LENGTH-BREADTH INDEX. 7 



expect it to come at 75, which is the average of the indices. It is noticeable that the 

 extremes for the female tend more toward the brachycephalic than the dolichocephalic end 

 of the figures, while the males are the reverse. The males have a very clearly defined mode 

 at 75. These same conclusions are reached from a study of the table given here (Table I). 

 The fact that there are no skulls under the class hyperbrachycephalic is significant. 



TABLE I. 

 Length-Breadth Indices. 



In the Czechs, a good type of broad heads, the modes of the frequency curves of the 

 leng-th-breadth indices for the males and females lie at 79 and 83 and the range of variation 

 is from 73 to 94, figure 3. 



LENGTH-BREADTH INDICES. 

 CZECHS. 



% 

 /6 



/3 



// 



9 



7 



6 



3 



73 76 77 79 8/ 63 S5 <37 <39 9/ 93 /n&/ce^. 



Males 294 



-■ — Females i6o 



Fig. 3 



