authority, and date. Type or included species. 
Allomys Marsh, 1877 Allomys nitens. 
Ammospermophilus Merriam, 1892. Tamias leucurus. 
Amphisciurus (Bravard MS.) Ly- 
dekker, 1885 Amphisciurus typus. 
Anisonyx Rafinesque, 1817.... Anisonyx brachiura (= Arctomys co- 
lumbianus). 
Arctomys Scbreber, 1780 Arctomys marmota, A. monax, A. 
bobac, A. empetra, A. citillus. 
Atlantoxerus Forsyth Major, 1893. Xerus getulus. 
Baginia Gray, 1867 Sciurus platani. 
Calloseiurus Gray, 1867 Sciurus rafflesii. 
Callospermophilus Merriam, 1897. Sciurus lateralis. 
Citillus Lichtenstein, 1827-’34. Citillus mexicanus, C. leptodactylus, 
C. mugosaricus. 
Colobetis Brandt, 1844 Spermophilus fulvus. 
Cynomys Rafinesque, 1817 Cynomys socialis, C. grisea. 
EchinosciurusTrouessart,1880. Sciurus hypopyrrhus (type), S. varia- 
bilis, S. stramineus. 
Eosciurus Trouessart, 1880... Sciurus bicolor (type), S. giganteus, S. 
indicus, S. maximus, S. macrurus. 
Eoxerus Forsyth Major, 1893.. Xerus laticaudatus, X. berdmorei, X. 
tristriatus, X. palmarum, X. insig- 
nis, X. hosei. 
Erythrosciurus Gray, 1867 Sciurus ferrugineus, S. siamensis. 
Eupetaurus Thomas, 1888 Eupetaurus cinereus. 
Eutamias Trouessart, 1880 Tamias asiaticus (type), T. harrisi, T. 
lateralis, T. laevidens. 
Farunculus(‘Lesson’) Gray, 1867. Probably a misprint for Funambulus. 
Funambulus Lesson, 1832 Funambulus indicus. 
Funisciurus Trouessart, 1880.. Sciurus lemniscatus. 
Geosciurus A. Smith, 1834.... Sciurus ervthopus. 
Guerlinguetus Gray, 1821 Sciurus guerlinguetus. 
Heliosciurus Trouessart, 1880.. Sciurus annulatus. 
Heterosciurus Trouessart, 1880. Sciurus ferrugineus. Generic and Family Names of Rodents. 
267 
Ictidomys J. A. Allen, 1877... Spermophilus tereticaudus, S. mexi- 
canus, S. 13-lineatus (type), S. frank- 
lini. 
Lagomys Storr, 1780 “An unnatural and undefined com- 
bination of forms with squat bodies 
[including 24 species], but typified 
by species of Arctomys.”—Gill, 
f Laria Gray, 1867 Sciurus insignis. 
Leithia1 Lydekker, 1896 Myoxus melitensis. 
Lipura Illiger, 1811 Hyrax hudsonius. 
Macroxus Cuvier, 1823 Le guerlinguet et le toupaye. 
* Marmota Blutnenbach, 1779... Marmota alpina, M. cricetus, M. lem- 
mus, M. typhlus, M. capensis.2 
Meniscomys Cope, 1878 Meniscomys hippodus, M. multiplicatus. 
Microsciurus J. A. Allen, 1895. Sciurus (Microsciurus) alfari. 
Monax Warden, 1819 Monax missouriensis (= Cynomys lu- 
dovicianus). 
Nannosciurus Trouessart, 1880. Sciurus melanotis, S. exilis. 
Neosciurus Trouessart, 1880... Sciurus carolinensis (type), S. arizo- 
nensis, S. griseoflavus, S. aberti, S. 
fossor. 
Otocolobus Brandt, 1844 Synonym of Colobotis (?). 
Otospermophilus Brandt, 1844. Spermophilus beecheyi. 
Palseosciurus Pomel, 1854 Sciurus (Palseosciurus) feignouxii,S.(P.) 
chalaniati. 
Palmista Gray, 1867 Sciurus palmarum, S. penicillatus, S. 
layardii, S. sublineatus. 
Parasciurus Trouessart, 1880... Sciurus niger. 
