70 H. B. Ferris, M.D. 



is 275, with extremes of 306 and 256, and a range of variation 

 of 50.. In the female the average lateral diameter is 262, with 

 extremes of 278 and 242, and a range of variation of 36. The 

 antero-posterior diameter in the male gives an average of 218, 

 with extremes of 249 and 188, and a range of variation of 61. 

 In the female this diameter averages 208, with extremes of 244 

 and 186, and a variation range of 58. Both of these diameters 

 are greater in the Quichua who live in the mountains at a higher 

 altitude breathing more rarefied air. 



The thoracic index in the male averages 79.4, with extremes 

 of 85. and 71.2, and a variation range of 13.8. In the female 

 this index averages 79.3, with extremes of 92.5 and 69.8. and a 

 variation range of 22.7. This index is high in both sexes in 

 comparison with other races. 



Foot. 



The length and breadth of the left foot were taken by the 

 same methods as used in the case of the Quichua. The average 

 length for the male is 229, the extremes 245 and 216. and the 

 range of variation 29. In the female the length averages 206, 

 the extremes are 219 and 184, and the variation 35. The width 

 in the male averages 96, the extremes are 114 and 84, and the 

 variation range 30. In the female the width averages 85, the 

 extremes are 97 and 80, and the variation range 17. 



The dimensions of the female foot are distinctly less than those 

 of the male, the longest female foot is barely longer than the 

 shortest male foot and the foot dimensions are less in both sexes 

 than in the Quichua. 



The foot modulus [ j averages for the male 162 and for 



the female 145. 



The average foot index for the male is 41.8, the extremes are 

 48.5 and 36.2, with a variation range of 12.3. In the female the 

 index averages 41.05, with extremes of 44.3 and 38.5, and a 

 variation range of 5.8. 



The stature-foot index in the male averages 14.63. with 

 extremes of 15.5 and 13.9, and a variation range of 1.6. In the 

 female the average index is 14.34, with extremes of 16.0 and 

 13.2, and a range variation of 2.8. This shows that the foot is 

 relatively smaller in the female as well as absolutely and consti- 

 tutes a noteworthy secondary sex character. 



