Notes m-Paf Wassail. 
407 
NOTES ON PARASITES—47. 
On the priority of Cittotcenia Riehm, 1881, over Ctenotcenia Railliet, 1891. 
By Ch. Wardell Stiles and Albert Hass all. 
[Reprinted from The Veterinary Magazine, July, 1896, VoLIIL, No. 7.] 
Riehm (1881 A, p. 200) divided the tapeworms of rabbits 
and hares into the four species: Ttenia rhopalocephala, Dipyli- 
dium pectinatum, D. Leuckarti and Cittotcenia latissima, but 
later in the same year (1881 B) he rejected his new genus Citto- 
tcenia, placing the type and only species in Dipylidium (type 
D. Caninum). 
Railliet (1893, P- 278), evidently overlooking Riehm’s first 
paper, erected the genus Ctenotcenia (type Taenia marmotce) 
and included here: Ct. Goezei (= Riehm’s Cittotcenia latissima), 
Ct. Leuckarti and Ct. pectinata. Stiles (1895) and Stiles and 
Hassall (1896) also overlooked Riehm’s first paper, and accepted 
Railliet’s genus Ctenotcenia. 
Riehm’s generic term Cittotcenia must, however, be given 
priority over Railliet’s name Ctenotcenia as long as Tcenia mar- 
motce and Cittotcenia latissima (= Tcenia denticulated) remain in 
the same genus, the latter form being accepted as type species. 
The following parasites of rodents should be transferred to 
the genus Cittotcenia: Tcenia denticulata Rudolphi, 1804 (Citto- 
tcenia latissima Riehm, 1881); Tcenia marmotce Frdlich, 1802; 
Tcenia pectinata Goeze, 1782; Dipylidium Leuckarti Riehm, 
1881; Ctenotcetvia prcecoquis Stiles, 1895; Ct. perplexa. Stiles, 
1895; Ct. variabilis Stiles, 1896, with its varieties imbricata and 
augusta. 
Railliet, 1893—Trade de Zoologie mddicale et agricole, fasc. I. Paris. 
Riehm, 1881 A—Untersuchungen an den Bandwiirmern der Hasen und Kanin- 
chen; Zeitschr. f. d. ges. Naturwiss. Halle. Dritte Folge, VI. (Der ganzen 
Reihe, 54) p. 200. 
lBBl B—Studien an Cestoden; Zeitschr. f d. ges. Naturwiss. Halle. 
Dritte Folge, VI. (Der ganzen Reihe, 54) pp. 545-610. Taf. V-VI. 
Stiles, 1895—Notes on Parasites: 38. Preliminary note to “ARevision of the 
Adult Leporine Cestodes the Vet. Mag., 11., p. 341-346. 
- and HASSALL, 1896—Notes on Parasites—4l ; Ctenotania denticulata 
(Rudolphi, 1804). Stiles and Hassall, ISgfy; HLp.'A-p;—Also 
in Centralbl. f. Bakt., Paras, u. Infektionskfankh., L.Abth., XIX, p 70-72.