170 



A List of Land and Fresh- Water Mollusca collected in 

 the Eastern 'part of Btrivickshire. ^y William 

 Evans, F.R.S.E. 



Having on several occasions, during tlie last five or six 

 years, collected Land and Fresh- Water Mollusca in the 

 Eastern part of Berwickshire, it may be worth while putting 

 on record, in the pages of the Club's Proceedings, a list of 

 the species I have obtained. 



The first volume of the Proceedings contains several lists 

 of "Berwickshire and North Durham" Mollusca by the late 

 Dr Johnston, among them being one of the " Pulmoniferous " 

 species, drawn up apparently in 1837>' To that excellent 

 list I have, as may be supposed, little to add. The recent 

 advances made in our knowledge of the British Slugs enables 

 me, however, to amplify the jiortion of the list which deals 

 with them. Of the rest, two species only, namely Vertigo 

 edentula (Drap.) and Planorhis parvus, Say, are not in Dr 

 Johnston's catalogue; but the habitats for some of the others 

 may also be of use when a detailed account of their 

 distribution in the county comes to be written. 



The arrangement and nomenclature followed are those of 

 the Conchological Society's list of 1892. 



As a guarantee for the correctness of the identifications, I 

 ought to state that specimens of eveiy species included in 

 the following list have been submitted to Messrs J. W. Taylor 

 and W. D. Roebuck, Leeds, referees of the Conchological 

 Society under its scheme of authentication.! 



So far as I can make out, about seventy species of Land 

 and Fresh- Water Mollusca have now been recorded for 

 Berwickshire, and others no doubt remain to be discovered, 

 seeing fully one hundred species are known to occur north 

 of the Border. Further, a great deal yet remains to be done 

 at the subject in its topographical aspect, so that if some 

 one resident in the county will seriously turn his attention 

 to the group, he will find in it a fruitful, as well as an 

 attractive field of enquiry still open to him. 



* Proceedings of the Berwickshire Naturalists' Club, Vol. i., pp. 154-156. 



t See Mr Roebuck's "Census of Scottish Land and Fresh Water 

 Mollusca" (Proc. Roy. Phy. Soc, Vol. x., pp. 437-503) where a number 

 of my Berwickshire specimens have already been recorded. 



