Think solid shell up to 10cm in length. The shell is yellow-white in colour but this is usually obscured by a dark red-brown periostracum. The periostracum has short, firm hairs in lines radiating from the beaks. The pallial line shows no indentation for the pallial sinus.

Fragile shell up to 2.5cm in length. The shell is dull white in colour both outside and inside but the outside is obscured by brown perisotracum. The surface of the shell is sculptured with $incised concentric lines?$

Thin, but solid, shell up to about 2.5cm. Yellowish white with pink red or violet radiating rays. Exterior colouration repeated on the interior. Glossy with fine concentric ribs and radiating lines.Slight gape at each end. Siphons long and separate.

Solid but thin shell up to about 5cm in length. Colour white, yellow, pink or red often combined to display radiating rays but generally obscurred by a partial cover of a dark green epidermis (periostracum) . Inside of shell white, pink or purple and generally whiter towards the edges. Surface of shell sculptured with well defined concentric ridges crossed by around eight radiating ribs. Pallial sinus relatively deep with border partially confluent with pallial line. ? Check glossy or not?

Solid shell up to about 6.5cm in length. White or cream often with pink or purple radiating rays. Inside purple or yellow. Partially covered with a dark green/brown epidermis. Glossy. Sculpture of concentric lines and very fine radiating lines.

Brittle shell up to about 2.5cm in length. Colour white or pink often with patches/rays of purple or red. Inside similarly coloured. Sculpture of fine concentric ridges and up to about 20 sharp ridges running towards the hind margin.

Fragile shell up to about 2cm in length. Glossy white, yellow or orange in colour. Sculpture of concentric rings with diagonal striations on the right valve. Relatively deep pallial sinus which is confluent with the pallial line. Cruciform muscle scars indistinct.

Fragile shell up to 1mm? in length. It is coloured yellow to white both inside an out. The surface of the shell is sculptured with concentric and radiating lines.

Elngate shell up to about 21cm in length. Both dosal and ventral edges of the shell are straight. White or creamy white in colour with red-brown streaks streaks. Periostracum dark green to yellow-green. Shell sculptured with smooth horizontal and vertical lines with clear growth lines.

Slender shell up to about 10cm in length. Edges curved and parallel, tapering towards the posterior end. Creamy white in colour with red-brown streaks streaks. Periostracum dark green to yellow-green. Shell sculptured with very fine horizontal and vertical lines with clear growth lines. Foot is reddish in colour.