FOSSIL REMAINS OF MAN. 



175 



gitudinallj and vertically, through the middle. The sec- 

 tional diagrams then have been superimposed, in such a 

 manner, that the basal axes of the skulls coincide by their 

 anterior ends and in their direction. The deviations of 

 the rest of the contours (which represent the interior of 



Fig. 30. — Sections of orthognathous (light contour) and prognathous (dark 

 contour) skulls, one-third of the natural size, a b, Basicranial axis ; b c, 6'c', 

 plane of the occipital foramen ; d d\ hinder end of the palatine bone ; e e\ 

 front end of the upper jaw ; TT, insertion of the tentorium. 