Paraxerus Forsyth Major, 1893. Xerus cepapi, X. palliatus, X. pyrro- 
pus, X. congicus, X. lemniscatus, 
X. isabella, X. boehmi. 
Petaurista Link, 1795 Sciurus volucella, S. volans, S. hudso- 
nius, S. petaurista (type), S. sagitta. 
Plesiarctomys Bravard, 1848-’52. Plesiarctomys gervaisii. 
Plesispermophilus Filhol, 1883... Plesispermophilus angustidens. 
Protoxerus Forsyth Major,1893. Sciurus stangeri, S. ebii, S. aubinnii. 
Pteromys G. Cuvier, 1800 Sciurus volans, S. petaurista. 
Pterotix Rafinesque, 1815.. .. Nomen nudum. 
Ratufa Gray, 1867 Sciurus indicus. 
Rheithrosciurus3 Gray, 1867.. Sciurus macrotis. 
Rhinosciurus Gray, 1843 Rhinosciurus tupaioides. 
1 This genus is only provisionally referred to the Sciuridte. Lydekker 
has recently suggested a special family, Leithiidse, for it. 
2 From the 7th edition of the Handbueh d. Naturgeschichte, 1803. The 
first edition, 1779, not seen. 
3 Emended to Rhithrosciurus (Lydekker, 1891). 268 
Palmer—Generic and Family Names of Rodents. 
Rukaia Gray, 1867 Sciurus macrourus, S. bieolor, S. ephip- 
pium. 
Sciuropterus F. Cuvier, 1825.. Sciurus volans. 
Sciurus Linnaeus, 1758 Sciurus vulgaris, S. niger, S. cinereus, 
S. flavus, S. getulus, S. striatus, S. 
volans. 
Spermophilopsis Blasius, 1884. Spermophilus leptodactylus. 
Spermophilus F. Cuvier, 1825. Muscitillus. 
Spermosciurus Lesson, 1836... Includes 12 species, mostly from 
Africa. 
Stereodedes Cope, 1869 Stereodedes tortus. 
Tamias Illiger, 1811 Sciurus striatus. 
Tamiasciurus Trouessart, 1880. Sciurus liudsonicus. 
Tenotis Rafiuesque, 1817 Tenotis griseus (= Sciurus erithopus). 
Xerospermophilus Merriam, 1892. Spermophilus mohavensis. 
* Xerus Hemprich & Ehrenberg, Xerus brachyotus (and X. syria- 
1832. cus?). 
SPALACIDjE.1 
X Aspalacidae Gray, Thomson’s Ann. Philos., XXVI, p. 342, Nov., 1825. 
Aspalomyina Waterhouse, Ann. & Mag. Nat. Hist,, X, p. 203, 1842. 
Rhizomyinae Thomas, Proc. Zool. Soc. London, 1896, p. 1021 (1897). 
Spalacidae Gray, London Med. Repository, XV, p. 303, April 1, 1821. 
Name, authority, and date. Type or included species. 
Aspalax Desmarest, 1804 Mus typhlus. 
* Aspalomys Laxmann (?) 
Chrysomys Gray, 1843 Bathyergus splendens. 
Nyctocleptes Temminck, 1832. Nyctocleptes dekan (= Mus suma- 
trensis). 
Ommatostergus Nordmann, 1840. Ommatostergus pallasii. 
Rhizomys Gray, 1831 Rhizomys sinensis, R. sumatrensis. 
Spalax Giildenstiidt, 1770 Spalax microphthalmus (=S. typhlus 
Pall., 1778). 
Tachyoryctes Riippell, 1835... Bathyergus splendens. 
* Talpoides Lacepede, 1799 Mus typhlus. 
1 yphlodon Falconer, 1868 Nomen nudum (Rhizomys sivalensis 
Lydekker, 1878?) 
THERIDOMYIDJE. 
Theridomyidse Alston, Proc. Zool. Soc. London, 1876, pp. 70, 88. 
Trechomyinx Trouessart, Cat, Mamm. tam viv. quam foss, p. 392, 1897. 
