Shell oblong-fusiform, solid, yellow or ochreous-brown; whorls 8-9, of which the two nuclear are smooth, globose, blunt at actual apex, the remainder suturally impressed, angled, longitudinally multicostate; costae smooth, crossed by obscure spiral lines on the body-whorl, more particularly towards the base. Whorls ornamented with spiral rows of white beaded gemmae just below the sutures, and again in several regularly arranged rows on the ribs, and towards the base of the body-whorl. There is, in the examples seen by us, some extent of variation in the disposition of these gemmae, and likewise in the number of ribs. The mouth is ovate, outer lip slightly rounded in the largest specimen, straighter in the smaller, and with sinus shallow but well expressed. Columellar margin straight, canal very short, slightly recurved basally.
Long. 21, lat. 8 mm. sp. maj.; long 17, lat. 5 mm. sp. min.
Hab.—Mauritius.
This species exists, unnamed, in our National Museum. It is of the same alliance as D. digitalis, Reeve, from the Philippine Isles and Mauritius, and D. ochroleuca Melv. & Sykes, from the Andamans (Booley collection).