468 INDEX GENERUM MAMMALIUM. 
©. 
Ocapia (see Okapia). Ungulata, Artiodactyla, Giraffidze. 
Ochetodon Cours, 1874. Glires, Muridee, Cricetinee. 
Proc. Acad. Nat. Sci. Phila., Dec. 15, 1874, 184; Mon. N. Am. Rodentia, 120- 
130, 1877. 
Type: Mus humilis Audubon & Bachman, from South Carolina. 
Name antedated by Reithrodontomys Giglioli, 1873. 
Ochetodon: óysróc, channel; óócr-—ó80Dsc, tooth—in allusion to the grooved 
upper incisors. 
Ochetomys Firzincer, 1867. Glires, Muridze, Microtine. 
Sitzungsber. Math.-Nat. Cl. K. Akad. Wiss., Wien, LVI, 105-105, 1867; MILLER, 
N. Am. Fauna, No. 12, pp. 17, 66, 1896 (in synonymy). 
Species, 7: Mus amphibius Linnseus, Hypudzus pertinax Savi, Arvicola destructor 
Savi, Mus terrestris Linneeus, Hypudzus nageri Schinz, Arvicola monticola Selys- 
Longchamps, and A. americanus Gray (not from America), and several sub- 
species—all from Europe. 
Ochetomys: Óóyerós, ditch, channel, in plural, waters; 44£s, mouse—‘ water 
mouse,’ in allusion to its aquatic habits. 
Ochotherium (see Ocnotherium). Edentata, Dasypodide. 
Ochotona Linx, 1795. Glires, Ochotonide. 
Jeytr. Naturgesch., I, pt. 11, 52, 74, 1795. 
Ogotona Fiscurr, Zoognosia, III, 95, 1814 (in synonymy). 
Ogotoma GRAY, Ann & Mag. Nat. Hist., 3d ser., X X, 220, Sept., 1867. 
Species, 3: Ochotona pusilla (— Lepus pusillus Linnzeus, ed. xii), from the southern 
Ural Mountains; O. alpina (=Lepus alpinus Linnezeus, ibid.), from Siberia; 
O. minor (= Lepus ochotona [ogotona] Linnzeus, ibid., type) from the mountains 
of southern Siberia and Mongolia east of Lake Baikal. ‘‘Type, from name, 
according to agreed rules."  (Tnowas.) 
Ochotona: Ochodona, Mongol name of the pika. (Parras, Reise, II, 701, 1773.) 
Ocnobates Corr, 1889. Edentata, Megatheriidze. 
Am. Naturalist, XXIII, 659, Aug. 1889. 
New name for Oracanthus Ameghino, 1885, which is preoccupied by Oracanthus 
Agassiz, 1837, a genus of Pisces. 
Antedated by Neoracanthus Ameghino, May, 1889. 

Extinct. 
Ocnobates: Ok vos, sluggish; barns, walker—i. e., asloth. 
Ocnopus REiNHanpr, 1875. Edentata, Megatheriide. 
Vidensk. Meddelelser Naturhist. Forening, Kjóbenhavn, 3die Aartis, VII, Nr. 
9-15, pp. 234-235, pl. tv, figs. 4, 5, 1875. 
Type: Megatherium laurillardii Lund, from Lapa Vermelha, near Lagoa Santa, 
Brazil. 
Extinct. 
Ocnopus: OKVos, sluggish, lazy; zovs, foot—i. e., a sloth. 
Ocnotherium Lunp, 1842. Edentata, Dasypodidee. 
K. Danske Vidensk. Selsk. Naturv. & Math. Afhandl., Kjóbenhavn, IX, 142-143, 
197, 1842. 
(Enotherium WAGNER, Wiegman's Archiv Naturgesch., 1843, I, 348; Ray Soc. 
Repts. on Zool. for 1843-44, p. 47, 1847. 
Ochotherium PrcrET, Traité Paléont., 2d ed., I, 272, 1853 (misprint). 
Type: Chlamydotherium gigas Lund, from the valley of the Rio das Velhas, Minas 
Geraes, Brazil. 
Extinct. 
Ocnotherium: Ók vos, sluggish, lazy; 07píov, wild beast—i. e., an extinct sloth. 
——— ee 
