i 



32 H. B. Ferris, M.D. 



extremes 109.6 and 85.9. and the variation range 23.7. The face 

 of the female Quichua then is relatively shorter than that of the 

 male and the index less variable. 



These results are much greater than those obtained by the 

 Expedition of 1912. where the average male index was 82.9, with 

 a maximum of 93.2 and a minimum of 70.6, and a variation range 

 of 22.6. As the bizygomatic breadth obtained by the two expe- 

 ditions is very similar the difference in results is due to the dif- 

 ference in the face height measurements, which probably 

 represents the glabella-menton height. This index varies racially 

 from 80 to 97.2, as given by various observers. 



An index of 82.9 associates the Quichua with some of the 

 North American Indians (80.5 Boas), while an index of 96.3 

 would be similar to that of certain hyperleptoprosopic groups of 

 Turkestan. 



The seriation tables show a nearly similar distribution of this 

 index in the two sexes : — 



Yale-Nat. Geog. Exp. Yale-Nat. Geog. Exp. 



1912 1915 



Quichua Quichua 



121 Males I Female 85 Males 67 Females 



Index per cent per cent per cent per cent 



(-83.9) Euryprosopic 55.4 100 



(84-87.9) Mesoprosopic 26.4 5.9? 13.4? 



(88-92.9) Leptoprosopic 17.4 25.9? 28.4? 



(93-) Hyperleptoprosopic 0.8 68.2? 58.2? 



It is clear from a comparison of the results of the two expe- 

 ditions in respect to the measurements of the face height and 

 •the grouping based thereon and from the inspection of the photo- 

 graphs and the results of observations on other races, that the 

 face height obtained by the last expedition is not the same 

 measurement as that made by the first expedition. The writer is 

 certain that the measurements obtained by the first expedition 

 represent the menton-nasion measurement while the face height 

 of the 191 5 Expedition probably approximates the menton- 

 glabellar height. 



T^i , . ...,., /bizygomatic diam. x ioo\ . 



the phvsiognomic facial index — ^-^ r-^ — ,^^r~ ) m the 



* - ^ V nienton-cnnion height / 



male averages 76.9, with extremes of 88.1 and 69.5. and a varia- 

 tion range of 18.6. In the female Quichua the average is 78.9, 

 with extremes of 89.5 and 71.2. and a variation range of 18.3. 

 The difference in this index due to sex is not marked, in some 

 instances being larger in the male and in others in the females. 

 The sex difference in the Quichua is greater, however, than in 

 most races. 



I 



