DESCENT OF MAN FROM SOME LOWER FORM. 173 



such as Australia, New Guinea, or Borneo, which is now 

 the home of the orang. And natural selection arising 

 from the competition of tribe with tribe, in some such 

 large area as one of these, together with the inherited 

 effects of habit, would, under favorable conditions, have 

 sufficed to raise man to his present high position in the 

 organic scale. 



