When extended, outline is slender (see image 02)  but here it is contracted to a stouter shape. The smooth brick-red surface has up to 50 irregularly wavy, white, longitudinal ridges which are more or less continuous for the length of the mantle; strong ones alternating with weaker ones. The mantle has a whitish peripheral border with repugnatorial glands on its ventral face. Length 19.4 mm. Sublittoral, Orkney, Scotland. May 2017. Leg. S. Taylor.

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