ADVERTISEMENT. 



The following pages, intended for a sequence to the 

 Conchologist's Text-Book, will, I trust, be found service- 

 able to those beginners, who, after having mastered the 

 difficulties of the genera, and so far arranged their col- 

 lections, are now resolving to enrich their specimens by 

 the specific titles also. The Author is not aware of any 

 EngUsh work, on the Lamarkian system, that would aid 

 them in their endeavours, and has therefore compiled a 

 descriptive catalogue of those shells, which, from their 

 moderate price and comparative commonness, will be 

 most likely to reach the cabinet of the youthful amateur 

 in this pleasing science. The references to figures are 

 solely made to modem works, — as the more ancient, 

 from their rarity and costhness, seldom, if ever, are pos- 

 sessed by that class of readers for whom this book is 

 especially written. With similar views, four books only 

 have been quoted for the iconography ; but wherever 

 no illustrative drawing was to be met with in them, 

 the outline has been added in the accompanyuig Plates. 

 I need but further state (previous to committing 



