CONTENTS 



PAGE 



PREFACE ....... v 



PART I. MATERIALS, METHODS AND 

 PRINCIPLES 



CHAPTER I 



THE SCIENCE OF PALAEONTOLOGY 



I. Scope ....... i 



II. Aims ....... 4 



III. Uses 6 



CHAPTER II 



MATERIALS 

 (A) THE NATURE OF FOSSILS 



I. Definition of the Terms " Fossil " and " Petrifaction " . 10 

 II. Conditions Necessary for Fossilization 



(a) Biological . . . . . 13 



(&) Geological. . . . . .17 



III. Imperfection of Palaeontological Evidence . . 22 



(B) THE OCCURRENCE OF FOSSILS 



I. Fossiliferous and Unfossiliferous Rocks . . 25 



II. Fossils as Rock-Formers . . . . .29 



III. Fossil-Bands ...... 32 



IV. Nodules 36 



V. Derived Fossils ...... 37 



