ADVERTISEMENT. 



THE Editors of the Transactions of the Geological Society are 

 directed to make it known 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 Society, may be addressed to the Apartments of the 

 Geological Society, Somerset House, London. 



