332 Dr. J. E. Gray on the Skulls of Sea-Bears 



In the 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. 



4. Arctophoca, Peters. 



Dr. Peters described this subgenus from a specimen sent 

 from Chili by Dr. Philippi. It chiefly differs from Zalophus in 

 the palate being much narrower, but rather wider behind, and 

 the teeth rather far apart. 1 have not seen any skull agreeing 

 with these characters. 



Arctophoca Philippii, Peters, Monatsb. 1866, p. 276, 

 t. 2 A, B, c (skull and teeth). 



Hab. Juan Fernandez. Dr. Philippi, Mus. Berlin. 



According to the figures, the form of the skull and the large 

 size of the orbit are very similar to those of Phocarctos Hookeri ; 

 but the number and form of the teeth are different. 



B. The grinders bib, the third upper being under the front edge of the 

 orbit, the last or fifth separated from the rest by a broad space and 

 placed far behind the back edge of the zygomatic arch j the hinder 

 grinders two-rooted. 



5. EuMETOPiAs, Gill, Peters. 

 Arctocephalus § a***, Gray, Cat. Seals & Whales, p. 51. 



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 longitu- 

 dinal 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. 



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

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

 scribed, with doubt, as A. Monteriensis, junior (P. Z. S. 1859, 

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

 named Arctocephalus Califomianus (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. Mon- 

 teriensis (P. Z. S. 1859, p. 358, t. 72) ; but it differs greatly in 



