CONT E NTS 

 I 



The Chain of Life Traced Backward in Geological ""' 

 Time 



3 



II 



Life in the Early Cambrian 



• • . 17 



III 



1'he-Cami5rian Life 



47 



IV 



FOUNDATIONS OF THE CONT.N.CNTS, AND THEIR GENERAL 

 lESTIMONY AS TO LlFF 



79 



V 



PROnABILITIKS AS TOLaUKENTIAN Life, AND CONDITIONS 

 OF ITS I'RKSERVATION 



107 



VI 



The History of a Discovery 



125 



vn 



The Dawn of Life 



'47 



3d 



