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Lamarck, 1816

Body usually 20-75 mm long, sometimes more; mouth with 7 rings each of 5 teeth. Introvert 0.2-0.3 mm of total body length, marked by 25 longitudinal ridges. Rest of body with numerous rings. A tail arise ventrally to the anus, bearing numerous vesicular branches; base of tail sometimes partially enclosed through a swelling of the body.

In grey mud, from the mid-shore into the sublittoral.

Scandinavia; circumarctic.

Priapulus caudatus