The periphery of the shell forms a twisted ridge at the outer edge of each whorl.

Each whorl also has regular, coarsely sculpted rows of fine knobs and folds.

The base is marked with several spiral cords concentric to the arcuated columella which has a pearly groove.

The unusual operculum has four strong ridges on its outer side decorated with hard shelly bristles that radiate in a curvilinear fashion from its pointed edge.

[4][5] This large snail inhabits rocky shores in shallow waters, generally protected areas below the low tide level.