Shell solid, large for the genus (diameter > 18 mm in adult specimens), nearly as high as wide (H/D = 0.79-0.88), with trochoid profile and conical spire consisting of 7 flat-sided whorls, with suture barely evident. Base nearly flat, deeply umbilicate. Protoconch of barely 3/4 whorl, white, smooth, with a maximum diameter of about 210 mu. Teleoconch of 6 whorls; the first one with 3 smooth cords between the suture and the periphery, which become nodulose on the second whorl; there are 4 cords on the 5,h whorl and 5 on the 6th. Nodules rounded, pearly, different in size from one cord to another; subsutural cord with wider nodules than the others; the outermost cord with nodules a little more prominent, which gives the shell a carinated aspect, especially in juvenile individuals. Spaces between cords wider than the cords, with a fine spiral thread and very evident oblique striae. Base nearly flat, slightly convex, with 7 nodulose cords of different size and two smooth smaller cords close to the umbilicus; the nodules increase as they get closer to the umbilicus. Umbilical margin crenulated by 6-7 strong denticles. Umbilicus narrow and deep, with an internal callus. Aperture rounded, rhomboidal in juveniles; parietal region covered by a callused surface, wrinkled in adults, becoming a parietal tooth; inside of the outer lip with spirally aligned wrinkles and small nodules at its outer border. Columella sloping, with a fine triangular tooth on its upper part, 2 small teeth on its middle part, and another larger one on its base. The shell color is generally cream or dirty white with large axial opistocline blotches of dark brown or black. On the cords, white, cream, and brown nodules alternate. Base light colored, cream-beige without dark blotches, the nodules of the cords are brown, white, or beige; in some fresh specimens, the spaces between cords have a yellowish metallic color.
Dimensions: The largest adult studied, from Punta Eviondo, Rio Muni, was 15 mm high x 19 mm maximum diameter, it was somewhat depressed (H/D = 0.79). The smaller adult, Bata, Rio Muni, was 11 mm high and 14 mm diameter, and with a similar outline as the previous one (H/D = 0.79).
Operculum corneous, yellowish, multispiral, with a small central nucleus and 12 whorls.

Known from Rio de Oro, Sahara (old Villacisneros) to Angola. FISCHER (1887) mentioned this species from the Gulf of Guinea and Benguela (Angola); PILSBRY (1889) from Guinea, Gabon, and Liberia; DAUTZENBERG (1900) in Sahara (Cap Blanc); FONT Y SAGUÉ (1903) in Sahara and Morocco; HlDALGO (1910) in Equatorial Guinea (old Spanish Guinea); NlCKLES (1950) mentioned it from Sahara (Rio de Oro, Cap Blanc), Guinea Conakry (old French Guinea), Liberia, Gabon, Congo, and Sao Tome; BASSINDALE (1961) in Ghana (Prampran, Apam); TALAVERA (1975) in Mauritania, continental shelf, between 20 and 80 m; BERNARD (1984) recorded it from Gabon, in rocky bottom between 0 and 5 m; GOFAS, PINTO AFONSO 8C BRANDAO (1985) in Benguela, Angola.

Species sublittoral, with wide bathymetric range, living on rocky coasts, under rocks, between 0 and 80 m.