pleurotoma

Pleu*rot"o*ma, n.; pl. L. Pleurotomæ, E. Pleurotomas. Etym: [NL., fr. Gr. (Zoöl.) Defn: Any marine gastropod belonging to Pleurotoma, and ether allied genera of the family Pleurotmidæ. The species are very numerous, especially in tropical seas. The outer lip has usually a posterior notch or slit.

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