CONTENTS AND CONTRIBUTORS 



PAGE 



THE RECORD OF THE ROCKS 102 



Francis Arthur Bather, F.R.S., MA., D.Sc, F.G.S. 



President Geological Society of London. 



Keeper Department of Geology, British Museum (Natural 



History). 

 Rolleston Prize of Universities of Oxford and Cambridge 



for Research in Biology. 



THE NATURE OF SPECIES 112 



John Walter Gregory, F.R.S., D.Sc, F.G.S., 

 M.I.M.M. 



Professor of Geology, University of Glasgow. 

 Victoria Medal Royal Geographical Society. 

 Gold Medal Royal Society, Edinburgh. 

 Bigsby Medal Geological Society, London. 

 Gallois Medal, Societe Geographique de Paris. 



THE PROGRESSION OF LIFE ON EARTH .... 124 

 Sir Arthur Smith Woodward, F.R.S., LL.D. 



Past President of the Linnaean and Geological Societies of 



London. 

 Keeper of Geological Department, British Museum, 1901-24. 

 Vice-President of the Zoological Society, London. 

 Royal Medal, Royal Society. 

 Lyell Medal and Wollaston Medal, Geological Society, 



London. 



THE EVOLUTION OF PLANTS 137 



C. Stuart Gager, Pd.B., Sc.D., Pd.D., Ph.D. 



Director Brooklyn Botanic Garden. 

 Member New York Academy of Sciences. 

 Member Botanical Society of America. 

 Fellow American Association for the Advancement of 

 Science. 



THE STORY TOLD BY FOSSIL PLANTS . . . . 156 

 Edward Wilder Berry. 



Professor of Palaeontology, The Johns Hopkins University. 

 Member National Academy of Sciences. 

 President Palaeontological Society of America, 1924. 

 Member New York Academy of Sciences. 

 Fellow Geological Society of America. 

 "Walker Prize, Boston Society of Natural History. 

 Geologist, United States Geological Survey. 



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