A superb large adult phragmocone internal mould, developed on both sides and retaining some test, with the umbilical seam indicating the previous existence of another whole whorl. The last 1/4 whorl of seam shows uncoiling. A variant of intermediate inflation, which is highly variable in this species, ranging from discoidal to globular. A highly attractive evolute specimen showing faint ribbing with stronger secondaries producing a crenelated venter. From England, UK.
Size: 175 mm diameter 98mm wide
Size: 175 mm diameter 98mm wide