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Lithostrotian bristolense

Lithostrotian bristolense

SKU: CCO 2.2
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A circular part of CCO 2.1 showing about 19 complete and 11 partial sharply-defined polygonal calices, each with a raised columella in the centre of a small pit, surrounded by many septa in excellent relief. From Failand, near Bristol.

Size: 46mm diameter