Ophiomusium canaliculatum H. L. Clark, 1917 .

Figures 7 a, b

Holotype USNM E000035, Albatross 1909, station 4732 North Pacific 344m.

Main Features: Disc surface entirely rugose. Few disc plates, large radial shields and dorsal marginal plates. Oral shields diamond-shaped. Oral papillae not separated. Two exposed tentacle pores, no tentacle scales. The disc plates have sunken marginal bands of anastomosing crystals, which may be artefacts resulting from preservation.