THE BENGUBT IGOROTS. 



449 



and there is no reason to belieye that natural selection would aifect it. 

 For the same reasons this feature should be one of the best marks to 

 determine racial purity. 



The ear marks of a people may be significant. 



COBEELATIONS. 



The correlation of cephalic index and stature is determined by averages 

 and percentages. The average stature of the dolichocephalic Igorots is 

 157.1 centimeters, that of the mesocephalic is 155.2, whereas the stature 

 of the brachycephalic is only 152.2 centimeters. 



Correlation of cephalic index and stature (per cent). 



Index. 



Dolichocephalic 



Mesocephalic 



Brachycephalic 



below 

 150 centi- 

 meters. 



16.6 

 20.0 

 31.8 



stature Stature i 

 l.'iO to 160 above 160 

 centi- centi- | 

 meters. meters. 



64.3 i 

 62.5 ' 

 54.5 I 



19.1 

 17.5 

 13.7 



There is a greater proportion of comparatively tall individuals among 

 the dolichocephalic Igorots, and a greater of small individuals among 

 the brachycephalic than among the mesocephalic, but the difference 

 between the mesocephalic and brachycephalic is greater than that between 

 the mesocephalic and dolichocephalic. A larger per cent of each index 

 is found between 150 and 160 centimeters, which is to be expected in a 

 much mixed, endogamous people. However, it is in the extremes that 

 aboriginal types are to be searched for, and it is the extremes where the 

 differences are greatest. 



The correlation of cephalic index and relati'^e arm length is not so 

 great as the correlation of cephalic index and height, but it is in the 

 same direction. The long head and the tall height are parallel and so 

 are the long head and the relatively long arm. However, the correlation 

 is slight. 



Gorrelaiion of cephalic index and relative arm length (per cent). 



Gi roups. 



Below 

 43.0 centi- 

 meters. 



Dolichocephalic 

 Brachycephalic 

 Mesocephalic— 



Between 



43.0 and 



45.5centi- 



meters. 



14.2 

 26.3 

 31.0 



Above 



45.5centi- 



meters. 



64.4 

 52.3 

 .54.8 



21.4 

 21.0 

 14.2 



