A fine almost complete adult internal mould showing the sutures in strong relief. The body chamber is almost complete, shows uncoiling of the umbilical seam and occupies about 2/3 whorl. It shows the strong ribbing well with bifurcating secondaries which are interrupted by a ventral sulcus in the early part and pass uninterruptedly over the venter in the later part.
Size: 67mm Diameter
Size: 67mm Diameter