OUR FACE FROM FISH TO MAN 



weight, often gaining or losing as much as 15 or 20 pounds 

 in a short space of time. Those of the linear type on the 

 contrary do not experience rapid weight changes but main- 

 tain a very constant weight, and may during the twenty 

 years from about nineteen to thirty-nine vary a small 

 number of pounds. The lateral type arrives at puberty 

 a little late and is slow differentiating, the larynx of the 

 male does not develop so suddenly as in the linear type and 

 does not usually grow so large. The voice is thus high 

 or tenor instead of bass. When men are under thirty 

 years old the heaviest bass voices are almost always found 

 among the thin linear individuals and these are very rarely 

 tenors. The finest tenor voices are those of the round lat- 

 eral type. Everyone recalls that the fine tenor is a fat 

 man while the heaviest bass is a tall thin man. 



The two types are more clearly expressed in men than 

 in women since the growth and glandular reactions are 

 more decided in the male than in the female and are also 

 freer from physiological disturbances. Many more phy- 

 sical points of difference and contrast could be cited for 

 the groups but the above list is sufficient to make the 

 differences clear. 



The balance between these two opposite growth 

 tendencies is very dehcate and during individual 

 development environmental stimuli may deflect 

 the results now in one direction and later in the 

 other, the exact median between the extremes 

 being seldom realized. 



As to the inheritance of individual features, Von 



Luschan, Hooton and other anthropologists have 



shown that in respect to adult head length and 



head breadth, nose length and nose breadth and 



236 



