Cut Trough Shell (Spisula subtruncata)
|Bonnet Shell||Common Limpet|
|Black Footed Limpet||China Limpet|
|Slipper Limpet||Common Tusk Shell|
|Cowrie Shell||European Cowrie|
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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.