

To the above gentlemen fcience is greatly indebted fop 

 their liberal communications, who together have brought to 

 light many new fpecies by their indefatigable refearches on 

 the coaR o^ Scot I j?id ; and from whom we have received 

 a copious catalogue of the indigena as well as fpecimens 

 of fliells, both contributing largely to the elucidation of the 

 fubjedl, as the follov^ing flieets will evince. 



It will be obferved fome of "our figures have been antici- 

 pated by the authors of the Defcriptive Catalogue of Briti/Ij 

 Teflacea publiflicd in vol. viii. of the TranJaSlions of the 

 Linncean Society, and which were engraved previoufly to our 

 knowledge of the extent of that work : and many excellent 

 figures, together with concife defcriptions, with references 

 to Tejlacea Britajinica, have fuperceded the necellity of deli- 

 neating others which were originally intended to accompany 

 this fupplement. 



In this place we cannot omit that tribute of refpedl and 

 approbation due to the elaborate writings of thofe gentlemen 

 wlio have contributed fo largely to the hiftorical part of 

 TeRaceology, and to the elucidation of the Lhmcean fpecies 

 confidered as Briti//j* We cannot however avoid remark- 

 ing that with the greateft deference, and with the highefl 

 confideration for the fyfiem of our great mafter Linnaeus, 

 we cannot accord in an opinion fo adverfe to the improve- 



*An Historical Account of Testaceological Writers — Lin. Trans. \o]. vii. p. 1 19. 

 Anii, A Descriptive Catalogue of British Testacea, by Wm. Geo. Maton, M. D. 

 V. P. L. &c. and the Rev. Thos. Rackett, M. A. F. L. S. c*^c. 



A 2 ment 



