TABLE OF CONTENTS 



PAGE 



List of Illustrations xv-xviii 



PART I. INTRODUCTORY AND HISTORICAL 



Chapter I. Introduction 3 



"vlVhat Organic Evolution Is — Definitions 3 



^yrhe Modern Attitude as to the Truth of the Evolution Doctrine . 5 



'VWhat Organic Evolution Is Not 8 



Chapter II. Historical Account of the Development of the 



Evolution Theory. H.H.N 10 



Evolution among the Greeks 11 



Post-x\ristotelians 14 



The Early Theologians 14 



The Revival of Science 15 



The Great Naturalists of the Eighteenth Century 16 



X Lamarck 18 



Cuvier and Geofifroy St. Hilaire 21 



Catastrophism and Uniformitarianism 22 



The Reawakening of the Evolution Idea 23 



Charles Darwin 24 



">■■ Summary of Darwin's Theories 25 



Contemporary Opinion Regarding the Validity of Darwin's Views 27 



Isolation Theories ^^ 



Orthogenesis Theories H 



Mutation or Heterogenesis Theories 36 



The Rise and Vogue of Biometry 3^ 



\^Modern Experimental Evolution 39 



^V^Iendel's Laws -^^ 



Hybridization and the Origin of Species 43 



Neo-Mendelian Developments 43 



heredity and Sex 44 



Chapter III. The Relation of Evolution to Materialism. 



Joseph Le Conte 4o 



PART II. EVIDENCES OF ORGANIC EVOLUTION 

 Chapter IV. Is Organic Evolution an Established Principle ? 



H.H.N "^^ 



Chapter V. Evidences from Palaeontology 61 



Strength and Weakness of the Evidence ^^ 



ix 



