Arrows indicate inhalent current entering via passages between head and parapodia, and exhalent current exiting from mantle cleft at subsutural split in shell. Even when tightly wrapped around the body, the anterior ends of the parapodia are held ajar for the admission of the respiratory water current.
© H. C. Marshall. Length 25 mm. Epithelium grey overlaid with light and dark blotches and, on cephalic disc, dark streaks. Fleet lagoon, Dorset, England.
© J.C.A. Craik. Larger specimens have a darker epithelium. Soakaway pond of aquarium, Oban, Scotland. April 2010.

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