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Deep-Sea Echinoderms of New Zealand

[Introduction]

This family is new to the New Zealand fauna, although it is known from Australia by a single species. It may be diagnosed as follows:

Tube-feet in two series. Rays more or less constricted at the base, usually numerous, sharply demarcated from the small central disc, and usually deciduous when handled. Abactinal skeleton of rays restricted to basal part. Long, slender marginal spines encased in skin, with numerous small adherent crossed pedicellariae.