Scalaria \Sca*la"ri*a\, n. [L., flight of steps.] (Zool.)
Any one of numerous species of marine gastropods of the genus
{Scalaria}, or family {Scalaridae}, 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}.
[1913 Webster]