284 Dr. J. E. Gray on the Skulls of Sea-Bears 



of Steller, from Behring^s Straits ; so they evidently confound 

 two species under that name. 



The figure of Pander and D^ Alton is so imperfect that it 

 would have been impossible to determine the species it repre- 

 sents without the examination of the original skull, and then 

 one sees that it might be intended for the species to which it is 

 referred. The same observation is applicable to the figure of 

 the skull of Steller's Sea-Bear. 



C. The grinders 6/5, the third upper under the front edge of the orbit, the 

 fifth and sixth behind the back edge of the zygomatic arch j the upper 

 hinder grinders two-rooted. 



6. Phocarctos, Peters. 

 Arctocephalus § II., Gray, Proc. Zool. Soc. 1859, p. 109. 



The skull elongate, forehead flat. The palate concave, deep, 

 with a thickened margin on each side in front, widest in the middle 

 part of the tooth-line, and gradually narrowed behind the teeth ; 

 the internal nares oblong, longer than broad, truncate in front, 

 the front edge in a line with the orbital process of the zygomatic 

 arch. Grinders large, compressed; the fifth and sixth upper 

 behind the back edge of the zygomatic arch. The grinders have 

 compressed roots ; some of them have a very indistinct longitu- 

 dinal groove on the side; the fifth upper grinder has two distinct 

 roots. The ear-bones scarcely prominent, with a flat lower surface. 



I have not seen an adult skull of this genus. The skulls 

 described are 10 inches long, but the bones are not knit. 



Phocarctos Hookeri, Peters, Monatsb. 1866, p. 262. 

 The Southern Hair-Seal. 



Arctocephalus Hookeri, Gray, Zool. E. & T. 1. 14, 15 (skull.) 

 The Hair-Seal of the sealers. 



Hab. Falkland Islands and Cape Horn. 



The skull of the young animal described and figured by Dr. 

 Burmeister as Arctocephalus Falklandicus (Ann. and Mag. N. H. 

 1866, xviii. p. 99, t. 9. f. 1 & 2) is probably the young skull of 

 this species. It agrees with it in the elongated form of the 

 skull, and in the large size and great development of the pro- 

 cesses of the orbits. 



Dr. Peters regards the Otaria UIIocb of Von Tschudi (Fauna 

 Peruana, p. 136, t. 3) as a second species of this group. There 

 are two skulls which he refers to it in the Berlin Museum. 



7. Callorhinus, Gray, P. Z. S. 1859, p. 359; Peters. 



Arctocephalus, Gill ! 



Skull elongate ; forehead rounded in front of the orbit, rather 



swollen. Palate rather concave, as wide in front as at the end 



of the tooth-line, rather narrowed behind. The sixth upper 



