Conchological Society of Great Britain & Ireland: non-marine mollusc records

The records in this dataset are the results of the Society's non-marine census which has been run since 1876. The dataset includes all accepted digital records held by the Society up to the time of publication. The dataset includes data from the cards that were originally digitised at 10km square as part of the publication of the 1999 non-marine mollusc Atlas; a redigitisation of those records at finer scales; and a substantial and growing number of subsequent records.