The shell is of average size for the genus (ca. 30 mm in length) and fusiform. The spire is high and acute, consisting of ten postnuclear whorls and a protoconch of undetermined nature. The suture is moderately impressed, but appears deeply impressed, owing to the excavated nature of the shoulder. The body whorl is moderately large and fusoid. The aperture is subovate, with an insignificant anal sulcus. The; outer apertural lip is barely erect and coarsely crenulate; its inner surface is smooth. The columellar lip is adherent above, and barely detached below. The siphonal canal is moderate in length and is narrowly open to fused.
The body whorl bears three briefly winged varices. Intervarical axial sculpture is lacking. Spiral sculpture consists of nine cords of varying strength: four strong ones on the body, three weak ones in the space between the body and the canal, and two weak ones on the canal. Where these cords intersect the varices, short to moderately long, dorsally recurved hollow spines are developed. A thin webbing arises between the spines of the body and the interspace, and extends as far from the surface of the whorl as the spines do, On the dorsal side of the body portion of the varix, the cords appear so abruptly from the unsculptured body surface and are so strongly raised that the spaces between them have the appearance of deep pits. The shell is white.

Apparently restricted to the island of St. Helena.