1 Chrysomys, Nyctocleptes, Rhizomys, Tachyoryctes and Typhlodon 
belong to the Rhizomyinse; Aspalax, Aspalomys, Oinmatostergus, Tal- 
poides, and Spalax to the Spalacinse. Generic and Family Names of Rodents. 
269 
Name, authority, and date. Type or included species. 
Adelomys Gervais, 1853 Theridomys vaillanti. (See Pseudosciuridse.) 
Archseomys Laizer & Parieu, 1839. New name for Palseomys Laiz. & Par. 
Blainvillimys (Bravard MS.) Ger- 
vais, 1848-’52 Theridomys blainvillei. 
Cournomys (Croizet) Zittel, 1893. Synonym of Issidioromys. 
Cuvierimys Bravard, 1848-’52.... Cuvierimys laurillardi. 
Dipoides Jiiger, 1835 Species not named. 
Gergoviomys (Croizet MS.) Blain- 
ville, 1840 Species not named. 
* Jsoptychus Pomel, 1854 Theridomys (Isoptychus) jourdani, Jsop- 
tychus auberyi, I. antiquus, I. cuvieri, 
I. vassoni, Theridomys aquatilis (?). 
Issidioromys (Croizet MS.) Blain- 
ville, 1840 Issidioromys pseudansema G e rvais, 1848, 
f Neomys Bravard, 1844 Neomys lembronicus (= Theridomys 
lembronicus). 
Nesokerodon Scl\losser, 1884 Isiodoromys minor. 
* Omegodus Pomel, 1854 Omegodus echimybides. 
* 1‘ularuema Pomel, 1854 Palansema antiquus. 
t Palseomys Laizer & Parieu, 1839.. PaUeomys arvernensis. (See Archseomys.) 
* Perrieromys Croizet (?) 
Protechimys Schlosser, 1884 Protechimys gracilis, P. major. 
*\Txniodu$ Pomel, 1854 Echimys curvistriatus. 
Theridomys Jourdan, 1837 Species not named in first description. 
Trechomys Lartet, 1869 Trechomys bonduellii. 
INCERT31 SEDIS 
Anotis Rafinesque, 1815 Nomen nudum. 
Archilagus Ilteckel, 1895 Hypothetical genus—‘Atavus omnium 
Rodentiuin.’ 
Asteromys1 Ameghino, 1897 Asteromyspunctus, A. prospicuus. 
Budomys(‘Croizet’) Bravard, 1843 Nomen nudum. 
Cephalomys1 Ameghino, 1897.... Cephalomys arcidens, C. plexus. 
Hciplostropha Ameghino, 1891. .. Hciplostropha scalabriniana. 
Ilystriocomys Giebel, 1860 Ilystriocomys thuringiacus. 
? Mixodectes2 Cope, 1883 Mixodectes pungens, M. crassiculus. 
Orchiomys1 Ameghino, 1897 Orchiomys prostans. 
1 Cephalomyidse Ameghino, Bol. Inst. Geog. Argentine), XVIII, p. 592, 
Oct. 6, 1897. 
2 Mixodectidse Cope, Proc. Acad. Nat. Sci. Phila., p. 80, May 22, 1883. 
“The discovery of some skeleton fragments in good association with a 
lower jaw of Mixodeclus pungens makes it probable that this genus should 
be removed from the Primates and placed as an extremely primitive Ro- 
dent.”—Matthew, Bull. Am. Mus. Nat. Hist. New York, IX, p. 265,1897. 
60—Biol. Soc. Wash., Vol. XI, 1897. 270 
Palmer—Generic and Family Names of Rodents, 
Palaiotrogus Jtiger, 1839 ... Palaiotrogus steinheimensis. 
Paradoxomgs1 Ameghino, 1885.. Paradoxomys cancrivorus. 
Protechynus Filliol, 1891 Nomen nudum. 
Protoplychus2 Scott, 1895 Protoptychus hatcheri. 
1 Paradoxomyina Amegliino, Bol. Acad. Nac.Cien.,Cordoba, IX, p. 79,1886. 
Paradoxomydx Ameghino, Mam. Fos. Repub. Argentina, in Actas Acad. 
Nac. Ciencias, Cordoba, VI, p. 122, 1889. 
