09 Rissoa membranacea.

09 Rissoa membranacea.

The ground colour of the flesh is whitish, translucent, and it is extensively covered by various shades of grey to brown-black pigment dorsally, with opaque white spots on the foot. 1: ctenidium (gill). 2: osphradium (tests water quality of inhalent current). Shell height 4.9 mm. Orkney, Scotland. May 2017. Leg. S. Taylor.

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