The two upper snails.
By the microscope are seeing: 1. Well developed principalis (goes little more farther than lunulla's end).

1. Weak suturalis ending 2-3 mm before the principalis.
2. Well developed spiralis starting little before the end of parietalis.
3. Weak parallelis starting little after the lip of the apertural opening.
4. Moderate principalis.
5. Columellaris forked.
6. Subcolumellaris visible from the aperture.