2 “The genus is probably to be regarded as the ancestral type of the 
Dipodidse, and indicates an American origin for this family.”—Scott, 
Proc. Acad. Nat. Sci. Phila., 1895, p. 286. INDEX OF GENERIC NAMES. 
[Extinct genera are printed in italics.] 
Page 
Abra 262 
Abrocoma 262, 263 
Abromys 252 
Abrothrix 254 
Acantherium 253 
Acanthion 253 
Acanthochoerus 253 
Acanthomys 259 
Acaremys 250 
Acomys 259 
Aconaemys 262, 263 
Acosminthus 259 
Acromys 254 
A ctenomys 262, 263 
Adelomys 265, 269 
Adelpkomys 262, 263 
Agouti 243, 248 
Agricola 257 
Akodon 254 
Allactaga 249 
A llomys 266 
Alticola 257 
Alviceola 257 
Amblyrliiza 246 
Amtnomys 257 
Ammospermophilus 266 
Amphiaulacomvs 256 
Amphilagus 262 
Amphiscturus 266 
Anaptogonia 257 
Anchimys 246 
Anisonyx 266 
Anoema 246 
Anomalurus 245 
Anotis 269 
Anteliomys 257 
Aplodontia 245 
Apodemus 259 
Archceomys 269 
Archilagus 269 
Arctomys 266 
Arosethrus 245 
Arvicanthis 259 
Arvicola 243, 257 
Ascomys 251 
Aspalax 268 
Aspalomys 268 
Asteromys 269 
Atherurus 253 
Atlantoxerus 266 
Aulacodon 246 
Aulacodus 262, 263 
Aulacomys 237 
Baginia 266 
Baiomys 254 
Bandicota 259 
Bathyergus 245 
Batomys 259 
Beloprymnus 249 
Bicuuedens 257 
Bifa 252 
Blainvillimys 269 
Blarinomys 255 
Borioikon 257 
Bothriomys 261 
Brachymys 252 
Brachytarsomys 255 
Brachyuromys 255 
Page 
Brachyurus 257 
Bramus 257 
Briaromys 247 
Budomys 269 
Caelogenus 248 
Caenomys 252 
Callodontomys. 246 
Callomys 247 
Callosciurus 266 
Callospermophilus 266 
Calomys 255 
Campicola 257 
Cannabateomys 263 
Capiguara 246 
Caprolagus 254 
Capromys 262, 263 
Cardiatherium 247 
Cardiodon 247 
Cardiodus 247 
Cardiomys 247 
Carpomys 259 
Carteroaon 262, 263 
Castor : 246 
Castoroides 246 
Castoromys 246 
Cavia 247 
Caviodon 247 
Cephalomys 269 
Ceratodon 247 
Cercolabes 250 
Cercomys 262, 263 
Cerodon 247 
Chsetodipus 252 
Chsetomys 250 
Chalicomys 246 
Chelodus 246 
Chilomys 255 
Chilotus 257 
Chinchilla 248 
Chionobates 254 
Chiropodomys 259 
Chiruromys 259 
Chloromys 246 
Chrotomys 257 
Chrysomys 268 
Chthonoergus 258 
Citillus 266 
Claviglis 252 
Cloromis 248 
Cobaya 247 
Ccelogenus 248 
Coendou 243, 250 
Ccetomys 245 
Colobotis 266 
Colonomys 253 
Colotaxis 253 
Colpostemma 248 
Conilurus 259 
Conodonles 246 
Conodus 246 
Contracavia 247 
Cournomys 269 
Crateromys 259 
Cratogeomys 251 
Craurothrix 259 
Cricetodipus 252 
Cricetodon 255 
Cricetomys.259 
Page 
Cricetulus 255 
Cricetus 255 
Cryptomys 245 
Ctenodactylus 262, 263 
Ctenomys 262, 263 
Cuandu 250 
Cuniculus 249, 254, 258 
Cutia 248 
Cuvierimys 269 
Cynomys 266 
Dactylorays 262, 263 
Dasymys 259 
Dasynotus 252 
Dasyprocta 248 
Decticadapis 265 
Decticus 255 
Deilemys 255 
Dendrobius 262, 263 
Dendromys 256 
Deomys 256 
Diabroticus 246 
Dicardia 250 
Diccelophorus 262, 263 
Dicolpomys 262, 263 
Dicrostonyx 258 
Dinomys 249 
Diocartherium 247 
Diplostoma 251 
Dipodillus 256 
Dipodomys 252 
Dipodops 252 
Dipoides 269 
Dipus 249 
Discolomvs 262, 263 
Dolichotis 247 
Drymomys 255 
Echimys 262, 263 
Echitiomys 263 
Echinoprocta 250 
Echinosciurus 266 
Echinothrix 250, 260 
Echiothrix 260 
Eligmodontia 255 
Elimodon 255 
Eliomys 252 
Eliurus 255 
Ellobius 258 
Elomys 260 
Enchomys 263 
Endecapleura 256 
Entoptychus 252 
Eocardia 250 
Eomys 255 
Eosciurus 266 
Eothenomys 258 
Eoxerus 266 
Epiblema 248 
Epimys 260 
Eremiomys 258 
Erethizon 251 
Eriomys 248 
Erythrosciurus 266 
Eucardiodort 247 
Eucastor 246 
Euchsetomys 266 
Euchoreutes 249 
Eucritus,,, 253 Index. 
