Evolution 



But the change is just what we should devise in order to make the 

 foot stronger for propelhng the body on the ground. Moreover, 

 the difference is more obvious than fundamental, and it is w^ell 



Fig. 137. — Brains of (/^) Cercopithecus (Eastern monkey) ; (//) Chimpanzee ; 

 (Z) Australian Bushman ; {Ai) European. 



known that in armless persons, who develop the possibilities of 



their feet, the latter members can still be turned into wonderfully 



efficient ' hands.' 



In brain development the anthropoids are, as already 



mentioned, greatly inferior to man ; in the Gorilla, the largest- 



148 



