Similar to N.arcularia in size and sculpture but more ovoid in shape with less prominent nodes at the body whorl suture and obsolete axial ribs on the last whorl, with the exception of 4-6 crowded axial on the back of the outer lip, protoconch of 24-3½ finely carinate embryonic whorls, carina frequently worn away; columellar callus smaller and narrower than in N.arcularia, not expanding laterally and with the edge usually fused to the body whorl. Mature specimens with small sharp den- ticles on the edge of the outer lip. Creamy-white, golden-brown, greenish or dark brown in colour, occasionally with paler spiral bands and a darker stain between sutural coronations, and conspicuous slightly irregular whitish lines within the colour pattern. Operculum brown and serrate on margins.