The central part of CCO 1.0. The upper surface of a fine rhomboid shaped, massive, cerioid, compound corallum, showing 15 complete calices and parts of several others. Each has a central pit with a pronounced raised columella surrounded by many septa in excellent relief, extending to the raised, polygonal calice walls. One calices has offsets produced by peripheral increase. From LLangollen, Wales.
Size: 60mm by 50mm
Size: 60mm by 50mm