A superb large well preserved almost complete adult with 6 whorls, with test on one side and most of the venter. Both sides are fully developed, sutures including the last are visible and the body chamber occupies just over 3/4 whorl, and shows strong uncoiling of the umbilical seam. The strong ribbing fades over the last 1/4 whorl. From South Petherton, Somerset, England, UK.
Size: 190 mm
Size: 190 mm