Volume Iv.

SPIDERS, MITES, ETC., C. Warburton, M.A., Christ's College (Zoologist to the Royal Agricultural Society); SCORPIONS, TRILOBITES, ETC., M. Laurie, B.A., King's College, D.Sc. (Edinb.), (Professor of Zoology in St. Mungo's College, Glasgow); PYCNOGONIDS, ETC., D'Arcy W. Thompson, C.B., M.A., Trinity College (Professor of Zoology in University College, Dundee); CRUSTACEA, W. F. R. Weldon, M.A., F.R.S., St. John's College (Jodrell Professor of Zoology in University College, London).