A complete adult internal mould fully developed on both sides showing excellent detail of the sutures including the last. The body chamber occupies 2/3 whorl. Shows prominent uncoiling of the umbilical seam & features the characteristic median ventral row of blunt coxcomb serrations. A lateral lappet is present on one side. From St Ives, Cambridgeshire, UK.
Size: 19 mm diam
Size: 19 mm diam