CONTENTS 



MEMOIR OF THE AUTHOR . . . . . vii 

 PREFACE xi 



INTRODUCTION xv 



Natural Philosophy. Evolution. The Break in 

 Evolution. Monism and Dualism. 



CHAPTER I PHYSICAL EVOLUTION ... 1 



Evolution of the Universe. Evolution of the Solar 

 System. Evolution of the Earth. 



CHAPTER II ANCIENT LIFE ON THE EARTH . 10 



The Laurentian Period. Huronian Life. Algon- 

 kian Life. Cambrian Life. Speculations on 



Ere-Ordovician Life. Ordovician and Silurian 

 ife. Speculations on Ordovician and Silurian 

 Life. Summary. 



CHAPTER III LATER LIFE ON THE EARTH . 39 



Deutozoic Life. Mesozoic Life. Cainozoic Life. 

 The Migrations of Man. 



TABLE OF ROCK FORMATIONS . . . .68 



CHAPTER IV THE GENERALISATIONS OF 

 PALAEONTOLOGY 69 



The Palceontological Record. Generalisations. 

 Proof of Evolution. Proof by Gradation. 

 Speculations. 



CHAPTER V HEREDITY AND VARIATION . . 87 



The observed Phenomena. Definite and indefinite 

 Variation. Discontinuous Variation. 



CHAPTER VI EXPLANATORY HYPOTHESES . 100 



Criticisms and Suggestions. 

 xxiii 



