474 INDEX GENERUM MAMMALIUM. 
Olygodon AwrcHriNo, 1883. Edentata, Megatheriide. 
Bol. Acad. Nac. Cien. Córdoba, V, entr. 3, pp. 299-300, 1883. 
Olig[odon] THomas, Zool. Record for 1883, X X, Mamm., 55, Index, p. 8, 1884. 
Type: Olygodon pseudolestoides Ameghino, from the barrancas del Paraná, Entre 
Rios, Argentina. 
Name preoccupied by Oligodon Boie, 1827, a genus of Reptilia. 
Extinct. Based on a single upper canine. - 
Olygodon: dAty oc, few, small; 66@v = ó60vzc, tooth. 
Olygotherium (see Oligotherium). Edentata, Megatheriidze. 
Omegodus Powzr, 1854. Glires, Theridomyidee. 
[^Omegadonte' PoxEL, Bull. Soc. Géol. de France, 2° sér., I, 593, 1844.] 
[Omegadon PoxuEL, in Agassiz’s Nomenclator Zool., Mamm., Addenda, 7, 1846; 
Meyer, in Bronn’s Index Paleont., IV, 843, 1848; PrcrET, Traité Paléont., 2° 
éd., I, 254, 1853—nomen nudum. ] 
Cat. Méth. Vert. Foss. Bassin de la Loire, 37-38, 1854; TnRovzssanmr, Cat. Mamm. 
Viv. et Foss., Rodentia, Bull. Soc. Études Sci. d' Angers, X, 2* fasc., 167, 1881. 
Type: Omegodus echinyoides Pomel, from the Miocene of Chaufours, Puy-de- 
Dóme, central France. 
Extinct. 
Omegodus: O., c u£y a, or long o of the Greek alphabet; 650Us,tooth—from the 
arrangement of the enamel folds of the molars. 
Ommatophoca Gray, 1844. Ferze, Pinnipedia, Phocid:e. 
Zool. Voy. H. M. S. ‘Erebus & Terror,’ pt. 1, Mamm., 3, pls. vrr-vri, 1844; 
ALLEN, Hist. N. Am. Pinnipeds, 463, 467, 1880. 
Ommatophora Turner, Proc. Zool. Soc. London, 1848, 88. 
Type: Ommatophoca rossii Gray, from the Antarctic Ocean. 
Ommatophoca: ua, Ouparos, eye; -+-Phoca—in allusion to the immense orbits. 
Ommatostergus NorpMANN, 1840. Glires, Spalacidee. 
NorpMANN, in Keyserling & Blasius Wirbelth. Europas, pp. vii, 31, 1840. 
Type: Ominatostergus pallasii Nordmann, from the neighborhood of the Caucasus 
Mountains, Russia. 
Ommatostergus: óujtcroór epe, bereft of eyes; Zpyc, to work—in allusion to its 
subterranean habits. 
Omomys Lripy, 1869. Primates, Notharetidze? 
Proc. Acad. Nat. Sci. Phila., Apr., 1869, 63-65; Journ. Acad. Nat. Sci., 2d ser., 
VII, 408, 1869; OsBorn, Bull. Am. Mus. Nat. Hist., N. Y., XVI, 190, fig. 19, 
June 28, 1902. 
Type: Omomys carteri Leidy, from the Eocene near Fort Bridger, Wyoming. 
Extinct. Based on ‘the greater part of the right ramus of the lower jaw.’ 
Omomys : cuoc, shoulder; jevs, mouse—in allusion to the basal ridge of the 
premolars(?). 
Oncifelis (subgenus of Felis) Srvertzow, 1858. Feree, Felide. 
Revue et Mag. de Zool., Paris, 2° sér., X, 386, 390, Sept., 1858. 
Type: Felis geoffroyi Gervais, from the Rio Negro, Patagonia. 
Oncifelis: Onca, specific name of the spotted cat of tropical America; -- Felis. 
Oncoides (subgenus of Felis) SgvERTZOw, 1858. Fer, Felidze. 
Revue et Mag. de Zool., Paris, 2° sér., X, 386, 390, Sept., 1858; TRovkssanr, Cat. 
Mamm. Viv. et Foss., new ed., fasc. 11, 357-360, 1897. 
Species, 3: Felis (Oncoides) pardalis Linneus, from tropical America; I’. ( Oncoides) 
macroura Maximilian, from eastern Brazil; and F. ( Oncoides) tigrina Schreber, 
from South America. 
Oncoides: Onca, specific name of the spotted cat of tropical America; £280, form. 
