30 



CHAPTER VII. 



GENERAL CONCLUSIONS, AND IMPORTANCE OF 

 A TRUE THEORY OF EVOLUTION. 



ON our hypothesis and interpretation of the 

 facts and experience set forth in the pre- 

 ceding pages are based the following 

 conclusions : 



Distinct races are far more numerous than 



species, so called. 



Only the stock of a pure race is per- 

 manent. 



Continuous fertility and persistence of 

 stock is the true test of a distinct 

 race. 



The first ancestors of every race were 

 of the same specific type as their ex- 

 isting; descendants. 



o 



Type, although variable in expression, is 



immutable. 

 A modification of type by crossing two 



races that is, an intermediate type 

 is not persistent. 



