CONTENTS 



CHAPTER I. 



PACK 



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 



"Z, Inherited effects of Use and of Dimse , ... 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 Noninhetitance of 



Acquired Characters . . . . . .14a 



