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 7-14 b. The Evidence from Embryology 14-23 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 Weismann c. The Unfolding Principle 34-36 Nägeli and Bateson d. Natural Selection 36-39 Darwin