Volume Iv.

CRUSTACEA, by GEOFFREY SMITH, M.A.; TRILOBITES, ETC., by H. WOODS, M.A.; LIMULUS, LINGUATULIDA, AND TARDIGRADA, by A. E. SHIPLEY, M.A., F.R.S.; SPIDERS, MITES, SCORPIONS, ETC., by C. WARBURTON, M.A.; PYCNOGONIDS, by D'ARCY W. THOMPSON, C.B., M.A.

PERIPATUS, MYRIAPODS, AND INSECTS–PART I.