466 



ZOOLOGY 



. differences, however, except that relating to the brain, are of 

 minor importance. 



FIG. 244. 



FIG. 244. 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. 



FlG. 245. 



FIG. 245. Skull of young orang outang (dotted outline) superimposed on that of a young child. 



469. Functional Distinction Between Man and the Other 

 Mammals. While the structural differences are not sufficient 

 to remove man from the group of primates, because they are 

 relatively insignificant in themselves, the powers and activities 

 and modes of life that have arisen from these do serve to place 

 man clearly into a group of his own. These great improvements 

 in powers have accompanied and are in some measure due to the 

 gaining of the upright position and to the use of the hands as the 



