V.—Two New Species of Eurypterus from the Coal-Measures of Ilkeston, Derbyshire

By the kindness of Mr. Henry A. Allen, F.G.S., of the Geological Survey of England, three examples of Eurypterus, in clay-iron-stone nodules, showing impression and counterpart, together with a fragment of a fourth example, all from the Coal-measures to the north - west of Ilkeston, have been most obligingly lent me for description by their discoverer, Dr. L. Moysey, M.A., of St. Moritz, Ilkeston Road, Nottingham.