Source : Webster's Revised Unabridged Dictionary (1913)

Scalaria \Sca*la"ri*a\, n. [L., flight of steps.] (Zo["o]l.)
   Any one of numerous species of marine gastropods of the genus
   {Scalaria}, or family {Scalarid[ae]}, having elongated spiral
   turreted shells, with rounded whorls, usually crossed by ribs
   or varices. The color is generally white or pale. Called also
   {ladder shell}, and {wentletrap}. See {Ptenoglossa}, and
   {Wentletrap}.