4. ARCIOOEPHALTTS. 17 



that Mr. Allen had of more materials when he undertook a revision 

 of the family. 



4. ARCTOCEPHALUS. 

 Ajctocephalus, F. Cuvier, Peters. 



The face of the skull elongate, forehead flat. The palate con- 

 cave, especially in front, with a thickened margin on each side near 

 the teeth, and then narrowed behind; the internal nasal opening 

 elongate, longer than broad, narrow and arched in front, the edge 

 in a line with the orbital process of the zygomatic arch, which is 

 large and well developed. Flap of toes moderate. 



In the adult skull of A. antaretiea, from the Cape, the fifth 

 hinder grinder has only very short rounded callous roots, which 

 are slightly divided into two lobes ; and the hinder sixth upper 

 grinder seems to have a root of the same character. But not having 

 any skulls of younger animals, I am not able to describe what are 

 the forms of the roots of these two teeth in the younger state. 



In the skulls of the older specimens (which axe not adult, as they 

 have the sutures between the bones BtUl distinct), the fifth and 

 sixth upper grinders have two distinct diverging roots. 



* The fifth and sixth upper grinders with two roots (?) ; the sixth upper 

 partly behind the hinder edge of the. zygotnatic arch. Arcto- 

 cephalus. (Africa.) 



1. Arctocephaliis autarcticus. The Gape Fur-Seal, 



Phoca antaretiea, Thwnh. Mem. Acad. P4^rsb. ill. p. 322 ; Fischer's 



St/nop. p. 242. 

 Arctocephalus schisthjrperoes, Ttirner, Journ. Anat. 1868, p. 113,, 



f. . . 

 Arctocephalus schistuperus, OUnther, Zool. Record, 1868, p. 20. 

 Arctocephalus antarcticus, Gray; Allen, Bidl. Mus. Comp. Zool. ii.' 



p. 45. 

 Arctocephalus Delalandii, 'Oray, P.Z. S. 1859, t. 69 (skull) ; Ann." 

 8f Mag. N. S. 1866, vol. xviii. p. 235 ; Cat. S. %■ W. p. 62. ■ 



Phoca ursina, Cuvier, Oss. Foss. t. 219. f. 5. 

 Arctocephalus ursinus, F. Cuvier, M4m. Mm. vol. xi. p. 205, t. 15, 



no. 1. o,6, c (skull). 

 Otaiia uTsina, Nilsson. 

 Halarctus Delalandii, Gill, I. c. p. 7. 



Otaria (Arctocephalus) pusilla, Peters, Monatsh. 1866, pp. 271 & 671.' 

 jMmor. Petit Phoque, Buffon, H. N. xiii. t. 53,= Phoca pusilla,' 

 Schreb. 

 Inhab. South Africa, Cape of Good Hope. 



The two adult skuUs in the British Museum differ greatly in the 

 width of the hinder nasal opening, in the form of the hinder lower 

 lateral processes of the occipital bone, in the form of the back of 

 that bone, and in the shape of the condyles. 



The skull from the Cape of Good Hope, in the Museum of 

 the University of Edinburgh, was described a,nd figured by Dr. 

 Turner under the name of Arctocephalus schisihyperoes, in the. 

 ' Journal of Anatomy and Physiology,' vol. iii. p. 113. The name 



c 



