Up to 15mm long, 14mm high, 10mm wide, solid, plump, almost equilateral. 22-27 radial ribs, flattened with narrow pitted grooves between.

Solid shell up to 8cm in length. The outside of the shell is white tinged with grey. The insde is also white but glossy and can be brown in the centre. The shell gapes to the posterior end.

Thin shell up to 3mm in length. The shell is translucent but obscured by cream coloured periostracum. The surface of the shell is sculptured with radiating ribs crossed by crenulated concentric ridges.

Conical shell up to 10mm in length (4mm in height). The shell is yellow-grey in colour. The surface sculptured with fine radiating ridges and concentric lines. The animal does not possess eyes.

Fragile shell up to 1.5cm in length.The outside is white in colour tinged with pink. The inisde is white and glossy. The surface is sculptured with irregular concentric rings.

Brittle shell up to about 2.5cm in length. Dirty white or fawn in colour. Inside white or cream often with purple stain. The degree of distortion and sculpture of the shell depends on how tightly the specimen was wedged in the cavity in grew in. The frill like concentric ridges can be very prominent.

Brittle shell up to about 5 cm in length. Dirty white in colour. Shell surface is rough sculptured with irregular concentric ridges and fine radiating lines. Cruciform muscle scars sometimes clear. Deep pallial sinus which is partially confluent with the pallial line.

Brittle shell up to 1.5cm in length. The inside of the shell is white and the outside is white or light brown. The surface of the shell is sculptured with radiating ribs and concentric lines. The margin of the shell is crenulated.

Solid shell up to about 1.5cm in length. Glossy shell, red-chestnut brown in colour often with rays or paler patches. Inside similar colour but brighter. Shell surface sculptured with concentric lines. Pallial sinus almost reaches the midline and is partially confluent with the pallial line.