Page 
Eulagos 254 
Eutnys 255 
Eutnysops 262, 263 
Kuneomys 255 
Eupetaurus . 266 
Euphilus 248 
Euryotis 261 
Eutamias 266 
Evotomys 258 
Earuticulus 266 
Fiber. 258 
Fossor 245 
Funambulus. 266 
Funisciurns 266 
Galea 247 
Genysccelus 243, 248 
Geomys 251 
Georychus 245 
Geosciurus 266 
Gerbillus 256 
Gergoviomys 269 
Glareolus 258 
Glis 252 
Golunda 260 
Graphimys 262, 263 
Graphiurus 252 
Guerlinguetus 266 
Guillinomys 262, 263 
Gundi 264 
Gymnomys 260 
Gymnoptychus 251 
Gymnuromys 255 
Gyriabrus 248 
Gyrignophus 262, 2b4 
Habrocoma 264 
Habrothrix 255 
Hallomys 255 
Halticus 249 
Haltomys 249 
Hamster 243, 255 
Hapalomys 260 
Hapalotis 260 
Haplodon 245 
Hap/ostropha 269 
Heaymys 250 
Helamys 265 
Heligmodontia 255 
Heliomys 260 
Heliophobius 245 
Heliosciurus 266 
Heliscomys 251 
Hemiotomys 258 
Hendecapleura 256 
Hesperomys 255 
Heterocephalus 245 
Iteterogeoinys 251 
Heteromys 252 
Heterosciurus 266 
Hodomys 261 
Holochilomys 255 
Holochilus 255 
Houtia 264 
Hydrochaerus 247 
Hydrolagus 254 
Hydromys 257 
Hyperacrius 258 
Hypogeomys 255 
Hypudaeus 258 
Hystricomys 269 
Hystricops 251 
Hystricotherium 253 
Hystrix 253 
Ichthyomys 255 
Ictidomys 267 
Idiurus 245 
Page 
Ischyromys 253 
Isodelta * 238 
Isodon 262, 264 
Isomys 260 
Isoptychus 269 
Isothrix 262, 264 
Issidibromys 269 
Jaculus 249 
Kaunabateomys 262, 264 
Kerodon 247 
Pagidium 248 
Lagodus 262 
Pagomys 262, 267 
Lagopsis 262 
Pagopsis 254 
Lagos 254 
Pagostomus 248 
Lagothevium 254 
Pagotis 248, 265 
Pagurus 258 
Lamprodon 253 
Paria 267 
Pasiomys 260, 262, 264 
Pasiopodomys ,. 258 
Pasiuromys 262, 264 
Peggada 260 
Peimacomys 256 
Leithia 267 
Lemmomys 258 
Lemmus 258 
Pemniscomys 260 
Leptomylus 246 
Pepus 234 
pimacomys 256 
Pimnolagus 254 
Pipura 267 
Liihomys 255 
Lomomys 262, 264 
Poncheres 262, 264 
Lonchophorus. 262, 264 
Pophiomys 254 
Lophioniys 260 
Pophuromys 260 
Loxomylus 246 
Macrocolus 252 
Macrogeomys 251 
Macrotolagns 254 
Macroxus 267 
Malacomy.s 260 
Malacothrix 256 
Mara 247 
Marcuinomys 262 
Marmota 267 
Marunsiomys 262 
Massoutiera 262, 264 
Mastacomys 260 
Mastonotus 262, 264 
Megalomys 255 
Megatnys 248 
Meniscomys 267 
Meriones 249, 257 
Mesomys 262, 264 
Microcavia 247 
Microdipodops 253 
Microlagus 254 
Micromys 260 
Micromys 252, 255 
Microsciurus 267 
Microtus 258 
Micrurus 258 
Mictomj's 258 
Misothermus 258 
