A fine, beautifully preserved almost complete adult internal mould, developed on both sides. The body chamber occupies 3/4 whorl and shows pronounced uncoiling of the umbilical seam over the last 1/4 whorl. The last suture is visible and the coarse, wiry biplicate ribs show in strong relief. From Peterborough, Cambridgeshire.
Size: 105 mm
Size: 105 mm