Left: three views of 4.1mm high shell occupied by contracted, cream, live animal seen through translucent white shell.
Right: two vacant shells, heights 4.3mm and 3.8mm.
Usual adult height in Britain to 6 mm. Rare extreme maximum 7 mm.
Inner (columellar/parietal) lip has only 2 protrusions within the aperture.
Outer (palatal) lip has no protrusions or rib (sometimes in a photo, a strong growth line might be mistaken for a rib).
Sutures shallower and whorls less rounded than on M. myosotis.
Flesh colour of normally extended dorsal body is amost pure white, but when contracted into body-whorl, colour saturation gives it a cream appearance.