iv 
DEDICATION. 
/ now dedicate this Volume to the Geologist who has not 
only applied my classification to the vast regions of British 
North America, but has taught us by his recent important 
researches that the Laurentian Bocks constitute the foundation- 
stones of all Palaeozoic deposits in the crust of the Globe, 
wherever their Foundations are known. 
RODERICK IMPEY MURCHISON. 
Belgrave Square, London, 
July 10, 1867. 
