74 H. B. Ferris, M.D. 



The base of the nasal septum is horizontal in 22.2% of the 

 males and 6.7% of the females, inclined up in 72% of the males 

 and 73.3% of the females ; inclined down in 5.6% of males and 

 20% of females. 



The nose of the male is higher, wider and more frequently 

 convex than that of the female, the nasal depression is equally 

 marked in the two sexes and the inclination of the base and nasal 

 index are about the same. 



Ear. 



The left ear only was measured, and the method of measure- 

 ment was the same as in the case of the Quichua. 



The average ear height in the male is 62, the extremes 71 and 

 55, and the range of variation 16. In the female the average is 

 59, the extremes 74 and 54, and the variation range 20. In the 

 male the breadth averages 38, the extremes are 49 and 34. and 

 the range of variation 16. In the female the average breadth is 

 36, the extremes are 39 and 33, and the range of variation 6. 



The ear of the female is smaller than that of the male in both 

 dimensions and also the extent of variability is less. The ear 

 of the Machiganga is very similar in its dimensions and form 

 to that of the Quichua. 



The height or physiognomic length of the ear varies racially 

 from 49.0 in the Hottentot to 75 in the Patagonian (Schwalbe), 

 and in the Machiganga is larger than in the negro (59.9 $ 

 Hrdlicka), smaller than in the North American Indian (67.6 $ 

 Hrdlicka), and about the same as in the Japanese, 62.0, and 

 Northern Chinese (61.0 5 Hrdlicka). 



The breadth is slightly greater than that of the American 

 negro (36.95 Hrdlicka) and almost the same as in the North 

 American Indian (38.7 5 Hrdlicka). 



The physiognomic ear index averages 61.86 in the male, the 

 extremes are 83.1 and 55.4, and the variation range 27.7. In the 

 female this index averages 60.7, the extremes are 67.3 and 45.9. 

 and the variation range is 21.4. As indicated by this index the 

 female ear is a little more slender than the ear of the male, as is 

 also true in the Quichua. where the index is very similar to that 

 of the Machiganga in both sexes. There is no mention of ear 

 anomalies. 



