ADVERTISEMENT 



THE Editors of the Transactions of tJu Geological Society arc 

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

 siblefor 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, I^ndon. 



