478 INDEX GENERUM MAMMALIUM. 
Oracodon Mansu, 1889. Allotheria, Plagiaulacid:ze. 
Am. Journ. Sci. & Arts, 3d ser., X XXVIII, 178-179, pl. viri figs. 13-16, Aug., 1889. 
Type: Oracodon anceps Marsh, from the Cretaceous (Laramie) of Wyoming. 
Extinct. Based on ‘a number of peculiar teeth, mostly premolars... The 
type specimen . . . is apparently a lower premolar from the right side.’ 
Oracodon: Opos, mountain; di», point; dd6@v=ddovs, tooth. 
Orasius Oxen, 1816. . Ungulata, Artiodactyla, Giraffidze. 
Lehrbuch Naturgesch., 3ter Theil, 2te Abth., 744—745, 1816; WAaxNER, Sitzungsber. 
K. Bayerisch. Akad. Wiss., München, II, Heft 1, 78-79, 1861. 
Type: Cervus camelopardalis Linnzeus, from Ethiopia, Africa. (See Giraffa Bris- 
son, 1862.) 
Orasius: A name given to the giraffe in the 13th century by Vincentus Bellova- 
censis (who died about 1264), and by Albertus Magnus (1195-1280). 
Orca WacLER, 1830. Cete, Physeteride. 
Nat. Syst. Amphibien, 34, 1830. s; 
Species: Delphinus bidentatus Bonnaterre, from the North Sea; and D. desmarestit 
Risso, from Nice, France. 
Orca: Lat., a kind of whale. 
Orca Gray, 1846. Cete, Delphinide. 
Zool. Voy. H. M. 8. ‘Erebus & Terror,’ 33-34, pls. 8-9, 1846; Wiegmann's Archiv 
Naturgesch., 1847, Bd. II, 39; Cat. Seals & Whales Brit. Mus., 278-290, 1866. 
Species, 4: Orca gladiator Gray ( = Delphinus orca Linn:eus), from the Atlantic 
Ocean; O. crassidens (= Phocena crassidens Owen), from Lincolnshire, England; 
O. capensis Gray, from the Cape of Good Hope; and O. intermedia (= Delphinus 
intermedius Gray ), locality unknown. 
Name preoccupied by Orca Wagler, 1830, a genus of Physeteridie. (See Orcinus 
Fitzinger, 1860. ) 
Orcaella (subgenus of Orca) Gray, 1866. Cete, Delphinidz. 
Cat. Seals & Whales Brit. Mus., 285-289, fig. 57, 1866; Syn. Whales & Dol- 
phins, 7, 1868 (raised to generic rank ). 
Orcella ANDERSON, Proc. Zool. Soc. London, 1871, 142 footncte. 
Type: Phocena ( Orca) brevirostris Owen, from Vizagapatam, Madras Presidency, 
east coast of India. 
Orcaella: Dim. of Orca. 
Orchiomys AmeGurino, 1897. Glires, Cephalomyidee. 
La Argentina al través de las Ultimas Epocas Geológicas, 18 footnote, 1897 
(nomen nudum); Bol. Inst. Geog. Argentino, XVIII, 495, Oct. 6, 1897. 
Type: Orchiomys prostans Ameghino, from the ‘Cretaceous’ of Patagonia. 
Extinct. 
Orchiomys: Opxis, opyzoc, testicle; 0s, mouse. 
Orcinus Firzrncer, 1860. Cete, Delphinidee. 
Wiss.-populüre Naturgesch. Sáugethiere, VI, 204-217, 1860; Patmer, Proc. Biol. 
Soc. Wash., XIII, p. 24, Jan. 31, 1899 (name revived); W. L. SCLATER, 
Mamm. 8. Africa, II, 197-199, fig. 145, 1901. 
Type: Orcinus orca (= Delphinus orca Linn:us), from the Atlantic Ocean. 
Orcinus: Lat. orca, a kind of whale. 
Orcopsis VAN BENEDEN, 1876. Cete, Delphinide. 
dull. Acad. Roy. Sci. de Belgique, 2° sér., XLI, No. 2, pp. 489-492, 1876. 
Type: Delphinus acutidens Meyer, from the Miocene of Germany. 
Extinct. Based on ‘le maxillaire inférieur avec les dents en place et quelques 
ossements isolées.’ 
Orcopsis: Orca; ows, appearance. 
Oreamnos (subg. of Mazama) Rarinesque, 1817. Ungulata, Artiodactyla, Bovide, 
Am. Monthly Mag., II, 44, Nov., 1817; Merriam, Science, new ser., I, No. 1. 
p. 19, Jan. 4, 1895 (raised to generic rank ). : 
