The cephalic tentacles are translucent white with, on mature adults, crowded, randomly arranged, opaque, white spots ; see image 16 .The spots are less crowded on younger specimens, such as these, but are usually not arranged in one or two well defined lines. Shell heights 7.4mm (left) & 4.9mm (right). Orkney, Scotland. May 2017. Leg. S. Taylor.
17 Rissoa membranacea.
