Dorsal or upper surface of empty sea urchin test (shell): The Heart Urchin known as a Sea Potato, Echinocardium cordatum (Pennant), upper surface of the empty test or shell without spines. Rhossili Bay strandline, Gower, South Wales, U.K. (3)
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Dorsal or upper surface of empty sea urchin test (shell): The Heart Urchin known as a Sea Potato, Echinocardium cordatum (Pennant), upper surface of the empty test or shell without spines. Rhossili Bay strandline, Gower, South Wales, U.K. (3)