This article incorporates public domain text coming from New Zealand from the reference.
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Sculpture is coarser, like otagoensis, shape a cross between monilifera and skinneri Finlay, not so high as the former, not so elongate and parallel-sided as the latter, which is from the Chatham Islands (Trans. N.Z. Inst., vol. 59, p. 236, Fig. 59, 1928).