Author: GIRTY, G.H.
Title: A revision of the sponges and coelenterates of the Lower helderberg Group of New York. [Devonian]
Description: 1894. Geol. Surv. New York, extract 48th Ann. Rep. New York State Museum; pp. 259-322, 7 plts. h.t. Orig. extract, plain new wrps. very good.

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