



PEE FACE 



TO 



THE TENTH EDITION 



It is now thirteen years and a half since the last or ninth 

 edition of the ' Principles of Geology ' appeared ; a long inter- 

 val in the history of the progress of a science, in which so 

 many able investigators and thinkers, in every civilised coun- 

 try of the world, are actively engaged. In re-editing the 

 work, I have found it necessary entirely to re-write some 

 chapters and to recast others, and to modify or omit some 



editions. For the sake of those 



former 



familiar 



made for the first time 



pointing out the pages at which corresponding matter occurs 

 in the ninth and tenth editions. 



List of 



the First 



if the Tenth Edition of the ' Principles of 



Ninth 

 Edition. 





Page 



Tenth 

 Edition. 



Page 



14 



139 



130 



to 



153 



Additions and Corrections 



The opinion of Anaximander, i that fish were the parents of 

 mankind/ how far an anticipation of the modern doctrine 

 of development. 



An abridged table of fossiliferons strata in their order of 

 superposition, inserted from the ' Elements ' for the sake 

 of reference. 



w 



The Ninth Chapter, on the progressive development of or- 

 ganic lite, has been entirely re- written. 



A 2 



