236 On the Skulls of Sea-Bears and Sea-Lions. 
The two adult skulls 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 fourth, fifth, and sixth upper grinders with two distinct diverging 
roots ; the fifth in a line with the hinder edge of the zygomatic arch. 
Euotaria. (America.) 
2. Arctocephalus nigrescens, Gray, Cat. Seals & Whales, p. 52. 
The Southern Fur-Seal. 
Hab. Falkland Islands ? 
The two skulls of this species in the British Museum agree 
in most particulars ; but they differ considerably in the form of 
the hinder nostrils. The larger one is without its upper teeth, 
but the form of the roots are well exhibited by their sockets ; 
the front edge of the hinder nasal opening is produced rather 
further forward, and is acutely angular. The other skull, which 
is rather small and has the teeth in a good condition, has the 
hinder nasal opening with a slightly arched, nearly truncated, 
front edge. 
Dr. Peters refers Phoca Falklandica (Shaw, Zool. i. p. 256) and 
Otaria Falklandica (Hamilton, Ann. & Mag. N.H.1839, p.81,t.4; 
Jardine, Nat. Lib. vi. p. 271, t. 25) to this species. But as neither 
Dr. Shaw nor Dr. Hamilton describes the number or position of 
the teeth, it is not possible to determine if this is the Fur-Seal 
of the sealers, collected at the Falkland Islands, more especially 
as the fact of the skull coming from the Falkland Islands is not 
well ascertained. See the other synonyma which have been 
established on the sealers’ descriptions and figures or the skins 
collected for the furriers at the Falkland Islands (Gray, Cat. of 
Seals & Whales, pp. 55,56). Dr. Hamilton, who prides himself 
on his figure, represents the hind legs as extended behind ; but 
they look very awkward in that position, the stuffer having 
evidently had a difficulty in extending them. 
*** Fourth, fifth, and sixth upper grinders with two diverging roots ; the 
Sifth upper grinder entirely behind the hinder edge of the zygomatic 
arch. The palate narrow. Gypsophoca. (Australia.) 
3. Arctocephalus cinereus, Gray, Cat. Seals & Whales, p. 56. 
Australian Fur-Seal. 
Oltaria cinerea, Péron?; Quoy & Gaimard, Voy. Astrol. p. 89, t. 12, 13, 15 
(animal and skull); Peters, Monatsb. 1866, p. 272. 
Arctocephalus nigrescens, b & c, Gerrard, Cat. Bones B. M. p. 147. 
Black Seal, Otaria, Cat. Sydney Museum, ii. p. 36. 
Hab. Australia. John Macgillivray. 
Black, greyer beneath ; under-fur abundant, reddish brown. 
There are the stuffed skin, with its skull, and the bones of the 
