The intensity of pigment varies on different individuals, but its pattern of distribution on pale specimens, such as this, is similar to that on darker ones. Pale specimens still have snouts that are darker laterally (1) than dorsally, the sides of the body (2) are pigmented less intensely than the dorsum , and the dorsal surface of the foot (3) has pigment darker than the sole . On both dark and light specimens, the whitish mantle is often brownish near its edge (4) and greyish where it forms the posterior of the mantle cavity roof (5); and the rim of the aperture sometimes has some purple that may be shared by the mantle. Bretagne, France. © Marc Cochu.
10 Rissoa membranacea.
