A very fine, complete, isolated, solitary trochoid corallum with an oval cross section. The shallow calice shows the prominent axial structure comprising a medial plate with sharp ridges, surrounded by many septa in excellent relief. The exterior shows concentric growth rugae and many septa radiating from the apex. From Brentry near Bristol.
Size: 22mm by 32mm by 33mm
Size: 22mm by 32mm by 33mm