14 OTARIAD^. 



He observes, " the whole of the palate is much nan'ower than in 

 the male of the same size, especially in the maxillary region, and 

 the teeth are much weaker and more sharply pointed." 



He observes, '* The young of both sexes are alike of a dark brown 

 or very deep chocolate colour. The males about a year old retain 

 somewhat of the chocolate tint of their youth, which, however, is 

 paler, and subsequently changes annually as the coat is shed. The 

 females of equal age assume a dark grey hue dorsally, while the 

 abdominal parts are light yellowish. As they grow older they alter 

 little. 



'^ Males a couple of years old or more become of a rich brown shade 

 on the back and sides, and lighter or yellowish beneath. Old males 

 alone are maned. 



" There is a sparse underwool on the young, which sensibly di- 

 minishes with age. 



" The skulls of the adult male and female differ considerably, the 

 latter being comparatively the narrower of the two — the former pos- 

 sessing a somewhat different form of teeth, besides proportionally 

 immense canines. 



" The teeth of Otaria jubata are subject occasionally to a peculiar 

 wearing, of a median constricted character. 



" Between the female and male of this species there is a wide 

 difference as regards the stretch of the pectoral flippers. In the 

 skin of the male the breadth from tip to tip of the fore flippers is 

 equal to or greater than the length of the body ; in the female the 

 reverse obtains. This fact points to greater strength and swimming- 

 power of the former." 



Sect. n. The palate rather produced behind. The front edge of the hinder 

 nasal opening in a line with the middle of the zygomatic arch. Sea-bears. 



Tribe II. CALLORHININA. 



Grinders | . |. Skull oblong ; face broad, shorter than the orbit ; 

 forehead arched. See Cat. S. & W. p. 45, f. 16 (skull). 



Callorhinina, Grayy Ann. ^ Mag. N. H. 1869, vol. iv. p. 269. 



2. CALLORHINUS. 



Skull elongate ; forehead rounded in front of the orbit, rather 

 swollen. Palate rather concave, as wide in front as at the end of 

 the tooth-line, rather narrowed behind. The sixth upper grinder 

 just behind the hinder edge of the zygomatic arch; the grinders mo- 

 derate, fifth and sixth upper and the fifth lower with two diverging 

 roots. Front flapper small, narrow. Flap of toes very long. 



Callorhinus, Gray, P. Z. S. 1859, p. 359 -, Annals Sf Mag. N. H. 1866, 



vol. xviii. p. 234; Cat. S. Sf W. p. 44, f. 16 (skull); Peters. 

 Arctocephalus, Gill\ 



