Ophiomusium constrictum Mortensen, 1936 .

Figures 8 a, b

Holotype BMNH 12-30-1477, Discovery Expedition 1936. WS 871, southwest of Kerguelen Is, 336– 341 m.

Main Features: Mortensen’s description is mostly accurate, but he neglected to note the presence of small dorsal arm plates in the first 3 or 4 segments. There are 2 pairs of exposed tentacle pores, and genital slits run parallel to the first arm plate and are separated from it. The oral shield is very small, the arms are distinctly moniliform, and the disc plates are distinct and higher than the radial shields. The marginal disc plates protrude slightly.