Roughly triangular in shape with concentric markings, up to 1 inch long. Striations very conspicuous. Trough shell species can be often distinguished by their length / width ratio - in this case approximately 1.4.
"The Beaches of Wales" is a comprehensive guide to every beach and cove around the entire coast of Wales.
Listing almost 500 beaches, this is an essential guide for visitors, watersports enthusiasts, walkers and anglers. For more information or to order, please click below -
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Roughly triangular in shape with concentric markings, up to 1 inch long. Striations very conspicuous. Trough shell species can be often distinguished by their length / width ratio - in this case approximately 1.4.