The shell is large for the genus (maximum length 29 mm), triangular in cross section, and broadly biconic. The spire is high and acute, consisting of five or six essentially convex postnuclear whorls and a protoconch of undetermined nature1. The suture is weakly impressed where not obscured. The body whorl is large and broadly trigonal. The aperture is moderately small and ovate, and the peristome is erect, except parietally, where it is adherent, and serrate at the outer apertural margin. Each anal siphonal tube is coalescent with a shouldermargin spine, the spine originating midway between varices and swinging ventrally and posteriorly to its tubular apex. The siphonal canal is broad, of moderate length, and sealed, except for a short distance as it turns sharply dorsally. The body whorl bears three broadly winglike varices; other axial sculpture is lacking. Spiral sculpture, in addition to the threads on the dorsal surface of the shouldermargin spine, consists of 12 cords, three on the canal and nine on the body; the cords are ephemeral intervarically but terminate as more or less strongly developed ruffles at the varical margin, the uppermost three crowded on the anterior flank of the shoulder spine. A strong, oblique ridge extends from just below the shoulder margin in front of the preceding varix to a point medial on the current varix, to form the two strongest ruffles. Portions of the dorsal surface of the varix, between the shoulder spine and the ridge and anterior to the ridge, appear sunken by contrast with the raised features. The cords are also apparent on the leading edge of the varix, and the cord interspaces on die outer surface of the outer apertural lip are comparatively depressed; on each preceding varix these depressions appear as a single axial row of deep pits. Shell color is translucent blue-white or white, with a lustrous white aperture. The entire shell is covered by a flat-white, minutely axially frilled intritacalx.

Known to us from the Bahamas and reported in the literature (Gertman, 1969) from off the Yucatan Peninsula and the Caribbean coast of Panama.