INTRODUCTION. 



iV 



have generally different purfults, othervvife thefe objeds would fcarcely have 

 efcaped the attention of many other Gentlemen, as well as of the quick- 

 fighted Mr. Ellis, a juftly celebrated Author, who hath fo clearly inveftigated 

 and defcribed the corals and corallines of the adjoining coafls. 



To Mr. B TS, all praife is juftly due from every lover of natural fcience, 

 for his happy and fuccefsful inveftigation of this part of our natural hiftory, 

 which hath fo long continued unexplored. 



Being anxious of adding ftlll more to this elegant colledion, than the 

 Sand from Sandwich had afforded, I have examined the fediments of various 

 pai ts of tiie fhores, from thence up to Faverfliara, and the ifle of Shepey, 

 as well as the banks of frefli water ftreams and ditches, the boggy places, 

 and the woods in this neighbourhood, whereby very confiderablc additions 

 have been made, which are noticed in the explanatory index. 



When the drawings were finiflied, there remained an almoft infurmountable 

 difficulty in my properly arranging and defcribing the Shells ; thro' my fmall 

 acquaintance with Conchology, neverthelefs this was overcome, by the obliging 

 affillance of my antient friend Mr. Jacob, who always willing to inftrucl me 

 in my weak refearches in natural hiftory, moft kindly engaged in the talk, 

 tho' fo liable to cenfine. 



The ClafTification is agreeable to that of the greateft illuminator of natural 

 hiftory the Suii ever (hone upon the illuftrious Linnceus however, in a 

 retrograde courfe ; as that feemed more fuitable to this colle6tion— if the 

 defcriptions fliould be deemed fomewhat imperfect, and not fufficiently clear, 

 a reference may be had, for further fatisfaclion, to the engravings, which 

 may be depended upon as very exa£l copies of the originals, altho' fo much 

 enlarged. Their natural fize may be known by the fmall figures at the 

 bottom or on the fide of each enlarged fpecimen ; and where there is no 

 mark or minute figure fubjoined, that is of the real fize or notice, will be 

 taken of the omiffion in the index. 



The 



