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XI. Descriptions of Seven new British Land and Fresh-water 

 Shells, with Observations upon many other Species, including 

 a List of such as have been found in the County of Suffolk. 

 By the Rev. Revett Sheppard, F.L.S. 



Read March 4, 1823. 



In the Descriptive Catalogue of British Testacea, pubHshed by 

 Dr. Maton and Mr. Rackett, in the eighth volume of the Linnean 

 Transactions, the habitats of the Land and Fresh-water Shells 

 having for the most part been confined to the midland and west- 

 ern counties, I have been induced to lay before the Society a 

 description of seven new species, and a list, with copious obser- 

 vations, of the Land and Fresh- water Shells hitherto discovered 

 in the county of Suffolk, and occasional notices of places in 

 which they have been found in Essex* ; by which it will be seen, 

 that the eastern parts also of this island are equally fertile in 

 those elegant and interesting productions of Nature. The utility 

 of such an undertaking seems to be generally allowed ; and 

 should this humble attempt meet with approbation from the 

 lovers of conchology, I shall be amply gratified. 



Although I have followed Linnaeus's arrangement in prefe- 

 rence to any other, from the opinion that the Land and Fresh- 

 water Shells are all reducible to his genera ; I must nevertheless, 

 in justice to M. Draparnaud, remark, that I esteem his work 

 to be a most admirable one ; and that his genera (at least those 

 adopted by him), considering them as subdivisions of the Lin- 

 naean genera, are, with few exceptions, secundum naturam. 



* My knowledge of Essex is confined to the hundred of Tendring, a peninsula 

 fonned by the German Ocean and the rivers Stour and Colne. 



ARRANGE- 



