246 Palmer — Generic and Family Names of Rodents. 



CASTORIDiE. 



Castoridae Gray, London Medical Repository, XV, p. 302, April 1, 1821. 

 MylagauUdx Copk, 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 Linnpeus, 1758 Castor fiber (type), C. moschatus. 



* Castoroinys Pomel, 1854. C'hallcomys sigmodiis. 



Cludlcotnys Kaup, 1832 Chalicomys jaegeri. 



Chelodus Kaup, 1832 . . Chelodus typus. 



t C/i/oro?n?/s(Meyer)Schlosser, 1884 Chalicomys eseri. 



Conodontes Laugel, 1862 Conodontes boisriUeUi. 



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



Dlahroticus Pomel, 1848 Diahroticus schmerlingii. 



Eucastor Leidy, 1858 Castor tortus. 



Mylagaidas Cope, 1878 Mylagaidus sesquipedalis. 



Palxocastor Leidy, 1869 Steneofiber nebrascensis. 



Palaeomys Kaup, 1832 Falaeomys castoroides. 



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



Steneofiber GeofFroy, 1834 



Steneotlterium Geoffrey, 1833.... 



Trogontherium G. Fischer, 1809. . Trogontherlum cuvieri, T. werneri. 



CASTOROIDIDiE. 



Castoroididx J. A. Ai,i,ex, Mon. N. Am. Rodentia, p. 419, Aug., 1877. 

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



Amblyrhiza Cope, 1868 . . Amhlyrlnza inundata. 



Castoroides Foster, 1838. . Castoroides ohioensis. 



t Leptomylus Cope, 1869 Misprint for Loxomylus. 



Loxomylus Cope, 1869 Loxomylus longidens. 



CAVIIDiE. 



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. 

 Kerodoutina Gervais, in D'Orbigny's Diet. Univ< d'Hist. Nat., XI, 

 p. 204, 1849. 



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



Anchymis Ameghino, 1880 Cardiodon leidyi. 



Anoema F. Cuvier, 1809 Cavia cobaya. 



? C(dUjdontomys Ameghino, 1889. . Callodontomys vastatus. 

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

 sidered i^referable by Liais because 

 derived from the Indian name.) 



