CONTENTS 



LECTURE PAGE 



XX. Eegeneeation ........ 1 



XXI. Eegeneeation {cotitinued) ...... 23 



XXII. Sh<are of the Parents in the Building up op the 



Offspeing ........ 37 



XXIII. Examination of the Hypothesis op the Teans- 



MissiBiLiTY OP Functional Modifications . . 62 



XXIV. Objections to the Thesis that Functional Modi- 



pications aee not teansmitted . . . . 80 



XXV. Geeminai, Selection . . . . . . . 113 



XXVI. Germinal Selection [continued] . . . . 136 



XXVII. The Biogenetic Law 159 



XXVIII. The General Significance of Amphimixis . . 192 



XXIX. The General Significance of Amphimixis (continued) 210 

 XXX. In-breeding, Parthenogenesis, Asexual Eeproduc- 



TION, AND THEIE CONSEQUENCES .... 238 



XXXI. The Influences op Environment . . . . 265 



XXXII. Influence op Isolation on the Foemation of 



Species ........ 280 



XXXIII. Origin op the Specific Type ..... 299 



XXXIV. Origin of the Specific Type [continued) . . . 330 

 XXXV. The Oeigin and the Extinction of Species . . 346 



XXXVI. Spontaneous Geneeation and Evolution: Con- 

 clusion ........ 364 



INDEX 397 



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