VERTEBRATA: MAMMALIA. 7O/ 



The African Wart-hogs, forming the genus Phacochcerus, are 

 distinguished by having a fleshy wart under each eye. They 

 inhabit Abyssinia, the Guinea coast, and other parts of Africa. 

 The American Peccaries (Dicotyles) represent the Swine of 

 the Old World. They are singular for having only three toes 

 on the hind-foot, the outer of the two supplemental digits being 

 represented only by its metatarsal. The canines are not 

 exserted, there are only four upper incisors, and there is no 

 tail. They are exclusively confined to the American continent, 

 extending from Paraguay as far north as Texas and Arkansas, 

 and the commonest species is the Collared Peccary (Dicotyles 

 torquatus}. They are not at all unlike small pigs either in 

 their appearance or in their habits, and they are gregarious, 

 generally occurring in small flocks. 



Fam. 3. Anoplotherida. This group comprises extinct Artio- 

 dactyles which belong to the Eocene and Miocene periods, 

 and form a kind of transition between the Swine and the 

 Ruminants. In Anoplotherium itself (fig. 404) the body is 



Fig. ^..Anoplotherium commune. Eocene Tertiary, France. (After Cuvier.) 



slender, provided with a long tail, and having the feet termi- 

 nated by two toes each, sometimes with small accessory hoofs 

 in addition. The dentition is remarkable in the fact that no 

 gap or diastema exists between the molars and the canines, 

 the teeth thus forming an even and uninterrupted series. The 

 dental formula is 



i 3=3. ,1=1 ^4=4 3iz3 

 33 i i 44 33 



Fam. 4. Oreodontidcz. This family comprises extinct Artio- 

 dactyles from the Miocene and Pliocene Tertiary of North 

 America, which stand in some respects midway between the 



