68 H. B. Ferris, M.D. 



est excess of span is 102 and the greatest excess of stature 

 99 mm., and the females (201) show a greater range variation 

 than the male (146). 



„, , , . , /span X ioo\ . r 



The span-stature mdex ( — — 1 gives an average 01 100. 



for the male and 99.9 for the females. This index shows in 

 another way the relation of the stature to the span which has 

 already been illustrated in the discussion of the excess of span 

 over height. The male Quichua shows an index somewhat 

 greater (102.3) than the Machiganga, and of the various races 

 only the Polar Eskimo (99.3) and the Colorado Indian seem to 

 have as low an index as the Machiganga. 



The seriation table shows that 44.4% of male Machigangas 

 have an index between 100.5 and 102., while only 13.3% of the 

 females are found here, 46.6% being betw^een 98.5 and 100. 



Sitting Height. 



The average sitting height in the male is 78.1 mm., the 

 extremes 857 and 676, and the variation range is 181. In the 

 females the average sitting height is 742, the extremes 845 and 

 696, and the variation range 149. 



Both the sitting height and the variation range are less in the 

 female than in the male and the range in the male varies more 

 than that of the stature, contrary to what is usually true. In 

 the Quichua the variation range in the stature was greater in 

 both sexes and due to the fact that the leng-th of the lower 

 extremities is more variable than the body length. 



In the male the stature-sitting height index averages 50.09, 

 the greatest 52.67, the least 43.73, and the variation range 8.94. 

 In the female the average is 51.79, the extremes 66.09 and 47.15, 

 and the variation range 18.9. The variation range is large in the 

 male and surprisingly larger in the female, as compared with the 

 Quichua and other races in which, while the average index is 

 regularly higher in the female, the variation range is less. The 

 Machigangas have a lower index than most races, i. e., their 

 bodies are short and legs long. Hrdlicka gives the average for 

 20 American negroes as 51.4. No senile cases were measured. 

 There were no measurements taken of the arm, forearm, leg or 

 thigh. 



