9 t 



II 



the pencil oftlie artift, ihey would ever remain confounded. 

 Of thefe, feveral which have been defcribed under the 

 ftrongeft convidlion of being really diftin6l, are only to be 

 conveyed to the fcientific world by comparative defcription, 

 a mode which we are induced to hope has been fatisfa6lorily 

 executed in the former part of this work. 



In the genus J^^auiilus nothing has been omitted that 

 could throw light upon a clafs fo obfcure and yet fo intereft- 

 ing ; upon this part of the fubjecl therefore, fome new mat- 

 ter will be found, new fpecies having been the refult of 

 profecuting our refearches,in which we have been materially 

 afliflcd by the cabinet of Tejlacea minuta rariora belonging 

 to our late worthy friend Mr. Boys, fo handfomely pre- 

 fented to us by his ingenious fon Mr. Henry Boys. And 

 we have taken ihis opportunity of offering our public ac- 

 knowledgements for this token of regard, which in its nature 

 may be confidered as a public concern, for by this aid we 

 have been able to correct fome miflakes, more thoroughly 

 define fome of thofe fliells given by Walker, and to affix 

 the fjmonyms of other authors. By the fame means we 

 have alfo afcertained fome of the obfcure names which had 

 been given by Doctor Solander in the PorLland Mufeum, 

 as the identical fpecimens received by Mr. Boys from the 

 Doctor were marked. Of the accuracy of thefe names wc 

 find a full confirmation by a lot of land and frefli-water 

 fliells, which were bought at the fale of that mufeum, now 

 in the polleflion of Mr. Laskey, with their original titles 

 affixed ; and who obligingly indulged us with them for com- 



parifon. 



To 



