126 PATAGONIAN EXPEDITIONS I ZOOLOGY. 



Arctocephaliis tiigrescens Gray, Zool. Erebus and Terror, t. f. — [cf. Gray, 

 P. Z. S., 1859, 109, 360 (based on a young skull, from "Falkland 

 Islands?" ; Cat. Seals and Whales, 1866, 52 (same specimen) ; Ann. 

 & Mag. Nat. Hist. (3), XVIII, Sept., 1886, 236 (same specimen, here 

 made type of a subgenus Euotaria) ; Suppl. Cat. Seals and Whales, 

 1 87 1, 20. 



Otaria [Arctophoca) nigrescens Peters, Monatsb. K. Akad. Berlin, 1866, 

 669. 



'' Otaria nigrescens (Gray)" Burmeister, Zeits. Naturwissensch. Halle, 

 XXXI, 1868, 198, in text ; referred by Burmeister to A . falklandica 

 (Shaw). 



Arctophoca nigrescens V^toxs, Monatsb. K. Akad. Berlin, 1871, 564. 



Euotaria nigrescens Gray, Ann. & Mag. Nat. His. (4), I, Feb., 1868, 106 

 (several Falkland Island specimens mentioned) ; ibid., IV, Oct., 1869, 

 264 (three skulls from Desolation Island, southwest coast of Pata- 

 gonia). 



Arctocephaliis grayii Scoii, Mamm. Recent and Extinct, 1873, 19. Avow- 

 edly a new name for A rctocep/iatiis /atklandiciis auct. 



Euotaria latirostris Gray, Hand-List Seals, 1874, 37, pi. xxvii, skull. 

 Based on a skull supposed to have come from Falkland Islands, 

 previously referred by Gray to his Arctocephaliis nigrescens. 



Arctocephaliis (Arctophoca) gracilis Nehring, Arch. i. Naturg., 1887, i, 

 92, pi. ii (skull, young). Rio Tramandahy, Rio Grande do Sul, 

 Brazil. 



? Otaria brae hydactyla Philippi, An. Mus. nac. Chile, I, Zool., 1892,6, 

 43, pi. xiii, fig. 2, animal, pi. xxii, skull, very young, with the milk 

 dentition ; length of animal, 900 mm. Chonos Archipelago. 



Arctocephaliis falclandicus var. gracilis Nehring, Sitzungsb. Ges. Naturf 



Freunde zu Berlin, 1877, 142 — coast of Rio Grande do Sul, Brazil. 



External Characters. — Pelage of two kinds of hair — long, coarse, 



blackish overhair tipped with gray or yellowish gray, giving a grizzled 



effect, except on the ventral surface, where the hairs are without gray 



tips ; beneath this is the thick soft brownish underfur, lighter at the tips 



and darker basally. 



In the absence of specimens it is almost impossible to give a satisfac- 

 tory description of the external characters of the South American Fur 



Seals. What the external distinctions may be, can be determined only by 



