Habitat: Underside of rocks Depth: Intertidal to 14m Characteristics: Shell length reaches 47 mm. The shell and operculum are dark chestnut brown, and the aperture is creamy yellow, sometimes with a salmon tint. Soft parts of the animal are reddish orange, with a scattering of small white dots on the siphon and tentacles. The profile of the species is variable. The axial ribs are weak, forming about eight to ten nodules at the shoulder, where they are crossed by a narrow spinal cord. The columella has three or four folds.