Ix 



Crenulata, 241. 

 Nautilina, 241. 



NUMMULINA. 

 Marginata, 242. 



The author, in common with most Conchologists, 

 has felt the want of good figures of the British shells, 

 the majority of the delineations being inadequate for 

 distinguishing the species. He proposes, in the event 

 of there being a sufficient number of subscribers, to 

 publish the figures of every British marine shell, en- 

 graved by -a first rate artist, at the moderate price (to 

 subscribers only) of fifteen shillings a copy. As the 

 production of this desideratum to British concholo- 

 gists will entirely depend upon there being at least 

 fifty subscribers, the author will feel obliged to those 

 gentlemen who may be willing to become so, if they 

 will at their earliest convenience announce their inten- 

 tion to him, under cover to the publisher. 



