Solid wedge shpaed shell up to about 10cm in length. The outside is purple, blue or brown in colour; the inside is pearl white bordered with purple or blue. The surface is sculptured with concentric rings.

Solid wedge shpaed shell up to about 15cm in length (though exceptionally may be bigger). The outside is purple, blue or brown in colour; the inside is pearl white bordered with purple or blue. The surface is sculptured with concentric rings.

Chalky white, fragile shell, up to about 4cm in length. Almost round. White to light yellow in colour. Sculpture of fine, sunken, concentric lines. Left valve three cardinal teeth; right valve two. No laterals. Orange siphons widely separated.

Fragile shell up to 3mm in length. It is white to translucent in colour. The surface is sculptured with fine concentric lines.

Solid shell up to about 8cm in length. The outside is dirty white to fawn in colour; the inside white. The surface of the shell is sculptured with numerous concentric lines. The right valve is very slightly larger than the left and the shells gape at the hind end. The pallial sinus is broad an deep.

Solid shell up to about 15cm in length. It is quite variable in appearance (possibly party due to growing in different salinities). The outside is dirty white to fawn in colur; the inside is white. The surface of the shell is sculptured with concentric rings and a few radiating lines. The right valve is slightly larger than the left and the shells gape at the hind end.

Brittle shell up to 5cm in length. The shell is dark brown in colour but obscured by brown periostracum (tends to appear black in older specimens). The inside of the shell is pearly tinged with blue or brown. The surface is sculptured with obvious concentric lines crossed with ribs in the anterior and posterior regions. The margin of the shell is crenulate where the ribs are present but smooth elsewhere.

Brittle shell up to 1.5cm in length. The shell is yellow brown in colour but this is obscured by thick green or brown periositracum. The inside is generally white but sometimes pale purple. The surface of the shell is sculptured with fine concentric lines and radiating ribs. Margin of the shell is crenulate.

Brittle shell up to 1.5cm in length. It is dirty white in colour marked with purple brown streaks. The inside of the shell is pearly and sometimes dark brown. The surface of the shell is sculptured with fine concentric lines and ribs in the anterior and posterior region of the shell. The margin is crenulate where there are aribs but smooth elsewhere.

Fragile shell up to 3mm in length. White to translucent both inside and outside. The surface of the shell is sculptured with radiating ribs and faint concentric lines.