HEREDITY AND VARIATION 99 



important, if not the exclusive, variations from 

 which new species of animals arise. And Professor 

 H. de Vreis advocates the same view for plants. 

 This question, which is not yet settled, seems to me 

 to be of only secondary importance, and I need not 

 discuss it here further than to point out that definite 

 variations might be easily confounded with sports ; 

 for they would resemble each other in appearance, 

 although they differed in their method of 

 development. 



