MEMOIKS OF THE NATIONAL ACADEMY OF SCIENCES. 

 TABLE II. Ordination of 18 cephalic indices. Salado. 



243 



Variation, 19 57. Theoretical mean of variation, 88.19. Skull nearest to mean, H. 8. Aver 

 age, 88.47. 



TABLE III. Seriation of 48 cephalic indicen. Salado. 



Maximum of frequency, 90. 



TABLE IV. Ordination of 16 cephalic indices of apparently normal skulls. Salado. 



40. 



Variation, 16.20. Theoretical mean of variation, 80.53. Skulls nearest to mean, H. 7 and H. 



Average, 80.94. 



No. H. 55, an apparently normal skull, of which the vault only is preserved, has a normal 

 index of 78.72, but it is aberrant as regards the rest of the group by reason of its much greater 

 size and different configuration. 



No. II. 23, having lowest cephalic index, has next to lowest vertico- trans verse index. The 

 lowest vertico-transverse index is in the skull of a child. 



