FACE AND HEAD. 



43 



with the front aspect of the face ? The reply is, a 

 great deal, but you are Dot asked to take this bare 

 assertion on trust. It is of the highest importance 

 that you should understand the conditions requisite 

 for the ' grinders' to have large, flat, and regular 

 masticating surfaces. But you will have to follow 

 the description, as you did in the case of the ej^e, 

 before you can understand. 



The molar teeth or grinders (Fig. 6, ^ 11) are 



FIG. 6. 



