Solid shell up to about 2.5cm in length. The outside is dirty white in colour; the inside is white. The surface is sculptured with obvious concentric ridges and grooves.

Thick solid shell up to about 4.5cm in length. The outside is dirty white in colour and the inside white. The pallial sinus reaches to the posterior end of the chondrophore. The surface is sculptured with concentric grooves but it still appears smooth.

Solid or brittle shell up to about 3cm in length. The outside is dirty white in colour and is white inside. The pallial sinus reaches to about half way along the lateral tooth. The surface is sculptured with concentric rings.

Brittle shell up to about 1.5cm in length. The right valve is slightly larger than the left. Both inside and outside of shell is white. The surface of the shell is sculptured with fine concentric lines (?and irregular concentric undulations). The pallial sinus is deep.

Straight sided shell up to about 12cm in length. Yellow in colour with light brown periostracum. Shell sculptured with smooth concentric lines and prominent groove just behind the front margin, Growth stages clear.

Solid shell up to 6cm in length. Yellowish white in colour; inside is white. Periostracum light green or yellow. Sculpture of concentric rings and radial ribs. Pallial sinus relatively deep and is confluent with the pallial line for much of its length.

Thin, fragile, shell up to 1cm in length. It is white, yellow, grey or light brown in colour sometimes displaying irregular patterns. The surface lacks ribs but is sculptured with fine concentric and radiating lines.

Fragile shell up to 3mm in length. The shell, both outside and inside, is whote to translucent in colour. The surface is sculptured with fine concentric lines.

Solid shell, but thin, up to about 6 cm in length. Shell not glossy and grey, light yellow or light brown in colour. Surface of shell is sculptured with irregular concentric lines. Pallial sinus relatively deep and its edge is partially confluent with the pallial line.

Fragile shell up to 1cm in length. The shell is coloured white both outside and inside? The surface is sculptured with fine concentric lines.