The Malacological Society of London is a British learned society and charitable organisation concerned with malacology, the study of molluscs, a large phylum of invertebrate animals divided into nine or ten taxonomic classes, of which two are extinct. Founded in 1893, the society was one of the earliest such national bodies anywhere in the world concerned only with molluscs, although the Conchological Society of Great Britain and Ireland is older. Source: Wikipedia (en)