Plate 4

A, E, Ophiuraster symmetricus sp. nov; A, adoral and E, aboral aspect. B, C, D, Ophiomastus admiral sp. nov.; B, laeral aspect of arm; C, aboral and D, adoral aspects. F, H, I, Ophiacantha yaldwyni sp. nov.; F, aboral aspect; I, adoral aspect; H, spinules from upper side of disc. G, L, Ophiacantha abyssicola otagoensis var. nov.; G, aboral aspect of arm-joint; L adoral aspect. J. K, Ophiacantha rosea Lyman; J, jaw-region and K, spinules from up per surface of disc.