One side and the venter of adult internal mould showing the very characteristic virgatome ribbing extremely well. The specimen is slightly flattened and is complete apart from the last 1/4 whorl of body chamber. The umbilical seam however is complete and shows extreme uncoiling, indicating maturity, and the position of the peristome. From St Albans Head, Swanage, Dorset, UK.
Size: 55mm diameter on block 100mm by 70mm
Size: 55mm diameter on block 100mm by 70mm