Een voorlopig overzicht van de slakken op de begraafplaats aan de Overweersepolderdijk in Purmerend

Brief surveys for the occurrence of terrestrial gastropods on the small Catholic cemetery in Purmerend, province of North-Holland, the Netherlands, so far revealed the presence of 17 species. Most notably among them are the invasive exotic slugs Boettgerilla pallens and Lehmannia valentiana, and the invasive native snail Candidula intersecta. Still lacking on the checklist are numerous tiny species like Vallonia.