351 



COMPARATIVE ZOOLOGY. 



six in each jaw. There are always two sets. The 

 skull is comparatively small, the jaws are shorter and 



deeper than in Un- 

 gulates, and there 

 arenumerousbony 

 ridges on the in- 

 side and outside 

 of the cranium 

 the high occipital 

 crest being special- 

 ly characteristic. 

 The cerebral hem- 

 ispheres are joined 

 by a large corpus 

 callosum, but the 

 cerebellum is nev- 

 er completely cov- 

 ered. Both pairs 

 of limbs are well 



FIG. 348.-Ermine-weasel (Putorius Xatebaraeauit). developed, the 

 United States. 



front being pre- 

 hensile; but the 

 clavicles are rudi- 

 mentary. The hu- 

 merus and femur 

 are mainly en- 

 closed in the body. 

 The digits, never 

 less than four, al- 

 ways have sharp 

 and pointed 



FIG. 349 RedFox.(Vtdpe8fulous). United States. claWS. 161 The body 



is covered with abundant hair. 



Carnivores are divided according to the modifications 

 of the limbs : a. Pinnigrades, having short feet expanded 



FIG. 347. Wolf (Lupus occidentalis). United States. 



