A very fine large complete adult internal mould developed on both sides with the strong ribbing showing well to the end. The last suture is visible and the body chamber which occupies exactly a whorl, shows uncoiling of the umbilical seam, has a terminal collar and flare and a complete peristome. Microconch of P. paranderieri. From Headington, Oxford, UK
Size: 215mm diameter
Size: 215mm diameter