One side and the venter of a natural negative external mould, reversed out to give a positive external cast. A very fine complete adult with some of the final peristome preserved. The primary ribs are widely spaced and the secondaries are almost wholly separated. The last 1/3 whorl shows strong uncoiling of the umbilical seam and the crenelated keel is prominent. From England, UK.
Size: 41mm diameter
Size: 41mm diameter