Machiganga Indians of the San Miguel Valley 69 



Hands. 



The length of the hand is measured from the midpoint of a line 

 tangent to the proximal edge of the thenar and hypothenar 

 eminences to the tip of the middle finger. The breadth is the 

 greatest distance from the angle between the thumb and fore- 

 finger to the ulnar side of the hand at right angles to the line 

 representing the length. The left hand only was measured, in 

 18 males and 15 females. 



The length of the hand averages in the male 164, the extremes 

 are 183 and 151, and the range of variation 32. In the female 

 the average length is 155, the extremes 168 and 142, and the 

 variation range is 26. 



The breadth of the hand in the male averages 81, the extremes 

 are 90 and 74, and the variation range 16. In the female the 

 breadth averages 74, the extremes are 81 and 69, and the varia- 

 tion range 12. Thus the hand of the female is less in all dimen- 

 sions than that of the male, as is also the variation range. 



The hand of the Machiganga is smaller in both dimensions 

 than the hand of the Quichua (171 and 88). 



The hand index in the male averages 49.3. with extremes of 

 54.3 and 45.9, and a variation range of 8.4. In the females the 

 average is 47.4, the extremes are 50.7 and 44.8, and the variation 

 range 5.9. This index is somewhat larger in the Quichua (51.35 

 and 48.8 $ ) and is similarly smaller in the female than in the male. 

 T 4- R 



The hand module {--^ — ) averages in the male 12.3, in the 



female 11.5. 



The relative hand length to stature in the male averages 10.5. 

 with extremes of 11.5 and 9.5, and a variation range of 2. In the 

 female the average is 10.7, the extremes 12.3 and 10. i, and the 

 variation range 2.2. This is quite similar to the index of the 

 Quichua (10.8) in the male but much smaller than in the Quichua 

 female (12.5). 



Tables in sedation in the appendix indicate the distribution of 



these various measurements and indices. While the hand index 



is large in the male, the hand-stature index is smaller than in the 



female. 



Thorax. 



The chest measurements were made at the nipple level in 

 median expansion. The average lateral diameter in the male 



