CONTENTS 



LECTURE 



XX. 



XXI. 



XXII. 



XXIII. 



XXIV. 



XXV. 



XXVI. 



XXVII. 



XXVIII. 



XXIX. 



XXX. 



XXXI. 

 XXXII. 



XXXIII. 



XXXIV. 



XXXV. 



XXXVI. 



INDEX 



Eegeneeation ....... 



Regeneration [cojitlnned) . . . 



Sh<are of the Parents in the Building up of the 

 Offspring 



Examination of the Hypothesis of the Trans 



MISSIBILITY OF FUNCTIONAL MODIFICATIONS . 



Objections to the Thesis that Functional Modi 



fications are not transmitted . 

 Germinal Selection ...... 



Germinal Selection (continued) 



The Biogenetic Law 



The General Significance of Amphimixis 



The General Significance of Amphimixis (continued) 



In-breeding, Parthenogenesis, Asexual Eeproduc 

 TioN, and their Consequences . 



The Influences of Environment 



Influence of Isolation on the Formation of 

 Species ....... 



Origin of the Specific Type .... 

 Origin of the Specific Type (continued) . 

 The Origin and the Extinction of Species . 

 Spontaneous Generation and Evolution : Con 

 CLUSION ....... 



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101437 



