472 INDEX GENERUM MAMMALIUM. 
Ogotoma Gray, 1867. Glires, Ochotonidze. 
Ann. & Mag. Nat. Hist., 3d ser., X X, 220, Sept., 1867. 
Ogotona, FiscHER, Zoognosia, III, 95, 1814 (in synonymy ). 
Type: Lepus ogotoma Pallas, from Mongolia. Ogotoma is here described as dis- 
tinct from Lagomys Cuvier, 1800. (See Ochotona Link, 1795.) 
Ogotoma: Ochodona, Mongol name of the pika. 
Okapia LaxkEsrER, 1901. - Ungulata, Artiodactyla, Giraffide. 
Nature, vol. 64, No. 1653, p. 247, July 4, 1901; Tageblatt V. Internat. Zool. 
Congresses, Berlin, No. 6, pp. 6-7, Aug. 16, 1901; ForsyrH Mason, Proc. Zool. 
Soc. London, 1902, II, pt. 1, 73-79, text fig. 7, Oct., 1902 ( Okapia liebrechtsi 
Major); LANKEsTER, Ann. & Mag. Nat. Hist., 7th ser., X, 417-418, Nov. 1, 1902 
( Okapia erikssoni Lankester). 
Ocapia LANKESTER, Science, new ser., XIV, 114, July 19, 1901 (quoting London 
Times, June 18). 
Type: Okapia johnstoni ( — Equus? johnstoni Sclater), from the forests along the 
Semliki River, Congo Free State, Africa. 
Okapia: Okapi, native name of this animal. 
Olbodotes Osporn, 1902. Glires, Proglires, Mixodectide. 
Bull. Am. Mus. Nat. Hist., X VI, 204, 205-206, figs. 29, 29a, June 28, 1902. 
Type: Olbodotes copei Osborn, from the Eocene (Torrejon) of New Mexico. 
Extinct. Based on a left lower jaw. 
Olbodotes: 6A fod0rns, a giver of bliss—‘‘in reference to the happy solution it 
affords of the problem of the homology of the enlarged incisor teeth." (OsBorn. ) 
Oldfieldthomasia AmrGuino, 1901. Ungulata, Hyracoidea, (Acoelodidee). 
Bol. Acad. Nac. Cien. Cérdoba, X VI, 366-369, July, 1901 (sep. pp. 20-23). 
Species, 10: Oldfieldthomasia furcata Ameghino, O. cuneata Ameghino, O. cingulata 
Ameghino, O. marginalis Ameghino, O. conifera Ameghino, O. parvidens Ame- 
ghino, O. pulchella Ameghino, O. transversa Ameghino, O. septa Ameghino, and 
O. anfractuosa Ameghino, from the ‘Cretaceous’ of Patagonia. 
Extinct. 
Oldfieldthomasia: In honor of Oldfield Thomas, 1858—, curator of mammals, 
Natural History Museum, London; author of ‘ Catalogue of the Marsupialia and 
Monotremata in the British Museum,’ 1888, and numerous papers on mammals. 
Olenopsis AMEGHINO, 1889. Glires, Octodontid:e. 
Cont. Conocimiento Mamíf. Fósil. Repub. Argentina, in Act. Acad. Nac. Cien., 
Córdoba, VI, 145-146, 901-902, pls. vr figs. 14-16, Lxxxm fig. 4, 1889. 
Type: Olenopsis uncinus Ameghino, from the Lower Eocene of the barrancas of 
the Rio Santa Cruz, southern Patagonia. 
Extinct. *'Conozco las partes siguientes: La primera muela superior del lado 
izquierdo de un individuo jóven . . . Parte de la rama izquierdo de la mandí- 
bula inferior, con el incisivo, las dos primeras muelas intactas y bien desar- 
rolladas y la tercera . . . procedente de un indivíduo jóven . . . Primera 
muela inferior (p. 4) del lado derecho, de un individuo adulto." 
Olenopsis: @AEévy, elbow; óv:c, appearance—in allusion to the V-shaped middle 
fold of enamel of the lower molars. 
Olidosus (subg. of Tayassu) MERRIAM, 1901. Ungulata, Artiodactyla, Tayassuid:e. 
Proc. Biol. Soc. Wash., XIV, 120-122, July 19, 1901. 
Species: Dicotyles albirostris Iliger (type), from South America; and Tayassu 
albirostris ringens Merriam, from Apazote, near Yohaltun, Campeche, Mexico. 
Olidosus: Lat. olidus, stinking; sus, hog—from its musky odor. 
Oligobiotherium Awxraniwo, 1902. Marsupialia, Microbiotheriide. 
[Anal. Soc. Cien. Argentina, LI, 77, Mar.-Apr., 1901—nomen nudum]; 
Bol. Acad. Nac. Cien. Córdoba, XVII, 124-125, May, 1902 (sep. pp. 56-57). 
Type: Oligobiotherium divisus Ameghino, from the Patagonian formation (Eocene) 
of Patagonia. 
