246 Palmer — Generic and Family Names' of Rodents. 



CASTORID^. 



Castoridae Gray, London Medical Eepository, 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. 



Chelodas Kaup, 1832 ... Chelodus typus. 



t Chi oromy s{M.eyer)Sch\osser, 1884 Chalicomys eseri. 



Conodontes Laugel, 1862 Conodontes boisvilletii. 



t Conodus Gervais, 1867-'69 Emended form of Conodontes. 



Dlahroticus Pomel, 1848 Diabroticus schmerlingii. 



Eucastor Leidy, 1858 Castor tortus. 



Mylagaulus Cope, 1878 Mylagaulus sesquipedalis. 



Palseocastor Leidy, 1869 Steneofiher nebrascensis. 



Falaeomys Kaup, 1832 Falaeomys castoroides. 



Sigmogomphius J. C. Merriam, 1896. Sigmogomphius lecontei. 



Steneofiber Geoffroy, 1834 



Steneotherium Geoffroy, 1833 



Trogontherium G. Fischer, 1809. . Trogonthe.rlum cuvieri, T. iverneri. 



CASTOROIDIDiE. 



Castoroididse J. A. Am/ex, 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. 



CAVIIDiB. 



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. 



Name, authority, and date. Type or included species. 



Anchymis Ameghino, 1886 Cardiodon leldyi. 



Anoema F. Cuvier, 1809 Cavia cobaya. 



? Cidlodontomys Ameghino, 1889. . Callodontomys vastatus. 

 Capiguara Liais, 1872 New name for Hydrochcerus. (Con- 

 sidered preferable by Liais because 

 derived from the Indian name.) 



