122 



THE SURVIVAL OF THE UNLIKE. 



[IV. 



experiment station? Here we have absolutely new and 

 unique types, and they are as distinct from each other 

 and from their parents, in accepted botanical characters, 



N. Lycopersicum Humboldtii. Tropical America. 



as ' ' good species ' ' in the same genus are from each 

 other, and they perpetuate these characters as une- 

 quivocally as those various species do. Moreover, we 



