A fine block with 8 complete specimens. Four show the exterior of the convex dorsal valve with many costae and concentric growth lamellae, and four show the interior of the ventral valve with hinge line, hinge teeth and costae. The largest specimen measures 10 mmx 7.5 mm. From Bristol, Avon.
Size: 25 mm x 40 mm
Size: 25 mm x 40 mm