1210 



THE ORGANS OF DIGESTION 



indicated is included in it; the range of size is between three and one-half and four 

 and one-half inches. 



- > ''"" "^ ' 



FIG. 921 View of teeth in situ, with the external plates of the alveolar processes removed. (Cryer.) 



Owing to the smaller sizes of the lower incisors, the teeth of the mandible are 

 .each one-half a tooth in advance of its upper fellow, so that each tooth of the dental 



FIG. 922. Front and side views of the teeth and jaws. (Cryer.) 



.series has two antagonists, with the exception of the lower central incisors and 

 .upper third molars (Figs. 921 and 922). 



