7. EtTMETOPIAS. 29 



front part of the younger skull, which was received from Mr. Gould, 

 the teeth are placed rather further back than in the adult skull from 

 North Australia received from Capt. Grey, the hinder part of the 

 fifth tooth being behind the back edge of the zygomatic arch. 



Mr. Allen thinks that this is undoubtedly the 0. cinerea of Desma- 

 rest, from Peron ; but it is not the 0. cinerea of Quoy & Gaimard 

 (see obs. on Peron's Seal in the Cat. Seals & Whales, p. 57). 



Tribe V. EUMETOPTINA. 



Grinders 4 . 4, more or less far apart ; the hinder upper behind the 

 hinder edge of the zygomatic arch, and separated from the other 

 grinders by a concave space. 



Eumetopiina, Gray, Ann. $ Mag. N. H. 18G9, iv. p. 269. 



7. EUMETOPIAS. 



Eumetopias, Gill, Peters. 



Arctocephalus § a***, Gray, Cat. Seals Sf Wliales, p. 51. 



Fur without any under-fur. Palate flattish or rather concave in 

 front, as wide in front as at the end of the tooth-line, and then 

 slightly narrowed behind. Posterior nares oblong, elongate, broadly 

 truncated in front, the front edge being behind the line of the orbital 

 process of the zygomatic arch. The grinders have large oblong 

 roots ; the second, third, and fourth upper ones have a subcentral 

 longitudinal groove on the outer side, and a less marked one on their 

 inner surface ; the inner side of all but the first of the lower ones 

 are similarly grooved ; the fifth upper grinder (or, more properly, the 

 sixth in the normal series) has two distinct roots. The lower jaw 

 much more elongate than that of Otaria jubata, the hinder angle 

 more oblique, and the lower margin long and straight. Flap of toes 

 short. 



The skull of the young animal, which was sent by Mr. A. S. 

 Taylor to Mr. Gurney from California, and which I first described, 

 with doubt, as Arctocephalus monteriensis, junior (P. Z. S. 1859, 

 p. 357), and which in the ' Catalogue of Seals and "Whales ' I named 

 A. californianus (see p. 51), agrees in every respect in its dentition 

 with the large skull which we received from California, and which 

 I described and figured as A. monteriensis (P. Z. S. 1859, p. 358, 

 t. 72) ; but it differs greatly in the form of the hinder nares, which 

 are extended much more forwards, so that the front end, which is 

 very narrow and acute, is much in front of the prominence of the 

 orbit of the zygomatic arch, being, in fact, about in a line with the 

 middle of the lower edge of the orbital cavity. 



This skull is evidently that of a very young animal ; for the bones 

 are separate ; but it has the same number and disposition of the teeth 

 as the large skull. There is the same wide space between the fourth 

 and fifth upper grinders ; but there is at the back edge of the fourth 

 grinder, on the right side of the skull, a small pit, from which, no 



