The shell medium size, fusiform,rather thin, covered with light-brown periostracum, consists of 7 whorls. The protoconch is missing. The whorls are angled at the periphery or below it (on upper whorls). The subsutural slope is broad and weakly concave. Sutures are slightly wavy, shallow. Axial folds are low, reversed-sigmoid, they form strong rounded nodules below the subsutural slope and then rapidly weaken and become narrowly crested, but extend to the lower suture on the spire whorl and to lower part of the shell base. There are 15 axial folds on the body whorl and 13 on the penultimate. The subsutural slope is devoid of axial sculpture. Growth lines are mostly indistinct except those on the subsutural slope, but some are rough and raised. Spiral ribs are unequal in width and prominence, generally they are most closely spaced in intervals between peripheral nodules and further apart on the lower shell base and the canal. Two ribs on the upper shell base are raised and most prominent. The subsutural slope is covered with subobsolete, closely set ribs which are obsolete on some parts of the shell; there are also two shallow grooves in the middle of subsutural slope. The body whorl is large, occupying about 0.66 of the shell height. The shell base is almost flat, evenly curved in
transition to the canal. The aperture is oval, with the inner lip evenly curved and covered by a wide callus which bears oblique folds being the continuation of spiral ribs. The anal sinus is moderately deep, broadly V-shaped, with its apex being in the middle of subsutural slope. The canal is moderately long, slightly turned to left. The operculum is large, leaf-shaped, with terminal nucleus. H = 32.4, Hb = 21.6, Ha = 17.6, D = 13.0 mm.

The new species is similar to C. arcana (E. A. Smith, 1899) from Andaman Islands and Southern India (338-658 m) but differs in having a slightly larger shell with shorter and broader canal, shorter spire (its height is less than that of aperture plus canal), and long axials with characteristic reversed-sigmoid curvature and less strong and more numerous nodules.

Gulf of Aden