TJie Indians of Cuzco 41 



Chervin 



Male Female 



(75) (8) 



Dolichocephalic 4.5 



Mesaticephalic 32.8 



Brachycephalic 62.7 



This shows a marked difference in the results of the two 

 expeditions in the percentages in the brachycephalic and mesati- 

 cephalic groups. This discrepancy is not so significant, how- 

 ever, when we note that the average cephalic index determined 

 by the two expeditions is nearly the same (80.7 and 79.9). The 

 explanation seems to be that a considerable proportion of cases 

 lie on the border line between the mesaticephalic and brachy- 

 cephalic groups and a slight difference increases markedly one 

 or the other group. 



Eaton (3) found in Quichua skulls exhumed at Machu Picchu, 

 of late pre-Columbian or early post-Columbian age, an average 

 cranial index of 78.5 in the male (11 individuals and 82.2 in the 

 female (43). This does not differ materially from the results 

 obtained for the living Quichua of the present time. 



Cephalic Module. 

 The cephalic module ( — — j represents better the size of 



the head than any single measurement. This module was deter- 

 mined for 85 males and 68 females. The average module in the 

 male is 15.7, the extremes 16.9 and 14.8, and the range of varia- 

 tion 2.1. In the female the module averages 15.2, the extremes 

 16.0 and 14.6, and the variation range 1.4. The head of the 

 Quichua female then, as indicated by the module, is smaller than 

 that of the male as is usual in other races, and the variation range 

 is less. This smaller variation in the cephalic module in the 

 female may be correlated largely with the smaller variation 

 range in the female stature as the size of the cranium varies 

 with stature, being larger in the taller. The average cephalic 

 module for the male as determined by the 191 2 Expedition was 

 15.4, as compared with 15.7 obtained by the last expedition. 



Eaton's (3) determinations for the cranial module of old 

 exhvuned Quichua skulls were 14.6 for the male (9) and 14.1 

 for the female (38). In both sexes the module is smaller than 



