The shell is very large (maximum length 205 mm) and globose. The spire is moderate in height, consisting of two nuclear whorls and six or seven convex postnuclear whorls. The suture is partially to entirely obscured by the succeeding whorl. The body whorl is large and globose. The aperture is moderately large and ovate, with a moderately deep, broad anal sulcus, delimited parietally by a heavy spiral ridge. The outer apertural lip is erect and coarsely dentate: four or five wedge-shaped denticles occur on the shoulder portion of the outer lip, followed by a prominent notch, below which more typical labial dentition is the rule; the interior of the lip is barely lirate. The columellar lip is adherent and briefly spreading above (forming a small parietal callus), marginally detached and briefly erect below; three to five weak bumps or pustules occur at its anterior end. The siphonal canal is short to moderate in length, moderately broad, narrowly open at the right, and weakly, distally recurved.
The body whorl bears seven or eight varices. Other axial sculpture is generally lacking, al¬though in some specimens, some intervarical spaces are ornamented with nodose ridges. Spiral sculpture consists of ephemeral cords, which, as they cross the varices, are strongly elevated to form heavy, blunt, anteroposteriorly flattened, closed protuberances. The area above the shoul¬der margin lacks spinose ornamentation. The shoulder spine, much the longest, is followed by a gap. A series of low protuberances, increasing in length anteriorly, follows the gap. At the base of the body and extending onto the canal is a series of five short, sharp, open spines. The solid body-spines, representing the true varix, are set back some distance from the outer apertural lip. The entire shell is covered with a very fine micro-sculpture consisting of numerous dense, fine spiral threads, these minutely tuberculate.
The ground color of the shell is buff-brown. There are also three spiral brown bands, one at the shoulder margin, one medial, and one basal. The aperture is yellow-white within; the apertural margin is orange-pink. The margin of each varix is slightly raised above the shell surface, exposing the pink coloration of previous outer lips.

Southern Baja California and Mazatlan, Mexico, to Peru.