[3] These large drupes have thick , spindle shaped shells covered by blunt tubercles, the aperture is yellowish brown.

[5] There are eight axial ribs with two rows of prominent tubercles encircling the last whorl and a single spiral of tubercles on the other whorls, as well as a spiral sculpture of fine striae.

[5] The aperture is ovate, the outer lips slightly thickened, with six denticles and a columella with a single absolute plait and a moderately developed siphonal fasciole.

These gastropods occur at the outer edge of fringing reefs and subtitle lava shoulders exposed to heavy wave action.

[5] They are common along some exposed rocky coasts at depths of 10-40ft[3] and they often occur in pairs.