Shell more cylindrical; aperture relatively smaller and rounded. 3 - 4 very small deeply-set apertural teeth, 1 parietal, 1 columellar, 1 lower palatal (sometimes absent, and sometimes an additional upper palatal). Mouth edge simple and scarcely thickened. Shell pale yellowish-brown, translucent, not glossy, but with a silky sheen due to many reguler fine growth lines.

Typically 1.9-2.2mm in height. Shell relatively broad, almost ovoid; with 5 strongly tumid whorls, the last well-rounded and relatively large; mouth-edge delicate, with a transverse furrow just before the aperture.

Whorls strongly tumid; mouth edge thinner and convex with no transverse rib behind the outer lip; apertural teeth simple and peg-like, arising without surrounding callus; colour pale reddish-brown; shell glossy, with fine regular growth-lines.

Typically 1.7mm to 2.1mm in height. Shell rather barrel-shaped; mouth edge scarcely thickened, outer lip just perceptively reflected. No external rib or flexure behind lip. Mouth rather rounded, without teeth, or occasionally with a vestigial parietal denticle only. Shell pale reddish-brown, very smooth and glossy.

Aperture with 6 - 10 prominent teeth including at least 2 parietal, 2 columellar and 2 palatal. Mouth edge slightly thickened and reflected; the outer lip has a markred central indentation. Shell ovoid; dark chestnut-brown with a few feeble growth-lines.

Typically 1.8-2.0 mm in height. Whorls moderately tumid; mouth-edge slightly thickened and slightly indented, with no transverse rib behind the outer lip (cf. V.pygmaea); apertural teeth lamella-like, with very little callus around the bases; colour pale yellowish-brown; faint, regular sculpture, giving a characteristic silky lustre.

This is considered by some workers to be but a variety of C.

Solid shell up to 10cm from beak to margin. The shell is yellow, pale green or brown in colour sometimes with pink or purple markings. The upper valve is sculptured with concentric lines and grooves which are sometimes lifted into scales. Radiating ribs are also present.

Solid shell up to about 20cm in length. Dark blue or purple in colour bu this is generally obscured by dark brown periostracum. The inside of the shell is white. The surface is sculptured with fine concentric rings and ridges.

Large teardrop shaped shell up to 100mm. Spire blunt, 5-6 very rounded whorls. Shell white or cream, porcellaneous, nearly smooth. Periostracum thin, may be rubbed off. Mouth oval, no siphonal canal, thin nacreous callus extends over last whorl, outer lip flared widely in adults.