REPRODUCTION 97 



complete identity results. Yet this operation 

 of the rigid transfer of traits from individual 

 to individual is an essential step, perhaps the 

 essential step, in the process of racial progress^ 

 Without it the evolution of man would have 

 been impossible. In the last lecture I shall en- 

 deavor to show the relations of this process 

 of reproduction to that of evolution as seen in 

 the human species. 



