46. THE ORGANS OF SPEECH AND THEIR APPLICATION IN THE FORMATION OF ARTICULATE SOUNDS. By G. H. von Meyer, Professor in Ordinary of Anatomy at the University of Zurich. With 47 Woodcuts. $1.75. 47. FALLACIES: A View of Logic from the Practical Side. By Alfred Sidgwick, B.A., Oxon. $1.75. 48. ORIGIN OF CULTIVATED PLANTS. By Alphonse de Candolle. $2.00. 49. JELLY-FISH, STAR-FISH, AND SEA-URCHINS. Being a Research on Primitive Nervous Systems. By George J. Romanes. $1.75. 50. THE COMMON SENSE OF THE EXACT SCIENCES. By the late William Kingdon Clifford. $1.50. 51. PHYSICAL EXPRESSION: Its Modes and Principles. By Francis Warner, M.D., Assistant Physician, and Lecturer on Botany to the London Hospital, etc. With 51 Illustrations. $1.75. 52. ANTHROPOID APES. By Robert Hartmann, Professor in the University of Berlin. With 63 Illustrations. $1.75. 53. THE MAMMALIA IN THEIR RELATION TO PRIMEVAL TIMES. By Oscar Schmidt. $1.50. 54. COMPARATIVE LITERATURE. By Hutcheson Macaulay Posnett, M. A., LL. D., F. L. S., Barrister-at-Law; Professor of Classics and English Literature, University College, Auckland, New Zealand; author of "The Historical Method," etc. $1.75. 55. EARTHQUAKES AND OTHER EARTH MOVEMENTS. By John Milne, Professor of Mining and Geology in the Imperial College of Engineering, Tokio, Japan. With 38 Figures. $1.75. 56. MICROBES, FERMENTS, AND MOULDS. By E. L. Trouessart. With 107 Illustrations. $1.50. 57. THE GEOGRAPHICAL AND GEOLOGICAL DISTRIBUTION OF ANIMALS. By Angelo Heilprin. $2.00. 58. WEATHER. A Popular Exposition of the Nature of Weather Changes from Day to Day. By Hon. Ralph Abercromby. $1.75. 59. ANIMAL MAGNETISM. By Alfred Binet and Charles Féré, Assistant Physician at the Salpêtrière. * * * * * [Illustration: DIAGRAM OF THE HISTORY OF PLANTS IN GEOLOGICAL TIME. (Adapted from Ward.)] THE INTERNATIONAL SCIENTIFIC SERIES THE GEOLOGICAL HISTORY OF PLANTS BY SIR J. WILLIAM DAWSON C. M. G., LL. D., F. R. S., &c. _WITH ILLUSTRATIONS_ NEW YORK APPLETON AND COMPANY 1888 Copyright, 1888, By D. APPLETON AND COMPANY. PREFACE. The object of this work is to give, in a connected form, a summary of the development of the vegetable kingdom in geological time.