x THE WORLD OF LIFE 



CHAPTER VIII 



PAGE 



ILLUSTRATIVE CASES OF NATURAL SELECTION AND ADAPTA- 

 TION '. . . . . . .124 



CHAPTER IX 



THE IMPORTANCE OF RECOGNITION-MARKS FOR EVOLUTION. 156 



CHAPTER X 



THE EARTH'S SURFACE- CHANGES .AS THE CONDITION AND 



MOTIVE-POWER OF ORGANIC EVOLUTION . . 173 



CHAPTER XI 



THE PROGRESSIVE DEVELOPMENT OF THE LIFE-WORLD, AS 



SHOWN BY THE GEOLOGICAL RECORD . . 1 88 



CHAPTER XII 

 LIFE OF THE TERTIARY PERIOD ' . . ' . .219 



CHAPTER XIII 



SOME EXTENSIONS OF DARWIN'S THEORY . . . 252 



CHAPTER XIV 



BIRDS AND INSECTS : AS PROOFS OF AN ORGANISING AND 



DIRECTIVE LIFE-PRINCIPLE . . . . 286 



CHAPTER XV 



GENERAL ADAPTATIONS OF PLANTS, ANIMALS, AND MAN . 305 



CHAPTER XVI 



THE VEGETABLE KINGDOM IN ITS SPECIAL RELATION TO MAN 325 



