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Titles
- An essay on the classification of Nemertes and Planariæ: preceded by some general considerations on the primary divisions of the animal kingdom1
- Descriptions of new fishes collected by A.L. Heermann, naturalist attached to the survey of the Pacific Railroad route under Lieut. R.S. Williamson, U.S.A1
- Essay on the classification of Nemertes and Planariæ: preceded by some general considerations on the primary divisions of the animal kingdom1
- Historical sketch of Gordiaceæ1
- Life in its physical aspects1
- On the genus Cottus auct1