428 FOUR-FOOTED AMEBIC AN S 



the limbs looking like feet joined to the body without legs. 

 They are covered all over with stiff hair, and in some species 

 there is a soft under-fur, which is the familiar "sealskin" 

 of commerce. This is wrongly named, as it is the pelt of the 

 Sea Bear, and not of a true Seal. Male much larger than 

 the female. 



Sea Bear, Fur Seal . . Callotaria ursina. 



Length of male, 7-J feet ; female, 4J feet. 



Sea Lion .... .... Zaiophus californicus. 



Length of male, 15 feet ; female, 8-9 feet. 



Walkus Family 

 OdobenidEB 



(Numter of North American Species, Two) 



Walrus is a word adapted from the Eussian, meaning 

 Whale Horse. Animals of Arctic seas, measuring 10-13 feet 

 from nose to rump. Bulky and thick, heaviest about shoul- 

 ders, and sloping toward the rump. Thick, wrinkled skin 

 covered with rough, yellowish hair which wears almost en- 

 tirely off when the animal is old. They have a pair of long 

 tusks which aid in fighting, climbing, and digging their shell- 

 fish food. The ^Valrus is of commercial value on account 

 of its oil, hide, and tusks. 



Atlantic Walrus Odobenus rosmarus. 



Length, 12 feet 3 inches. 

 Pacific Walrus Odobenus obesus. 



Length, 12-14 feet. 



Family of True Seals 

 Phocidae 



(Number of North American Species, Nine) 



The true Seal is the most water-loving of the group. Its 

 hind flippers drag uselessly when on land, where it moves 



