874 THE AMERICAN NA TURALIST. [Vol. XXXVII. 



that nine tenths of what is undertaken here could, with proper 

 provision, be done anywhere. Ecological types are as widely 

 distributed and as available for study in different places as 

 are morphological types : and biological phenomena are as tan- 

 gible and as real as are systematic, while certainly not of less 

 interest or educational value. 



