The parietal callus is lined with a narrow, dark inner lip, covered with regularly spaced, brown, rib-like plicae.

The outer lip is scalloped but less projected and toothed with about 10 pairs of rib-like teeth superimposed on square, dark brown blotches.

[6] The veliger larvae have a period of pelagic development of more than three months, drifting in the trans-Atlantic currents.

These larvae are the largest known of any Ranellidae in the Atlantic; the larval shell reaches 5 millimetres (0.20 in) when fully developed.

[4] Thin-shelled 'crabbed' examples have been found in traps off the west coast of Barbados at depths around 155–185 metres (509–607 ft).