A superb complete adult internal mould, developed on both sides showing 6 whorls. Sutures including the last are visible and the complete body chamber occupies 3/4 whorl, shows uncoiling of the umbilical seam, has a terminal constriction and flare and a complete peristome with both lappets, each 23 mm long. The strong ribs show well, bifurcating high on the sides with the secondaries passing uninterruptedly over the venter. From England, UK.
Size: 99 mm diameter
Size: 99 mm diameter