41. "' Hypselostomatidae "'is a family of land snails, terrestrial pulmonate gastropod mollusks in the clade Stylommatophora. 42. Unlike the pulmonate snail families, apple snails are not hermaphroditic, but gonochoristic; i . e . they have separate genders. 43. ""'Pupilla muscorum " "', terrestrial pulmonate gastropod mollusk or micromollusk in the family Pupillidae. 44. To seal the opening to their shell to prevent water loss, pulmonate land snails secrete a membrane of dried mucus called an epiphragm. 45. Virtually all pulmonate snails are inoperculate, i . e . they do not have an operculum, with the exception of the Amphiboloidea. 46. They are aquatic pulmonate gastropod mollusks in the tribe Ancylini within the family Planorbidae, the ram's horn snails and their allies. 47. "' Camaenidae "'is a terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea, the typical snails and their allies. 48. "' Acroreiidae "'is an extinct family of air-breathing snails, pulmonate gastropod mollusks in the superfamily Siphonariidae. 49. ""'Tandonia serbica " "'is a species of terrestrial pulmonate gastropod mollusk in the family Milacidae. 50. Predatory pulmonate land slugs, such as the ghost slug, use elongated razor-sharp teeth on the radula to seize and devour earthworms.
