Range: N. Indian Ocean (India, Sri Lanka. W. Thailand. Indonesia) and W. Pacific (S. Philippines to Solomon Is.).

Description: Moderately small to medium-sized, moderately light to moderately solid. Last whorl ventricosely conical to conical; outline variably convex. Shoulder subangulate. Spire of moderate height: outline straight to slightly concave. Larval shell of about 3.25 whorls, maximum diameter 0.8-0.9 mm. First 2-4 teleoconch whorls tuberculate. Teleoconch sutural ramps flat. with 1 increasing to 6-9 spiral grooves. Last whorl with often granulose spiral ribs near base.

Ground colour white. Last whorl overlaid with broad olive. orange or dark brown spiral bands, leaving only a white central band and a spiral row of white blotches at the shoulder; central band edged by dark brown dotted and dashed spiral lines. Last whorl variably encircled with darker spiral lines or spiral rows of dots and dashes. Larval shell pink. Postnuclear sutural ramps with brown radial streaks and blotches. Aperture bluish white to light violet.

Periostracum olive. thin, translucent, with radial ridges on the sutural ramps.

Habitat and Habits: In 2-50 m, in dark silty sand (Solomon Is.).

Discussion: C. cumingii may resemble C. fumigatus and C. sazanka in shape and colour pattern C. fumigatus in its more conical last whorl (PMD 0.87-0.95). angulate shoulder, and in the weaker spiral sculpture on the late sutural ramps as well as on the basal part of the last whorl. C. sazanka usually has a narrower and often more conical last whorl (RD 0.56-0.63: PMD 0.86-0.93), it lacks dotted and dashed spiral lines on the last whorl, and its larval shell comprises more whorls (4 vs. 3.25).