hruucka] 



PllVSIOr>()GI('AL AND MKDTCAL OBS^ERVATIONS 



121 



Grou'th of fare, by staturr groups — Contimuxl 



The forogoing iiieasurenients demonstrate, as do those of the head, 

 gradual growth of the face among both the Apache and the Pima, 

 without much irregularity in both principal dimensions, up to a fully 

 adult age. 



Except in the 3'oungest cliildreii, the Apache face is somewhat 

 lower and especially broader than the Pima face, characteristics which 

 agree with the difference in the length and the breadth of the head 

 in the two tribes. 



In most of the groups of the children both dimensions of the face 

 in males are greater than in the females, but the differences are 

 slight — much slighter than in adults. It is seen from the figures 

 in the foregoing table that, in the two tribes under discussion, the 

 growth of the face in the males continues longer than that of the 

 stature, though perhaps not beyond the age at which it ceases in the 

 females. 



An interesting comparison is that between the cephalic and the 

 facial index "■ during the growth period. The cephalic index in the 

 males decreases slightly with age, but not in the females; the facial 

 index in both sexes increases with age, in all probability by reason 

 of the growth of the alveolar processes and teeth, the face becoming 

 relatively higher with the increase in stature. As to sex differences, 

 the cephalic index, on account of the development of the frontal 

 sinuses, becomes eventually lower in the males, while the facial index, 

 on account of the greater development in the males of the lower 

 jaw, becomes liigher in this sex in adolescence (for graphic illustra- 

 tion, see pi. xx). 



o Cephalic indpx= 



Facial index= 



diam. lateral max. of headXlOO. 

 diam. ant. post. max. 

 facial height X 100 



diam. bizygomatic max. 



