ONDATRA—ONYCHOGALEA. 475 
Ondatra Link, 1795. Glires, Octodontidze. 
Beytràge Naturgesch., I, pt. 1r, 52, 76, 1795; LacÉPEDE, Tabl. Mamm., 9, 1799; 
Nouv. Tableau Méthod. Mamm., in Buffon’s Hist. Nat., Didot ed., Quad., 
XIV, 166, 1799; Mém. de l'Institut, Paris, III, 495, 1801. 
Species: Ondatra coypus (— Mus coypus Molina), from Chile; and O. zibethicus 
( — Castor zibethicus Linnzeus), from eastern Canada. 
Name antedated by Myocastor Kerr, 1792. 
.Ondatra: Indian name of the muskrat of North America. 
Onichogalea (see Onychogalea). Marsupialia, Macropodidee. 
Onohippidium Moreno, 1891. 
Revista Mus. La Plata, II, entr. 11, 65-71, 1891. 
Onohippus BunMEISTER, Anal. Mus. Nac., Buenos Aires, III, entr. 18, pp. 470-471, 
1891; LvpEKKER, Zool. Record for 1891, XX VIII, Mamm., 40, 1892. 
Type: Onohippidium munizi Moreno, from the Lower Pampean formation of ‘ La 
Loberia,’ on the Atlantic coast of the province of Buenos Aires, Argentina. 
Extinet. Based on ‘un cráneo bastante perfecto . . . [8] vertebras . . . la 
parte proximal de las cuatro ültimas costillas . . . todos los huesos del miembro 
anterior izquierdo." 
Onohippidium: Óvoz, ass; +-Hippidium. 
Onotragus Gray, 1872. Ungulata, Artiodactyla, Bovidee. 
Cat. Ruminant Mamm. Brit. Mus., 17-18, 1872; ScrLATER & THomas, Book of 
Antelopes, II, pt. vr, 95, Aug., 1896 (in synonymy, type fixed). 
Species: Adenota lech?e Gray (type), from South Africa; and Antilope vardonii 
Livingstone, from Central Africa. 
Onotragus: Ov 0s, ass; rp&y oc, goat. 
Ontocetus Lzipv, 1859. Cete, Physeteridz. 
Proc. Acad. Nat. Sei. Phila., 1859, 162; Journ. Acad. Nat. Sci. Phila., 2d ser., 
VII, 440, 1869. 
Type: Ontocetus emmonsi Leidy, from the Miocene of North Carolina. 
Extinct. Based on ‘a very large tooth, much mutilated and black in color.’ 
Ontocetus: Gv, óvroc, being; «?jros, whale. 
Onychodectes Corr, 1888. Edentata, Ganodonta, Conoryctide. 
[Am. Naturalist, X XII, 161, Feb., 1888—nomen nudum]. 
Trans. Am. Philos. Soc., new ser., XVI, pt. 11, 317—319, pl. v figs. 8-9, 1888. 
Type. Onychodectes tissonenis Cope, from the lowest beds of the Puerco Eocene of 
Ungulata, Perissodactyla, Equidee. 
New Mexico. 
Extinct. Based on ‘both maxillary bones with the posterior five molars; the 
left mandibular ramus with all the alveoli, and the second true molar in place; 
the glenoid extremity of the scapula; the left ilium; the right astragalus and 
cuboid.’ 
Onychodectes: óvv&, óvvyosc, claw; S7KTNs, biter. 
Onychogale Gray, 1864. Fer, Viverridze. 
Proc. Zool. Soe. London, 1864, 570; Cat. Carn., Pachyderm., & Edentate Mamm. 
Brit. Mus., 168, 1869. 
Type: Herpestes maccarthix Gray, from Ceylon. 
See Onychogalea Gray, 1841, a genus of Marsupialia. 
Onychogale: 6vvé, Ovvyos, claw; y «A5, weasel—in allusion to the front claws, 
which are long, compressed, and curved. 
Onychogalea (subgenus of Macropus) Gray, 1841. Marsupialia, Macropodidee. 
Gray, in Grey's Journ. Two Expds..N. W. and West Australia, App. II, 402, 1841. 
Onichogalea Gray, List Spec. Mamm. Brit. Mus., pp. xxii, 88, 1843 (raised to 
generic rank). 
Onychogale Tuomas, Cat. Marsup. & Monotrem. Brit. Mus., 73-79, 1888. 
