CONTENTS. 



PART I. GENERAL INTRODUCTION. 



CHAPTER I. 



PAGE 



Definition of Palaeontology Definition of the term " fossil " Pro- 

 cesses of Fossilisation Definition of "rock" Classification of 

 Rocks, 1-5 



CHAPTER II. 



Characters of the Sedimentary Rocks Mode of formation of the Sedi- 

 mentary Rocks Definition of the term "formation" Chief 

 divisions of the Aqueous Rocks Mechanically-formed Rocks 

 Chemically-formed Rocks Organically-formed Rocks Different 

 ages of the Aqueous Rocks Chronological Succession of the 

 Stratified Rocks, .". . 5-14 



CHAPTER III. 



Use of the term "contemporaneous," as applied to groups of beds 

 General sequence of phenomena at the close of each Geological 

 Period Migrations Differences between the fossils of known 

 contemporaneous strata Geological continuity Relations be- 

 tween the Chalk and the Atlantic Ooze Reappearance of similar 

 forms of life under similar conditions Doctrine of " Colonies," 14-27 



CHAPTER IV. 



Causes of the Imperfection of the Palseontological Record Causes of 

 the absence of certain animals as fossils Unrepresented time 

 Unconformity, sequence of phenomena indicated by Leading 

 examples of unconformity Thinning out of beds Sudden ex- 

 tinction of Animals Disappearance of fossils, . "". 27-39 



CHAPTER V. 



Conclusions to be drawn from Fossils Age of Rocks Mode of origin 

 of any Fossiliferous bed Fluviatile, lacustrine, and marine deposits 

 Conclusions as to Climate, 4-44 



CHAPTER VI. 



Primary divisions of the Animal Kingdom Impossibility of a linear 

 Classification Tabular view of the chief divisions of the Animal 

 Kingdom General succession and progression of organic types, 44-55 



