280 THE SCIENCE OF LIFE. 



over the face, being four to one. Man differs from all 

 Apes in the absolute size of brain, and in the greater 

 complexity and less symmetrical arrangement of its con- 

 volutions. The brain of the Gorilla scarcely amounts 

 to one third in volume or one half in weight of that of 

 Man. 



From purely morphological reasons, therefore, Man is 

 entitled to rank as a distinct order of Vertebrates. Other 

 considerations, to be referred to in the next chapter, 

 show that he should be regarded as a distinct type. 



