of the shell are elongated and reach a length of up to . The two sides are straight and parallel. The color is creamy white, sometimes with brownish stripes, and the
periostracum is olive green. It is sculptured with fine lines and growth marks can be seen. The anterior end is truncated while the posterior end is rounded. It has a very large foot and is capable of burrowing in the fine, hard-packed muddy sediments that it favours. where it is associated with the starfish (
Astropecten irregularis) and the common otter shell
(Lutraria lutraria). ==Distribution and habitat==