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.

Brittle shell up to 2.5cm in length. The shell is white but obscured with a cream periostracum. The inside is also white. The surface is sculptured with faint concentric rings.

Brittle shell up to 2cm in length. The shell is white in colour but obscured by a brown periostracum. The inside is white, sometimes with a blue tinge. The surface of the shell is sculptured with faint concentric lines.

Brittle shell up to 1cm in length. The shell is white in colour but can appear translucent. The surface is obscured by a brown periostracum. The surface of the shell is sculptured with radiating ribs and concentric lines

Solid shell up to 17cm from beak to opposite margin. It is dirty white to brown in colour, occasionally with purple markings. The surface of the shell is sculptured with concentric ridges and lines.

Up to 35mm long, 40mm high, 35mm across, plump, roundish. Juveniles longer than high. 32-38 ridged close-set radial ribs, sometimes obscure towards the posterior, crossed by concentric striations and growth lines. Periostracum grey and thick. Teeth small, sharp. Margin crenulated, with fluting on the inside extending about 1/5 of the way into the shell. Greyish yellow with narrow concentric bands of darker colour. Inside off-white.

Brittle shell up to 2.5 cm in length. It is white, yellow, brown, pink or orange in colour. The surface is sculptured with broad ribs interspersed with finer ones all of which are covered with tubercles. Concentric lines are also present.