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Webster 1913 Edition

Noun.

[D.

wenteltrap

a winding staircase; cf. G.

wendeltreppe

[Obs.]

Any one of numerous species of elegant, usually white, marine shells of the genus Scalaria, especially

Scalaria pretiosa

, which was formerly highly valued; – called also

staircase shell

. See

wentletrap ‎(plural wentletraps)

Any of numerous species of elegant, usually white, marine shells of the genus Epitonium, especially Epitonium scalare, which was formerly highly valued.

any of numerous species of elegant marine shells of the genus Epitonium