IO2 



Vertebrata. 



water lakes as in Lake Baikal. Our common seal is 

 inoffensive and easily tamed. The walrus, known by 

 its huge tusks or canine teeth, used for digging up 

 the molluscs on which it feeds, sometimes reaches 

 twenty feet in length. The fur seals, whose beautiful 

 sk ns are of such commercial importance, are natives 

 of the Southern Atlantic and Pacific Oceans. The 

 dentition of the common seal is 



/ 3=3 C- 1 ^ 1 , ^3=3 j/3zi3. 



2 - 2 I - 1 3 - 3 2 - 2 



63. Order 9, Carnivora, The flesh-eating mam- 

 mals are the cats, dogs, weasels and bears, known by 

 possessing sharp claws, long pointed canine teeth, a 

 simple stomach, and a short intestine. The lower 

 jaw is constructed to move only in the vertical plane 

 up and down, having no lateral motion, the condyle 



FIG. 49. 



Skull of lion. 

 7, median temporal crest ; 12, post- orbital process ; 15, nasal bone. 



being transversely lengthened. The molar teeth are 

 ridged and sharp, so as to be fitted for dividing flesh. 



