CHARACTERISTICS OF THE EXTERNAL EAR 213 



diet, feeding the Hyper on concentrated nutrition, meat, eggs, 

 and milk, because the intestine is short, and feeding the Meso 

 on coarse bulky foods because the intestine is long. I may add 

 the results of measuring the intestine in the dissecting room dur- 

 ing the past two years (2). 



Fourteen subjects of the Hyper type have an average length 

 of 17.2 feet for the small intestine, the shortest 10 feet and the 

 longest 27; eleven subjects of the Meso type had an average 

 length of 23.3 feet for the small intestine, the shortest 16.3 feet 

 and the longest 29.5; and 27 subjects of the Meso-Hyper type 

 have an average length of 20.8 feet for the small intestine, the 

 shortest 16 feet, the longest 29 feet. Only one subject of the 

 Hypo type had the small intestine measured, and the length in 

 that one was 16.9 feet. The lengths are only approximate 

 because of difficulties in measuring, but the condition is evident 

 and the correlation positive. 



The Hyper type of ear and the Hyper type of person may be 

 looked upon as the result of rapid transformation with slow 

 growth, and the Hypo type of ear and the Hypo type of person 

 may be looked upon as the result of slow transformation with 

 rapid growth. We are reminded of the work of Gudernatsch 

 (10) and his feeding experiments with tadpoles, in which he 

 obtained the Hyper type of tadpole by feeding tyhroid gland, 

 and the Hypo type by feeding thymus gland. Reasoning from 

 this we may suppose that the Hypo type of man is due to exces- 

 sive secretion of the thymus gland during development, and 

 that the Hyper type of man is due to excessive secretion of the 

 thyroid gland during development. 



In connection with conditions of Hypo-morphism and Hyper- 

 morphism, I would like to present observations made from time 

 to time on two children, Mary, aged 7; Helen, aged 2. Mary 

 was the first child, Helen the third. During the first pregnancy 

 there was evidence of increased activity of the thyroid gland 

 in the mother; during the third there was evidence of less activity 

 of the thyroid gland in the mother. Mary was prematurely 

 born about 1 month. Helen was delayed several weeks. Mary 

 has been premature in everything except size, has metamorphosed 



