Fragile shell up to 4cm in length. Dirty white or brown in colour on the outside. The inisde is dark green and glossy. The surface is sculptured with fine concentric and radiating lines.

Conical shell up to 20mm in length (var. pellucidum tends to be smaller). Shell is brown or olive in colour and can either be tranlucent (var. pellucidum) or opaque (var. laevis). The surface of the shell is smooth with very fine radiating ridges. Conical shaped Var. laevis tends to have a thinker shell and more pronounced conical shape.

Up to about 16mm and almost round. White, yellow, brown, red or purple often with spots streaks or rays of deeper shades. Pallial sinus is a small indentation of the pallial line. The animal is greyish in colour and the mantle is spotted with brown.

Solid shell up to 3mm in length. The shell is white but usually obscured by yellow or brown periostracum which sometimes has darker streaks. The surface of the shell is sculptured with fine concentric lines.

Solid shell up to 6.5cm in length. White or cream shell with brown zig-zag lines on the surface; sometimes the whole shell is brown. Colouration may be partially obscurred by thick brown periositracum. The inside of the shell is white or dark brown. The surface of the shell is sculptured with very fine concentric and radiating lines.

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.