x PREFACE TO THE FIRST EDITION. 
With this conviction the present volumes are offered, with 
such modifications of the original plan as circumstances have — 
rendered necessary, as a guide for the Student and the 
Amateur Collector of fossil remains; for the intelligent 
Observer who may desire to possess a general knowledge of 
the subject, without intending to pursue Geology as a science ; 
and for the Tourist who may wish, in the course of his 
travels, to employ profitably a leisure hour in quest of those 
interesting memorials of the ancient physical revolutions 
of our globe, which he will find everywhere presented to his 
observation. 
CrEscENT Lopes, 
CLAPHAM CoMMON, 
May, 1844. 
