MAN. 361 



known human brain is only twice as heavy as those of the 

 lowest races of men. There is a corresponding difference 

 in the shape of the head (compare Figs. 152 and 154). 



FIG. 152. Human skulls. The one in heavy outline, with portions shaded, is a 

 Caucasian skull. That merely outlined (in dotted line) is of an Australian negro. 



FIG. 153. Skull of young orang-outang (dotted outline) superimposed on 

 that of young child. 



The great toe cannot be opposed to the other toes as in 

 the case of the apes (Fig. 1 58) , or as man can oppose his 

 thumb. There is freer motion of the big toe, however, in 



