PUBLISHERS' ADVERTISEMENT TO THE 

 SIXTH EDITION. 



The Conchologist*s Text-Book, of which a revised and 

 improved edition is now offered to the Public, has been 

 so favourably received as to have passed through five 

 editions since its first appearance in 1833. In the 

 present edition — the Sixth — several alterations have 

 been made on the translations of Lamarck's generic 

 and specific characters ; the descriptive portion has 

 been revised, and a chapter on the Mollusca, with two 

 illustrative plates, has been added from the ' Elemens 

 de Zoologie ' of M. Milne Edwards. For these, and 

 any other alterations on, or additions to, the text of 

 preceding editions, the editor of the present edition, 

 Professor Macoillivray, is alone responsible. 



