15 



d. The larval and adult forms of an individual may- 

 vary independently of each other. 



Larva, pupa, and imago of Lepidoptera. 



(Weismann, Studies in the Theory of Descent, Vol. 2, pp. 404- 

 407, and pp. 416-419.) 



e. Variation associated with changed conditions of 

 life. 



Acclimatisation. 



(vSee Darwin, Animals and Plants under Domestication, Vol. 2, 

 p. 295; and Wallace, Darwinism, p. 94.) 



Dogs and sheep in India. 



Geese in Bogota. 



Wheat, etc. 



Greyhounds in Mexico (Brooks p. 151.) 



Domestication. 



(Darwin, 1. c, Vol. 2, p. 249-252.) 



Variation following cultivation of plants. 

 Turkeys reared from eggs of wild ones. 

 Wild ducks. 



Effect not direct, but on subsequent genera- 

 tions. 

 Bateson's objections. 



f. Sexually produced organisms the more variable. 

 (Brooks, Heredity, p. 143.) 



The sweet orange in Italy. 



Bud variation (Darwin, Vol. i, pp. 361 and 



389). 

 Contrast with seminal variation. 



(T. Males more variable than females. 



A 



(Darwin, Descent of Man, Vol. i, p. 266; Brooks, p. 160; 

 Ellis, Man and Woman, p. 35S.) 



