SEA-LIONS, AND SEA-BEARS. 29 



1484 a. Skull of young. (PI. XVIII.) 



Gypsophoca tropicalis, Oray, P. Z. S. 1872, p. 660, figs. 5, 6. 

 North Australia {Macgillivray). 53. 10. 22. 3. 



Presented by the Admiralty. 



Skull broad behind, tapering in front ; front part one third longer 



from the condyle than from the condyle to the occiput. PaLite 



narrow ; 5th and 6th upper hinder grinders quite behind the hinder 



edge of the zygomatic arch. Under-fur abundant. 



Animal, stuffed. 



1484 6. The lower jaw and front of upper jaw, young. 



North Australia {Macgillivray). Presented by the Admiralty. 



B. The grinders g-^g ; the sixth upper behind the front edge of the zygo- 

 matic arch ; the fifth is even with it, htd this tooth is sometimes rudi- 

 mentary and falls out early in life, leaving a space between the fourth 

 and sixth teeth. 



Tribes. AECTOCEPHALINA. 



ArctocephaUna and Callorhinina, Oray, Suppl. Cat. Seals 8f Whales, 

 pp. 14, 15. 



In the very young Eumetopias there is a hole for the rudimen- 

 tary fifth tooth on one side. In the adult skull there is a space 

 between the fourth and sixth teeth. In the young skull of Phoc- 

 arctos elonr/atus from Japan this tooth is perfectly developed; but 

 it is absent on both sides in the adult, leaving a vacant space. 



* Head elongate ; face produced, 



3. PHOCAECTOS, Gray, Suppl. Cat. Seals 6f Whales, p. 15. 



Skull elongate, front part much longer than twice the length of 

 the hinder part of the skuU to the condyle. Palate very deep, much 

 wider in the middle. Under-fur sparse. 



Grinders : 5th and 6th hinder upper quite behind the hinder edge 

 of the zygomatic arch. 



1. Phocaectos Hoojkeei, Gray, Suppl. Cat. Seals ^ Whales, p. 15. 



Arctocephalus Hookeri, Oray, Cat. Seals 8,- TVJiales, p. 53, p. 44. 



f. 15 ; Cat. Mam. B. M., Seals, p. 31, f. 14 (bones of teet). 

 Otaria Hookeri, ClarJc, P. Z. S. 1873, p. 754, fig. (skull, adult male) 

 Arctoceuhalus falklandicus, Burmeister, Ann. Sr Mag. Nat. Hist. 



1866/xviii. t. 9. figs. 1-4 (skull). 

 Otaria jubata, Allen. 



Animal, stuffed, adult female. 



Arctocephalus Hookeri, Gray, Voy. Erebiis ^ Terror, pi. xiv. 

 336 c. SkuU of above, broken. 



Antarctic seas {from the Antarctic Expedition). 



Presented by the Admiralty. 



