450 



BEAN. 



The average relative aiin length is 44.3 for the dolichocephalic, 44.2 for the 

 brachycephalio, and 43.9 for the meaocephalic. In groups above 45.5 there are 21.4 

 per cent dolichocephalic, 21 per cent brachycephalie, and 14.2 per cent mesocephalic. 

 In groups below 43.0 there are 14.2 dolichocephalic, 26.3 brachycephalie, and 31 

 mesocephalic. 



The dolichocephalic have relatively longer arms than the mesocephalic, 

 while the hrachyeephalic have an intermediate relative arm length. 



Correlation of stature and relative arm length (per cent). 



Stature. 



Below 

 43.0 centi- 

 meters. 



43.0 to 

 45.5 centi- 

 meters. 



Above 

 45.5 centi- 

 meters. 



Above 160 centimeters 



9 

 23.3 

 38 



82 



53.4 



47.6 



9 

 23.3 



14.4 



l.'iO to 160 centimeters - - 







There is a progressive increase of relatively short arms (below 43) 

 from absolute tallness to absolute smallness, and a progressive increase 

 of arms of relatively intennediate length (43 to 45.5) in the opposite 

 direction, while the number of long arms (above 45.5) increases from 

 tallness, through smallness, to medium size in stature. Continuing the 

 analysis of cephalic index combined with stature and relative ann 

 length a table is presented as follows: 



Analysis of cephalic index corabined with stature and relative arm length 



[per cent). 



stature and group. 



Below 

 43 centi- 

 meter. 



Above 160 centimeters: 

 Dolichocephalic--, 



Mesocephalic 



Brachycephalie — 



150 to 160 centimeters: 

 Dolichocephalic— 



Mesocephalic 



Brachycephalie 



Below 150 centimeters: 

 Dolichocephalic-.- 



Mesocephalic 



Brachycephalie 







12.5 

 20.0 



14.8 

 30.4 

 30.0 



33.3 

 50.0 

 20.0 



43.0 to 

 45.5 centi- 

 meters. 



Above 



4o.5centi- 



meters. 



100.0 

 62.5 

 80.0 



55.6 

 56.6 

 40.0 



.30.0 

 40.0 

 60.0 



0.0 

 25.0 

 0.0 



29.6 

 13.0 

 30.0 



16.6 

 10.0 

 20.0 



The Igorots may be divided into four groups by the above correlations : 



1. Tall dolichocephalic Igorots with long arms. 



2. Small dolichocephalic Igorots with short arms. 



3. Mixed mesocephalic Igorots. 



4. Brachycephalie Igorots with intermediate arm length. 



The correlations and differences suggest that three steps of racial 

 mixture preceded present conditions. First, a small dolichocephalic 



