Hypertext Webster Gateway: "Turritella"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Turritella \Tur`ri*tel"la\, n. [NL., dim fr. L. turris tower.]
(Zo["o]l.)
Any spiral marine gastropod belonging to {Turritella} and
allied genera. These mollusks have an elongated, turreted
shell, composed of many whorls. They have a rounded aperture,
and a horny multispiral operculum.
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