As Muricopsis muricoides:
The shell is small (maximum length 11 mm) and roughly fusiform or biconic. The spire is high, consisting of one or one and one-half keeled nuclear whorls and four convex postnuclear whorls. The suture is weakly impressed to indistinct. The body whorl is of moderate size, fusoid, and strongly constricted above the canal. The aperture is small, cmarginate, and subovate, the posterior margin flattened; the anal sulcus is deep and narrow. The outer apertural lip is thickened, erect, and coarsely serrate; its inner surface bears five strong denticles, the strongest being the second from the anal sulcus. The columellar lip is entirely adherent and bears a number of pustules, apparently reflecting the nodulose sculpture of the shell's outer surface. The siphonal canal is short, narrowly open, and bent to the left.
The body whorl bears eight apparent varices, these extending, as low axial ridges, from the suture to the tip of the siphonal canal. Spiral sculpture consists of eight major cords, six on the body and two on the canal, each cord divided into three parts by two fine transverse grooves; a single thread separates each major cord from its neighbor. Where the major cords cross the varices, moderately large, nodulose swellings are developed.
Shell color is red-brown to yellow-brown; the spiral cord at the shoulder margin, one at the midpoint of the body, and two on the canal are white (on the other cords only the nodules are white). The aperture reflects the brown and white banding of the outer shell surface.
Caribbean Sea: Jamaica to Panama and Barbados.

Distribution: Texas, Florida; West Indies. Size: 15 mm.
Description: Color of axial ridges purplish-brown, inner spaces cream-white, protoconch cream-white, inner aperture white; shape pearlike, conic; sculpture of axial ribs intersected by strong spiral cords, producing heavy nodules at intersection; spire bluntly acute; aperture long and somewhat narrow, inner area of outer lip with 4 to 5 strong, short, rounded plicae; siphonal canal short and wide; columella smooth and narrow.
Habitat: Under rocks in sand bottoms. Depth range 0 to 219 m (718 ft). Remarks: See Vokes and Houart (1986). Synonym: Ocenebra muricoides (C. B. Adams, 1845).