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A CATALOGUE OF THE LAND AND FRESHWATER 

 MOLLUSCA OF SUSSEX. 



By E. W. Swanton. 



(Member of the Conchological Society; Curator of the Educational Museum, 



Haslemere.) 



A paper under the above title by J. E. Harting, F.Z.S.,* 

 was published in the ' Zoologist ' in the spring of 1878. Ninety- 

 four species were enumerated, but no allusion was made to 

 varieties. The sources of information at Mr. Harting's disposal 

 included William Borrer's MS. List of Sussex Land and Fresh- 

 water Mollusca, Weaver's account as given in Gordon's ' History 

 of Harting, 'and W. C. Unwin's "List of Lewes Mollusca," which 

 appeared in the ' Naturalist ' in 1853. 



During the past thirty-seven years our knowledge of the 

 molluscan fauna of the county has increased very considerably. 

 Numerous papers and notes have appeared from time to time in 

 various scientific periodicals, including the ' Journal of Con- 

 chology,' which published William Jeffery's authenticated list 

 of the Land and Freshwater Mollusca of Western Sussex (1882), 

 J. H. A. Jenner's paper concerning East Sussex species (1891), 

 and East Sussex records by William Whitwell (1900-1903), 



If we include post-Tertiary forms now extinct in Britain, 

 some thirty species have been added to the Sussex list since the 

 appearance of Mr. Harting's paper, and about one hundred and 

 sixty varieties have been recorded. The need of a revised and 

 extended catalogue is thus very evident. By way of introduction 

 to the same, some comments may be given upon certain points 

 of special interest. 



New Species. 



Of recent additions to the British list of inland Mollusca, 

 Helicella heripensis, Planorbis vorticulus, and Valvata macrostoma 

 have been found in Sussex. It may be noted, though, concerning 



* Editor of the ' Zoologist' at that time. 



