34 ON THE FORM AND SIZE 



in the two sides of the same individual (Fig. 6). 



Fig. 6. 



Antnim differing in the size and elevation of the floor in the two sides {transverse seetion). 



Occasionally the antrum extends into the body 

 of the malar bone (Fig. 7), 



Antrum extending into the Malar hone {posterior view). 



