Each group of cerata arises from a raised mound of the notal ridge. As on the rest of the body, the cerata, apart from the apex, have a translucent purple integument. The, usually bright red, digestive gland shows clearly through it.
Black internal eyes resting on the circum-oesophageal nerve ring are visible behind the rhinophores.
Length 10 mm, Menai Strait, Wales, April 2011. Leg. D. Evans.