ADVERTISEMENT. 



THE Editors of the Transactions of the Geological Society are 

 directed to make it knovm to the Public, that the Authors alone are respon- 

 sible for the facts and opinions, contained in their respective papers. 



It is requested that all letters and communications to the Secretaries, 

 and presents to the Societi/, may be addressed to the Apartments of the 

 Geological Society, Somerset House, London. 



