CONTENTS 



CHAPTER I. 



PAGE 



INTRODUCTORY: THE DARWINISM OF DARWIN AND OF THE 



POST-DARWINIAN SCHOOLS I 



CHAPTER II. 



CHARACTERS AS HEREDITARY AND ACQUIRED (Preliminary) 39 



CHAPTER III. 



CHARACTERS AS HEREDITARY AND ACQUIRED (Continued). 

 A. Indirect evidence in favour of the Inheritance of Ac- 

 quired Characters 60 



R Inherited effects of Use and of Disuse . ... 95 



CHAPTER IV. 



CHARACTERS AS HEREDITARY AND ACQUIRED (Continued). 

 C. Experimental evidence in favour of the Inheritance of 



Acquired Characters . . . .103 



CHAPTER V. 



CHARACTERS AS HEREDITARY AND ACQUIRED (Continued). 

 A. and B. Direct and Indirect Evidence in favour of the 



Non-inheritance of Acquired Characters . . -133 

 C. Experimental Evidence as to the Non inheritance of 



Acquired Characters 142 



