A typically circular specimen showing the oral surface with the three raised brachida radiating from the centre to meet the inward sloping radially ornamented margin. The original animal has the brachia curving in a clockwise direction. The anticlockwise direction in this specimen indicated that it is a lower surface external mould.
Size: 15mm diameter on block 40mm by 37mm
Size: 15mm diameter on block 40mm by 37mm