Conchological Society of Great Britain & Ireland: non-marine molluscs (1999 Atlas dataset)

The records in this dataset are the published summary of the results of the Conchological Society's non-marine census which from 1876 to 1999. The dataset is the result of a piece of work to digitise the data primarily to a 10km square level (i.e. not the detailed records) and verify them ahead of publication in the 1999 atlas (Kerney, M. P. 1999. Atlas of the land and freshwater molluscs of Britain and Ireland. Colchester: Harley Books.). There is a programme of work to digitise the original more records which is available as a separate dataset. The data here are a copy of those originally held by the Biological Record Centre used to produce the atlas. All the survey data were collected by members of the Conchological Society. No further changes will be made to this dataset other than correcting any errors that are identified.