A: Ophiolimna sp. (Ophiacanthidae), lateral arm plate (LAP), Blake Nose (GZG.INV.78777). B: Ophiolimna bairdi (Lyman) (Ophiacanthidae), LAP, Recent, North Atlantic. C: Ophiohelinae gen. nov. (Ophiacanthidae), LAP (GZG.INV.78778), Blake Nose. D: Ophiotholia spathifer (Lyman) (Ophiacanthidae), LAP, Recent, Japan. E: Ophiohelinae gen. nov. (Ophiacanthidae), parasol spine (GZG.INV.78779), Blake Nose. F: Ophiotholia spathifer (Lyman) (Ophiacanthidae), parasol spine, Recent, Japan. G: Ophioleuce sp. (Ophioleucinae), LAP (GZG.INV.78780), Blake Nose. H: Ophioleuce seminudum Koehler (Ophioleucinae), LAP, Recent, Pacific. I: Ophiomusium sp. (Ophiolepididae), LAP (a: external, b: internal) (GZG.INV.78781), Blake Nose. J: Ophiomusium lymani (Wyville-Thomson) (Ophiolepididae), LAP (a: external, b: internal), Recent, North Atlantic. K: Benthopectinidae gen. nov., ambulacral (GZG.INV.78782), Blake Nose. L: Pectinaster filholi Perrier (Benthopectinidae), ambulacral, Recent, Atlantic. M: Benthopectinidae gen. nov., adambulacral (GZG.INV.78783), Blake Nose. N: Pectinaster filholi Perrier (Benthopectinidae), adambulacral, Recent, North Atlantic. O: Laetmogonidae gen. nov., body wall ossicle (lower side) (GZG.INV.45613), Blake Nose. P: Laetmogone olivacea Théel (Laetmogonidae), body wall ossicle (lower side), Recent, North Atlantic. Q: Hemisphaeranthos sp. (Myriotrochidae), body wall ossicle (upper side) (GZG.INV.45634), Blake Nose. R: Myriotrochus rinkii Steenstrup (Myriotrochidae), body wall ossicle, Recent, North Atlantic. S: (?)Myriotrochus sp. (Myriotrochidae), radial calcareous ring element (inner side) (GZG.INV.45623), Blake Nose. T: Myriotrochus rinkii Steenstrup (Myriotrochidae), radial calcareous ring element (inner side), Recent, North Atlantic. Scale bars equal 100 µm.