:;20 



COMPARATIVE ANATOMY 



jaw-bones, the upper incisors being situated in the premaxilke, the 

 upper canines and cheek-teeth in the maxilla', and the lower teeth 

 in the dentary. The canine, which corresponds to a specially 



/ 

 \ 



m 



7/1' 



FIG. 234, A. TEETH OF DOG (Canis familiaris). The teeth of both jaws from 

 the side, and those of the upper jaw from below. 



i, incisors ; c, canines ; pm, premolars: m, molars. 



ft m. 



FIG. 234, B. TEETH OF HEDGEHOG (Erinaceus europceu*). 



differentiated premolar and is most characteristically developed 

 in Carnivora, is approximated to the incisors and forms a more or 

 less continuous series with them. The premolars follow behind 



