36 THE VARIATION OF ANIMALS IN NATURE 



11. 



in. 



IV. 



VI. 



Vll. 



Vlll. 



IX. 



Kammerer 

 (i9 J 9) 



Alytes ; modifica- 

 tion of male 

 thumb 



(1924). 



(Experiments not 

 identical in the 

 first two cases.) 



Diverse interpreta- 

 tions are possible 

 (see Detlefsen, I.e. 

 p. 266). 



Procedure questioned 

 (cf. Noble, 1926). 



