Cymatium labiosum (Wood, 1828)
Description: Body whorl bears 4 strong spiral ribs; the three below the shoulder each consist of 3 beaded riblets, the central one the largest. Shoulder rib consists of two such three-part ribs, closely spaced, but diverging on the outer lip. Shoulder with about 6 weak spiral ribs. Axial sculpture is strong ribs, about 9 on the body whorl, forming nodules where they cross the spiral sculpture. Outer lip thickened, with about 5 teeth, columella with one weak tooth anteriorly. Anterior canal nearly closed, upturned. Colour fawn, covered with a thin yellow periostracum when alive; Interior white. Operculum oval.
Size: Up to 39 mm in length.
Distribution: Indo-West Pacific and tropical eastern and western Atlantic. In Australia, from Fremantle, WA to Twofold Bay, NSW.
Habitat: Intertidal on rocky shores, and subtidally, down to 75 m. Uncommon.
Comparison: This species can be distinguished from Cymatium exarata by the three-part ribs on the body whorl.
Synonym: Triton strangei, Adams & Angas, 1864
Figs. 1,2: Shark Island, Sydney Harbour (C.007858)
Copyright Des Beechey 2000