« Shell minute, narrowly and deeply perforate. Spire conical; whorls: 9,5, joined by a margined suture; the first ones are smooth, the remnants are markedly carinate somewhat below the periphery, declive above the carina, almost straight below. In the last whorl, an other keel, stronger, encircles the convex and concentrically corded base. Aperture round; inside nacreous. Columella arched; labial margin sharp. Colour: variegated of white, brown, red and green. The keels are articulated with white and brown. […] Variant ex colore nigra, of a uniform black. » – P. Pallary: “Diagnoses de quelques coquilles nouvelles provenant du Maroc”, Journal de Conchyliologie vol. XLIX, Paris 1901, p.315.