CONTENTS. 



PAGE 



CHAPTER I. INTRODUCTORY 1 



CHAPTER II. THE LAURENTIAN SYSTEM .... 7 

 NOTES : LOGAN ON STRUCTURE OF LAURENTIAN ; HUNT 

 ON LIFE IN THE LAURENTIAN; LAURENTIAN GRAPHITE; 

 WESTERN LAURENTIAN ; METAMORPHISM ... 24 



CHAPTER III. THE HISTORY OF A DISCOVERY . . . 35 

 NOTES: LOGAN ON DISCOVERY OF EOZOON, AND ON 

 ADDITIONAL SPECIMENS 48 



CHAPTER IV. WHAT is EOZOON? 59 



, NOTES: ORIGINAL DESCRIPTION; NOTE BY DR. CAR- 

 PENTER ; SPECIMENS FROM LONG LAKE ; ADDITIONAL 

 STRUCTURAL FACTS 76 



CHAPTER V. PRESERVATION OF EOZOON .... 93 

 NOTES: HUNT ON MINERALOGY OF EOZOON; SILICI- 

 FIED FOSSILS IN SILURIAN LIMESTONES; MINERALS 

 ASSOCIATED WITH EOZOON ; GLAUCONITES . . . 115 



CHAPTER VI. CONTEMPORARIES AND SUCCESSORS . . 127 

 NOTES : ON STROMATOPORID^ ; LOCALITIES OF EOZOON 165 



CHAPTER VII. OPPONENTS AND OBJECTIONS . ; . 109 

 NOTES: OBJECTIONS AND EEPLIES; HUNT ON 

 CHEMICAL OBJECTIONS ; REPLY BY DR. CARPENTER 184 



CHAPTER VIII. THE DAWN-ANIMAL AS A TEACHER IN 



SCIENCE 207 



APPENDIX . . 235 



INDEX . 237 



