THE TEETH OF ARTIODACTYLE UNGULATA. 337 



premolar teeth are of decidedly simpler form than the 

 molars ; indeed in the ruminants the premolars may be 

 said each to correspond to one half of a true molar. 



The dentition of the ordinary ruminant having been 

 more or less illustrated by the example of the musk deer 

 (minus its great canines), the Camel may be selected as 

 illustrating the peculiarities of the molar series. 



The Camel is possessed of an upper incisor, and, as has 

 already been noticed, of canines. 



The first two pairs of upper incisors are absent, but the 



FIG. 145 I 1 ). 



third or outermost pair are present, and are rather caniniforni 

 in shape. In quite young skulls six upper incisors are present, 

 but the two inner pairs are lost very early. The canines are 

 strong pointed teeth, and the lower canine stands well apart 

 from the three incisors of the lower jaw, unlike the fourth 

 tooth in front of the mandible of typical pecora (see Fig. 

 115). 



(*) Upper and lower teeth of a Camel. 



