106 Dr. J. E. Gray on the Fur- and Hair-Seals 
2. Euotaria nigrescens, Gray, 
Ann. & Mag. Nat. Hist. 1866, xviii. p. 236. 
The synonymy. of this species will be— 
Arctocephalus nigrescens, Gray, Zool. Erebus and Terror, t.; P. Z. S. 1859 
PP. ie 360; Cat. Seals and Whales, p. 52; Gerrard, Cat. of Bone: 
eed 
Arctocephalus (Euotaria) nigrescens, Gray, Ann. & Mag. Nat. Hist. 1866, 
XViii. p. 236. 
Otarva (Arctocephalus ?) Falklandica, Peters, Monatsb. 1866, p. 273. 
Otaria (Arctophoca) Falklandica, Peters, Monatsh. 1866, p. 671. ! 
Hab. Falkland Islands, Volunteer Rock (Capt. Abbot). 
In the first essay, Dr. Peters places Phoca falklandica, 
Shaw, and Otaria nigrescens together, with doubt, observing 
that one was known from the skin and the other by the skull, 
overlooking the fact that the name nigrescens implied that 
I had seen the colour of the fur, which was not that given 
by Shaw to his animal; in his second essay, Dr. Shaw’s, 
Dr. Burmeister’s, and my animal are all classed together with- 
out any doubt. 
The skull of Capt. Abbot’s Fur-Seal from the Falkland 
Islands shows that it was a very young animal, which had 
only developed its first grinders, the permanent series being 
developed below them. ‘The tentorium is bony and well- 
developed. The teeth are the same in position and number 
as they are in the adult skull; and the upper ones, as far as 
developed, are small and conical, except the fifth upper 
inder, which is largest, triangular, with a single subconical 
lobe on the base of the hinder edge of the cone. The 
lower canines are small, scarcely larger than the cutting- 
teeth, which are nearly uniform in size. The lower grinders 
are of a much larger size than the upper ones in the adult 
skull, as if they belonged to the permanent series: they 
are of the same form as the teeth im adult skulls; but the 
central cone is higher and more acute, and the anterior and 
posterior lobes at the base of the cone are more developed and 
acute, the lobes of the last or fifth grinder being larger and 
rather on the inner surface of the tooth. 
The skull of Capt. Abbot’s animal is evidently not the same 
as the skull of a young Eared Seal described and figured by 
Dr. Burmeister as the skull of Arctocephalus falklandicus from 
the mouth of the Rio de la Plata, in the Ann. & Mag. Nat. 
Hist. ser. 3. vol. xviii. p. 99, t. 9, which, from the appearance 
of the grinders, I suspect is the young skull of Phocarctos 
Hookert, the Hair-Seal of the Falkland Islands. 
There is a considerable difference in the proportions of the 
skull sent by Capt. Abbot from those of the one figured by 
