Fip. 8 show? the spheno-maxillary angle (B-Pr-P) of Xo. 1 .'■kull compared 

 with that of a modern Canadian skull fhetween the dotted lines) which was 

 75°. The Fip. illustrates the effect which a reduction in the size ef this 

 angle has in producing the orthognathous type of cranium. 





Fip. 9. Profile view of the masks. (No 2 to tlio left, Nc 1 to the rijiht). 



