HOOKER'S SEA-LION. 63 



The formula for the milk dentition in this species is probably as follows : — 



i3_zz|, c^^nA, PC ^-4 



2—2' 1 — 1' 4-4' 



The formula for the two adult females in the ' Discovery ' collection is in each 



case : — 



T 3 — 3 ,,1 — 1 „^,4 — 4 ,,2 — 2 



I H S, C ;, ;, PM ■; 7, M 



2 — 2' "-1-1' " "'" 4 — 4' 1 — 1 



The skin of one of the females (No. 31) measures G8 inches from nose to tip of 

 tail. The length of the fore flipper is ISj inches, the length of the hind flipper 

 ISg inches. The colouring is a uniform bufi", or creamy grey, very slightly darker and 

 greyer dorsally owing to the fact that the basal two-thirds of every hair are black and 

 only the terminal third is buff, whereas in the lateral and ventral areas the hairs are 

 completely buff. 



The fore limb of this adult female carries five minute and rudimentary 

 nails. The naked dorsal palmation is carried 4j inches beyond the position of 

 the nail in the first digit, 2 inches beyond that of the second digit, 1 inch 

 beyond that of the third, and g inch beyond that of the fourth and fifth. The 

 palmar surface is devoid of hair over its whole extent, forming a sole 12 inches 

 in length and 4^ inches across the base. The radial border of the limb is also 

 devoid of hair on the dorsal surface. In the hind limb, nails 30 mm. in length 

 are developed on the three central digits, while the first and fifth are provided 

 only with rudimentary suggestions. Beyond the position of the nail on the 

 dorsal surface of the first digit is a naked palmation of 13 cm. in length and 4 cm. in 

 width. Beyond the nail insertion in the second digit there is a j)ahnation 10 cm. long, 

 in the third 9 cm., in the fourth 9 cm., and in the fifth 9 cm., but the width of the fifth, 

 2 cm., is just double as much as the width of the second, third or fourth. The palmar 

 naked sole of the hind limb extends to within 2^ inches of the root of the tail, and 

 measures 13 inches by 4 inches at its widest part. The same features and the same 

 proportions hold good also for the limbs of the young, in which the distribution 

 of hair and naked skin is precisely the same as in the adult females. The nostrils 

 of the adult female are 22 mm. in length, and the hair-covered space between the 

 nostrils and the upper lip is 22 mm. As in most seals, the hair immediately adjoining 

 the lip is a darker chestnut red, and of a longer softer character in this seal, especially 

 along the lower lip. It is the only part of the adult that retains the chestnut red 

 colour characterising the new-born young. 



The females on the sandy beach of Enderby Island were divided into parties which 

 were collected around the older rough-haired males. The old males have a far coarser 

 and darker hair than the younger males and the females, and have also a very thick 

 crisped blackish brown mane, which clothes the whole of the enormously muscular neck. 

 In the younger males one sees innumerable scars upon the neck, but these are not 

 visible under the crisped mane of the larger males. The mane, no doubt, is developed 

 largely as a protection in the fights that constantly occur between them. While 



