HOLMES ANNIVERSARY VOLUME 



with the breadth of the face, but the correlation shows numerous ex- 

 ceptions. The diameter also differs in the two sexes, being absolutely 

 smaller in the female, but relatively to the facial breadth the dimen- 

 sion may be even slightly greater in the females than in males. This 

 happens among the Chippewa, but such a condition is not general 

 among Indians. Among the whites the jaw is perceptibly narrower 

 in relation to facial breadth in the females than in the males. 



BREADTH OF THE LOWER JAW 



(Diam. bigonial max.) Males Females 



Cm. Per cent Per cent 



IO.30-IO.5 . . 21 



IO.51-II.0 41 48 



II.01-II.5 6 31 



II.51-12.0 35 



I2.0I-I2.5 12 



12.51-12.6 6 



Average 11.51 cm. 10.88 cm. 



Minimum 10.60 cm. 10.30 cm. 



Maximum 12.60 cm. 11.40 cm. 



Indians of the Southwest 10.79 cm - 10.15 cm. 



Old-American whites 10.70 cm. 9.90 cm. 



Per cent of facial breadth 



Chippewa 76.0 76.4 



Indians of the Southwest 75.2 74.9 



Old-American whites 77.0 76.2 



An interesting and anthropologically significant relation is that 

 between the breadth of the lower jaw and the smallest breadth of the 

 forehead. As will be seen from the next table, the index of this relation 

 is decidedly lower among the Chippewa than among the Indians of 

 the Southwest, indicating a relatively broader jaw in the former; and 

 excepting the Chippewa females it is lower in both groups than it is 

 in whites, showing the jaw to be not only absolutely but also rela- 

 tively somewhat narrow in the latter group. In all three series the 

 index is higher in the females than in the males, demonstrating that 

 not only absolutely but also in relation to the forehead the female 

 jaw is the narrower. 



{ 



RELATION OF BREADTH OF FOREHEAD TO BREADTH OF LOWER JAW 



Dia m. frontal minim. X 100 ) 

 Diam. bigonial I 



Males Females 



Per cent Per cent 



80.I-85 ■■ 2 



85-I-90 29 14 



90.1-95 35 45 



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