THE MAMMALS 231 



Homo sapiens. Man's permanently upright walk, hairless 

 body, and large brain are among the more conspicuous 

 differences in structure separating him from the apes, but 

 there is nevertheless an astonishing similarity in many 

 other structural peculiarities as well as in embryological 

 development. In a later chapter some of these character- 

 istics will be briefly described. 



