Shell solid, pyramidal, with seven to eight straight-sided whorls, with a slight peripheral keel. Sculpture of prosocline growth lines and spiral grooves and ridges, producing lozenge-shaped dimples. With or without narrow V-shaped umbilicus (C. miliaris-drawing).
Up to 18 x 18 mm but commonly 12 x 12 mm.
White, greenish or pinkish, often with pink or brown spots.
Snout without papillae, mouth I-shaped when closed; cephalic tentacles long, slender, with fine sensory papillae. Foot with papillate sides; three pairs of papillate epipodial tentacles, with basal sense-organs. Operculum pale yellow, polygyrous, with 11-13 turns.
Sublittoral only, 35-800 m, not uncommon on stone or gravel bottoms, less common on sand or muddy sand.
Distributed from Mediterranean north to Norway. More common in north of range, absent from eastern basin of English Channel (Distr. C. miliaris).