MalluviumMalluvium is a genus of small sea snails, limpet-like cap snails, marine gastropod molluscs in the family Hipponicidae, the hoofshells or hoof snails.DescriptionThis genus is distinguished from Amalthea typica by its completely smooth surface. They are sometimes white, sometimes marked with two or three longitudinal cinnamon or chestnut rays. The aperture is oval or circular and whitish within, with a thin margin and a thin to solid basal lamina.SpeciesSpecies within the genus Malluvium include:Malluvium calcareum Malluvium devotum ''Malluvium lissum''