201 



The author begs to preface the following Cata- 

 logue of Testaceological Writers, by an acknow- 

 ledgment of his being indebted for the substance 

 of it to a paper in vol. vii. of the Linnsean Trans- 

 actions, by Dr. Maton and the Rev. Mr. Rackett. 

 It is so perfect a compendium of the subject, that 

 he trusts he need offer no apology for wishing to 

 render it more generally useful, by putting it into 

 a form which is capable of wider dissemination 

 than the work in which it is at present extant. In 

 altering the arrangement from a chronological into 

 an alphabetical one, he by no means wishes to 

 imply that he considers the former method excep- 

 tionable, but only less adapted to an elementary 

 treatise, intended rather for the horn-book of 

 learners, than for the information of the scientific. 



The numerals which are placed after the name 

 of the conchological author refer to the nature of 

 the work, the title of which is given immediately 

 afterwards in Italics. By these numerals will be 

 designated the branch of science which each writer 

 has pursued ; and by comparing them with the 

 annexed arrangement, it will be known at once 



