140 



THE MAMMALIA. 



blance to those of the Carnivora. They are adapted 

 not only for chewing but 

 for crunching food. Their 

 dentition is, in fact, that 

 of an animal living upon a 

 mixed form of food one of 

 the Omnivora. 



In the structure of its 

 foot the Pig is very closely 

 allied to the Peccary, which 

 we have already mentioned 

 as an example of the so- 

 called adaptive animal form. 

 However, the Peccary has 

 advanced farther in the 

 adaptation of its tarsal hones 

 to the two principal toes 

 than the Pig, in whose case 

 both the second and the fifth 

 toe still almost wholly claim 

 the support of the carpals, 

 without thereby accomplish- 

 ing anything particular in 

 the way of standing and 

 running. From the relation 



between the carpals and metacarpals it is evident 



FIG. 16. Eight Fore-foot 

 of the Pig. 



