TABLE OF CONTEXTS 



CHAPTER I 



A REVALUATION OF THE EVIDENCE ON 



WHICH THE THEORY OF EVOLUTION 



WAS BASED 



PAGE 



Preface v 



1. Three Kinds of Evolution 1-7 



2 The Evidence for Organic Evolution 7-27 



a. The Evidence from Comparative Anatomy 7-1 i 



b. The Evidence from Embryology 11-23 



c. The Evidence from Paleontology 24-27 



3. The Four Great Historical Speculations. .27-39 



a. The Environment 27-31 



Geoffroy St. Hilaire 



b. Use and Disuse 31-34 



From Lamarck to Weism.iiiu 



c. The Unfolding Principle 31-3G 



Nageli and Bateson 



d. Natural Selection 3()-39 



Darwin 



vii 