Mixodectes 269 
Monax 267 
Morenia 262, 264 
Page 
Murinus 260 
Mus 260 
Muscardinus 252 
Musculus 260 
Mussascus 258 
Myarion 255 
Mylagaulus 246 
Mynomes 258 
Myocastor 258, 262, 264 
Myodes 258 
Myolagus 262 
Myolemmus 258 
Myopotamus 262, 264 
Myoscalops 245 
Myospalax 262 
Myotalpa 262 
Myotherium 255 
Myoxomys 255 
Myoxus 252 
Mysateles 262, 264 
Mysops 253 
Mystromys 255 
Nannomys 260 
Nannosciurus 267 
Necromys 255 
Nectomys 255 
Nelomys 262, 264 
Nelson ia 261 
Neodon 258 
Neoepiblema 248 
Neofiber 258 
Neomys 255 
Neomys 269 
Neoprocavia 247 
Neoreomys 262, 264 
Neosciurns 267 
Neotonia 261 
Neotomys 255 
Nesokerodon 269 
Nesokia 260 
Nesomys... 255 
Notiomys 255 
Notomys 260 
Nyctocleptes 268 
Nyctomys 255 
Ochetodon 255 
Ochetomys 259 
Oehotona 262 
Oetodon 262, 264 
CEdocephalus 253 
Olenopsis 262, 264 
Omegodus 269 
Ommatostergus 268 
Ondatra 259, 262, 264 
Onychomys 256 
Onychura 251 
Orchiomys 269 
Oreinomys 261 
Oreomys 261 
Oreomys 253 
Oromys 247 
Orthogeomys 251 
Orthomyctera 247 
Orihomys : 262, 264 
Orycteroniys 256, 264 
Orycterus 245 
Oryctolagns 254 
Oryctomys 231 
Oryzomys 256 
Osteopera 248 
Otocolobus 267 
Otognosis 253 
Otorays 256, 261 
Otospermophilus... 267 
Oxymycterus 256 
Paca 248 
Pachyuromys 257 Index. 
Page 
Paciculus 261 
Palceocastor 246 
Palceocavia 247 
Palaeolagus 254 
Palaeomys 246, 269 
Palceosciurus 267 
Palaiotrogus 270 
Palana!ma 269 
Palmista 267 
Paludicola 259 
Panoiax 254 
Pappogeomys 251 
Paradoxomys 270 
Pararnys 253 
Paranomys 262, 264 
Parasciurus 267 
Paraxerus 267 
Pectinator 262, 264 
Pedetes 265 
Pedotnys 259 
Pelamys 256 
Pellegrina 262, 264 
Pelomys 260 
Perimys 248 
Perodipus 253 
Perognatlius 253 
Peromyscus 256 
Perrieromys 269 
Petaurista 267 
Petromus 262, 264 
Phaiomys 259 
Phanomys 250 
Pheuacomys 239 
Phloeomys 261 
Phractomys 254 
Phtoramys 262, 264 
Phugatherium 247 
Phyllomys 262, 265 
Phyllotis 256 
Pika 243, 262 
Pinemys 259 
Pitymys 259 
Pithanotomys 262, 265 
260 
Pithecochirus 260 
Plagiodoutia 262, 265 
Platacanthomys 252 
Plataeomys 262, 265 
Platycercomys 249 
Platygeomys 251 
Platyodon 262 
Platypyga 248 
Platythrix 262, 265 
Plectrochcerus 231 
Plesiarctomys 267 
Plesispermophilus 267 
Pleurolicus 253 
Plexochcerus 247 
Pliolagostomus 248 
Poecilomys 262, 265 
Pcephagomys 262, 265 
Pogonomys 260 
Potamarchus 248 
Potamys 262, 265 
Praotherium 254 
