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Show xii Page JACOBY, MARTIN, F.E.S. Descriptions of N ew Species of Coleoptera of the Family Ualticidce from South and Central America. (Plate XX.) 171 JAMESON, H. LYSTER, M.A., Ph.D., Municipal Technical College, Derby. On the Origin of Pearls. (Plates XIV.-XVII.) 140 KIRBY, W. F., F.L.S., F.E.S., Assistant in the Zoological Department, British Museum (Natural History), South Kensington. List of a small Collection of Orthopterous Insects formed by Sir Harry Johnston in British East Africa and Uganda in 1899 and 1900, with Descriptions of five new Species 93 LAIDLAW, F. F., B.A., Assistant Lecturer and Demonstrator at Owens College, Manchester. On a Collection of Dragonflies made by Members of the Skeat Expedition in the Malay Peninsula in 1899-1900. (Plates V. & VI.) 63 LONNBERG, Dr. EINAR, C.M.Z.S., of the University, Upsala. On some remarkable Digestive Adaptations in Dipro-todont Marsupials 12 LORENZ, LUDWIG VON, C.M.Z.S., Imperial Museum of Natural History, Vienna. On the Specimen of the Quagga in the Imperial Museum of Natural History, Vienna on LYDEKKER, R., B.A., F.R.S., F.Z.S. Exhibition of, and remarks upon, a skull and two pair s of antlers of an Elk from Siberia i Q^ |