viii CONTENTS. 



VII. 



PAGE 



Lylll and Modern Geology— Darwin's Theory of Selection 

 — Beginning of Life 127 



VIII. 



Heredity— Reversion— Variability— Adaptation— Results of 

 Use and Disuse of Organs— Differentiation leading to 

 Perfection . 165 



IX. 



The Development of the Lndiyidual (Ontogenesis) is a Re- 

 petition OF the Historical Development of the Family 

 (Phylogenesis) 195 



X. 



The Geographical Distribution of Animals in the light of 



the Doctrine of Derivation 222 



XI. 

 The Pedigree of Vertebrate Animals . , « • , • . 24S 



xn. 



Man • . . 282 



References and Quotations • . . 311 



