354 
COMPARATIVE ZOOLOGY. 
Fig. 347.—Wolf (Lupus occidental™). 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 
Fig. 349 —Red Fox (Vulpes.fulous). United States. claWS 181 Tile body 
is covered with abundant hair. 
Carnivores are divided according to the modifications 
of the limbs: a. Pinnigrades , having short feet expanded 
Fig. 34S.—Ermine-weasel (Putorius Noveboracensis). 
United States. 
