MAMMALIA 



279 



Like many other creatures in the north the weasel changes 

 from brown to white in winter. The source of the white 

 ermine is the stoat or ermine occupying the northern part 

 of both hemispheres. 



The bears ( Ursidce) are represented in our country by 

 four species, of which the black bear ( Ursus americanus) 

 has the widest range. It is found in many of the forests 



FIG. 316. The California sea lion (Zalophus calif omianus). Photographed in the 

 Philadelphia Zoological Gardens. 



from Florida to Alaska. The color varies frequently to a 

 brown in the western states, where it is called the cinnamon 

 bear. The large grizzly bear of the Rockies is said to have 

 killed and maimed more hunters than all the other bears 

 of the world combined. The polar bear inhabits the coast 

 of the Arctic Ocean, where it feeds upon fish and seals. 



The Pinnipedia include those carnivora whose limbs are 

 adapted for swimming. They are the sea lions, seals, and 

 walruses. The large canines forming the long ivory tusks 

 in the upper jaw distinguish the walrus from the other two 



