and Sea-Lions in the British Museum, 235 
grinder just behind the hinder edge of the zygomatic arch; the 
grinders moderate, fifth and sixth upper and the fifth lower with 
two diverging roots. 
Callorhinus ursinus, Gray, P. Z. S. 1859, p. 359, t. 58 (skull). 
Northern Sea-Bear. 
Ursus marinus, Steller. 
Phoca ursina, Linn.; Pander & D’Alton, t. 7. f. 1 (not good). 
Otaria ursina, Péron; Peters. 
O. Kraschenninikowiti, Lesson. 
O. Stelleri, part., Lesson & Miller. 
Hab. Kamtschatka. B.M. 
D. Grinders 6/6, the third upper grinder under the front edge of the 
orbit, the hinder ones far back behind the back edge of the zygoma. 
Arctocephalina. 
8. ArcrocePHALus, F. Cuvier, Peters. 
Halarctus, Gall. 
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, about as wide in front as between the hinder 
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. 
In the adult skull of A. Delalandii from the Cape the fifth 
hinder grinder has only very short rounded callous roots, which 
are slightly divided into two lobes; and the hinder or 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 de- 
scribe what are the forms of the root of these two teeth in the 
younger state. 
In the skulls of the other species (which are not adult, as they 
have the sutures between the bones still 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 zygomatic arch. Arctocephalus. 
(Africa.) 
1. Arctocephalus Delalandit, Gray, P. Z. S. 1859, t. 69 (skull). 
The Cape Fur-Seal. 
Phoca ursina, F. Cuvier, Oss. Foss. t. 219. f. 5. 
Arctocephalus ursinus, F. Cuvier. 
Otaria ursina, Nilsson. 
O. Peronii, Desm. 
O. Delalandii, F. Cuvier. 
O. pusilla, Peters. 
Junior. Petit Phoque, Buffon, H. N. xiii. t. 53=Phoca pusilla, Schreb. 
Hab. South Africa, Cape of Good Hope. 
