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Class: Bivalvia. 10 specimens. 8 have both valves still attached, 1 right and 1 left valve that are almost certainly from the same animal and were likely attached. Fairly small, sub-triangular in shape with very well defined concentric ribs. Varies in colour through whites, yellows, pinks and purples with thick bands of colour radiating from the umbo. Found in coarse gravels in the sublittoral to depths of about 100 m.