Praticola 259 
Prea 247 
Procardia 250 
Procardiatherium 247 
Proca via 247 
Prolagus 262 
Prolagostomus 248 
Page 
Protechimys 269 
Protechynus 270 
Protoptychus 270 
Protoxerus 267 
Psammomys 257, 259 
Psammoryctes 262, 265 
Pseudoconomys 260 
Pseudomys 260 
Pseudoneoreomys 262, 265 
Pseudosciurus 265 
Pseudostoma 251 
Pseudotomus 253 
Pteromys 267 
Pterotix 267 
Ptyssophorus 261 
Pygeretmus 249 
Rattus 261 
Ratufa 267 
Reithrodon 256 
Reithrodontomys 256 
Rheithrosciurus 267 
Rhinosciurus 267 
Rhipidomys 256 
Rhithrodon 256 
Rhithrosciurus 267 
Rhizomys 268 
Rhombomys 257 
Rhynchotnys 261 
Rithrodon 256 
Romerolagus 254 
Rukaia 268 
Ruscinomys 262, 265 
Saccomys 253 
Saccophorus 251 
Saccostomus 261 
Scapteromys 256 
Scarturus 249 
Scavia 247 
Schistomys 250 
Schizodon 262, 265 
Sciamys 251 
Scirteta 249 
Scirtetes 249 
Scirtomys 249 
Scirtopoda 249 
Sciuravus' 253 
Sciurodon 265 
Sciuroides 265 
Sciuromys 253 
Sciuropterus 268 
Sciurus 268 
Scleromys 262, 265 
Scotaeumys 248 
Sigmodon 256 
Sigmodontomys 256 
Sigmogoniphius 246 
Simotes 259 
Sincetherus 251 
Siphneus 262 
Sitomys 256 
Smimhus 249, 250 
Spalacomys 261 
Spalacopus 262, 265 
Spalax 268 
Spaniomys 262, 265 
Spermophilopsis 268 
Spermophilus 268 
Spermosciurus 268 
Sphceramys 248 
Sphiggomys 248 
Page 
Sphiggurus 251 
Sphodromys 248 
Steatomys 256 
Steiromys 251 
Steneofiber 246 
Steneotherium 246 
Stereodecies 268 
Stichomys 262, 265 
Strata.'. 247 
Strophostephanos 248 
Syllophodus 253 
Sylvicola 259 
Sylvilagus 254 
Synetheres 251 
Synaptomys 259 
Tachyoryctes 268 
Tccniodus 269 
Talpoides 243, 268 
Tamias...., 268 
Tamiasciurus 268 
Taped 254 
Tatera 257 
Taxymys 253 
Tenomys 261 
Tenods 268 
Teonoma 261 
Terricola 259 
Tetramerodon 259 
Tetrastylus 248 
Theridomys 269 
Thomasomys 256 
Thomomys 251 
Thrichomvs 262, 265 
Thrinacodus 262, 265 
Thryonomys 262, 265 
Tillomys 253 
Titanomys 262 
Trechomys 269 
Tretomys 261 
Triaulacodus 262, 265 
Tribodon 262, 265 
Tricardia 250 
Trichys., 253 
Tritium 254 
Trilophomys 261 
Trinodontomys 256 
Trogontherium 246 
Tucanus 251 
Tylomys 256 
Tylonyx 259 
Typhlodon 268 
Typhlomys 252 
Typhlor3'ctes 245 
Uromys 261 
Vandeleuria 261 
Vesperinius 256 
Vesperomys 256 
Vizcacia 248 
Xenomys 261 
Xeromys 257 
Xerosperraophilus 268 
Xerus 268 
Yerbua ... 250 
Zapus 249, 250 
Zygodontomys 256 
Zygogeomys 251