200 PHILOSOPHY OF ZOOLOGY. 



cipal hoofs arranged so as to make the foot bifid, the la- 

 teral hoofs, where such exist, being useless as supporters 

 of the body. In the others the hoofs are irregular, and 

 xhe foot is not bifid. 



A. Foot bifid. 



a. Tusks produced. Six incisors in the lower jaw. Sue- 

 sidse. 



With a tail. 



104. Sus. — Hog. Six incisors above. Grinders simple, 

 with tubercular summits. Tusks prismatic. 



105. Phacocherus. Two incisors in the upper jaw. 

 Grinders formed by the union of cylindrical pieces, united 

 by cement. Tusks rounded. A fleshy lobe under each 

 eye. Sus JEihicypicHS *. 



Without a tail. 



106. DicoTYLEs. Peccary. Incisors and grinders like 

 the hog. The tusks do not protrude beyond the mouth. 

 In the back of the loins, there is a scent-bag with a small 

 orifice which pours out a fetid odour. They have a ca- 

 non bone like the ox. Stomach divided into pouches. 

 The two species are natives of South America. 



h. Tusks short. The three kinds of teeth forming an 

 uninterrupted line, as in Man. 



107. Anoplotherium. Six incisors in each jaw. Twen- 

 ty-eight grinders in all. No canon bone. This is an ex- 

 tinct genus. The remains of five species have been deter- 

 mined by Cuvier, from the gypsum quarries in the neigh- 

 bourhood of Paris. 



• The structure of the teeth of this species is well displayed by Sir E. 

 Home, Comp. Anat. II. Tab. xxxviii. xxxix. That of the wild-boar, 

 Tab. xxvii. 



