180 COMPAEATIVE DENTAL ANATOMY 



human forms of the teeth are gradually ap- 

 proached in advancing from the lower to the high- 

 est species. The upper central incisors gradually 

 become wider and the laterals narrower. The 

 lower incisors become narrower, and are less thick 

 and heavy. The canines remain strong and pow- 

 erful, but are reduced in some species. The 



Fig. 76. — Teeth of Old-world Baboon (Cynocephalus porcarius). 



Mandrills have these dental weapons most for- 

 midable for their size and shape, and the uppers 

 descend behind the lower canines against the edge 

 of the lower first premolar, which is raised to 

 meet them. This is a marked peculiarity of the 

 Baboons (Fig. 76). A large diastema separates 

 the upper canine from the incisors, into which the 

 sharp lower canine closes. The premolars gradu- 



