Shell elongate-pyramidal, white, spotted with brown between the nodules. Whorls 16, straight at the sides, encircled above at the suture with a prominent series of acute tubercles, and below these by two or three other rows, which are much less elevated and distinct; they are also spirally striate-sulcate. The body-whorl has a swelling (scarcely a varix) on the left side opposite the outer lip, terminates in a narrow and much recurved canal, and is sculptured with about ten narrow sulci. Columella bearing a conspicuous callus reflexed over the cauda, and armed within with a single submedian plait. Aperture oblique, produced above into a short, narrow channel. Labrum only a very little thickened. Length 30 mm., Diam. 9 mm.
Seychelles, in 4-12 fms., and Cerf Island, Mascarenes, in 10 fms.
This species bears some resemblance to C. articulatum, Adams and Reeve, especially as regards the aperture. It may be distinguished by the prominent row of acute nodules just below the suture, the corresponding series in C. articulatum being smaller, so that the whorls at this part are narrower than below, whilst, on the contrary, in the present species they are widest.

Rhinoclavis articulata (Adams and Reeve, 1850). (Synonym: Vertagus graniferus Pease, 1861b.) Length, 46 mm; diameter, 12 mm. Shell: conic-elongate, slender; solid; with sharply granular spirals and a prominent varix on the last whorl; cream spotted with dark brown. Spire: teleoconch of twelve whorls; suture indistinct. Sculpture: beaded spiral threads separated by interspaces of equal diameter, the subsutural spiral wider than the others and with sharp plaits. Aperture: ovate; outer lip thin, barely fluted; columella with a single plait and a heavy enamel shield; siphonal canal elongate, recurved. Color: fawn with splashes of lighter and darker brown.
These cerithids are common in sand at depths of from 1 to 160 m. This species occurs throughout the Indo-West Pacific.