The spire is composed of six convex whorls, slightly separated by a shallow suture, and loaded with transverse rounded ribs, which are very approximate.

Twenty to twenty-six transverse ribs may be counted upon its surface, among which, in old specimens, are found other smaller ones which are alternately disposed between the first, towards the most elevated part.

The outer lip, terminated by a scolloped dilatation, is traversed by a canal of no great depth.

The coloring of the exterior is whitish, varied with red, and covered, upon the transverse ribs, with irregular spots which sometimes form longitudinal or zigzag bands of a deeper color.

Upon some specimens are observed ribs which have no other tint of coloring than the ground of the shell.