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Echinoderms from Southern New Zealand

Ophiactis Luetken, 1856

Ophiactis Luetken, 1856

Ophiactis resiliens Lyman, 1879

  • Island Bay Shelf, ca. 10 fathoms, on rock from sea-bed tangled in fisherman's trawl, July, 1950; C. A. Fleming; two specimens.
page 23

Ophiactis profundi Ltk. & Mrtsn., 1899

  • Island Bay Shelf. 10 fathoms (as above); five specimens.

Neither of the above species has spines on the disc; they are separable easily by the fact that the former is regularly five-armed, the latter six-armed, and transversely fissiparous, having usually three large and three small arms.