The Indians of Cuzco 45 



By the Lee-Pearson formula for determining the cranial 

 capacity in the living- from the length, breadth, and auricular 

 height of the cranium, (.000337 (l-n) (b-ii) (h-ii) -|- 

 406.01 i ) we obtain 1437.4 cc. for the average cranial capacity 

 in the male. From the formula (.000400 (l-ii) (b-ii) (h-ii) 

 4- 206.6$ ) we obtain an average cranial capacity for the female 

 of 1284.5. If we multiply the cranial capacity in cubic centi- 

 meters by .87 ( Manouvrier) we obtain an average brain weight 

 for the male of 1250.5 grams and 1117.5 grams for the female. 



Eaton's (3) study of the cranial capacity of old exhumed 

 Quichua skulls gave an average of 1181.7 cc. in the female (33) 

 and 1356.6 in the male (7). This is about 100 cc. less than was 

 found in the present living Quichua and probably represents the 

 imperfection of the formulary method of determining the cranial 

 capacity in the living rather than an increased cranial capacity. 



The Expedition of 1912 found the cranial capacity and brain 

 weight of the male Quichua somewhat less, viz., 1354 cc. for the 

 average cranial capacity and 11 78 grams for the average brain 

 weight (Lee-Pearson formula). The Quichua male is, there- 

 fore, mesocephalic and the female microcephalic. The dilTerence 

 in cranial capacity and brain weight in the male and female 

 Quichua is, however, quite similar to the sex difference in other 

 races. 



Summary. 



The measurements here recorded represent the Quichua of a 

 somewhat restricted region, viz., the provinces of Urubamba and 

 Convencion. Inasmuch as fewer measurements were made, some 

 of the data obtained by the former expedition cannot be further 

 tested or corroborated. Nineteen measurements were made on 

 85 males and 68 females and full face and profile photographs 

 were taken. 



Both congenital and acquired malformations were very few 

 and anomalies infrequent. Pockmarked individuals, however, 

 were numerous. Enlarged thyroids were frequent, 12.9% of 

 the males and 16.1'^/c of the females exhibiting this condition, 

 which seemed more prevalent in the regions w^here the drinking 

 water came from the glaciers and is occasioned by this water 

 according to the prevailing opinion among the natives. 



The pulse rate averaged 74 in the male and 78 in the female, 

 tne respiration rate 17.2 in the male and 17.9 in the female. 



