A superb large adult phragmacone internal mould, developed on both sides and retaining some test, with the umbilical seam indicating the preious 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 prosiradiate ribbing with stronger secondaries producing a crenulate venter. from Yorkshire, UK.
Size: diameter 175 mm, width 98 mm
Size: diameter 175 mm, width 98 mm