The Collaborative International Dictionary
Paludinae
Paludina \Pal`u*di"na\, n.; pl. L. Paludin[ae], E. Paludinas. [NL., fr. L. palus, -udis, a marsh, pool.] (Zo["o]l.) Any one of numerous species of freshwater pectinibranchiate mollusks, belonging to Paludina, Melantho, and allied genera. They have an operculated shell which is usually green, often with brown bands. See Illust. of Pond snail, under Pond.
Wiktionary
paludinae
n. (plural of paludina English)