354 



COMPARATIVE ZOOLOGY. 



Fig. 347.— Wolf {Lupus occidentalis). United States. 



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 

 are numerousbony 

 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 

 developed, the 

 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 

 claws. 181 The body 



Fig. 348.— Ermine-weasel (Putorius Noveboracensis). 

 United States. 



Fig. 349. —Red Fox ( Vulpes fulvus) . United States. 



is covered with abundant hair. 



Carnivores are divided according to the modifications 

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



