Index. 



i8i 



Topographical distribution and 

 physiological selection, 74; of 

 varieties, 81. 



Transformation, serial and di- 

 vergent, 21, 121. 



Variability and self-fertilization, 

 177- 



Variation in birds, 34. 



Varieties, topographical distribu- 

 tion of, 81. 



W. 



Wagner, Maritz, 3 ; on geo- 

 graphical isolation, 76 ; quoted, 

 103 ; law of migration, iii. 



Wallace, Mr. A. R., 3, 17; 

 quoted, 34, 47, 51, 57, 130-136; 

 criticized by Gulick, 153. 



Weismann, Prof., on geographical 

 isolation, 76, 114-118. 



Weismannism and physiological 

 selection, 169, 



