Eleven participants investigated the mollusc fauna of the dune and pine forest area between Schoorl and Bergen aan Zee, Province of North-Holland. No freshwater molluscs were found in the rainfed waters. However, 19 terrestrial snail species were recorded, including seven species of slugs. Limax cinereoniger was found for the first time in the western dune area in the Netherlands.

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Spirula

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Nederlandse Malacologische Vereniging

G. van der Velde, & A. van den Berg. (2015). Verslag van de excursie op 3 mei 2014 naar De Kerf in de duinen bij Schoorl met een vondst van de Zwarte aardslak Limax cinereoniger Wolf, 1803. Spirula, 402, 37–38.