1: large, recurved penis attached behind the right tentacle; translucent white with a dark genital duct (extent of darkness varies). 2: tip of dark filament of penis.
3: slender tip of ctenidium (gill). 4: osphradium (tests water quality of inhalent current). 5: translucent, white pallial tentacle at adapical angle of aperture. Shell height 9.5mm. Littoral, ELWS. Orkney, Scotland. April 2018. Leg. I. Williamson.

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