MAMMALIAN GALLERY. 
22 
Northern Fur-Seal {Callorhinus urshms), (S and 2 ; after Elliot. 
all Eared Seals seem to be polygamous. Of the numerous species, 
one of the most worthy of mention is the Fur-Seal {Callorhinus 
ursinus), of the North Pacific, from which most of the seal- 
skins sold are obtained. It may be observed that the coats of the 
stuffed specimens do not show any resemblance to the “ seal-skin of 
the trade; in the latter only the soft under-fur of immature and female 
specimens is preserved, all the long coarse hairs having been 
removed. 
Intermediate in many respects between the Eared and True 
Seals are the Trichechidcey containing but a single species, Triche- 
ckus rosmarus, the Walrus, which lacks external ears, but uses 
its hind limbs after the manner of the Eared Seals. In one 
respect, however, it is quite unique — namely, in its possession of 
enormously long and powerful canine teeth, or “ tusks, which 
project downwards far below the lower jaw, and are used for fight- 
ing, for climbing from the water on to the ice, and for digging on 
the sea-bottom for the shell-fish and crustaceans on which this 
species chiefly lives. Its range extends all round the North Pole, 
along the edges of the ice-fields. 
In the Phocidce, or True Seals, the adaptation for an aquatic 
