CONTENTS AND CONTRIBUTORS 



PAGE 



CAN WE SEE EVOLUTION OCCURRING? .... 24 



Herbert Spencer Jennings, B.S., A.M., S.D., 

 Ph.D., LL.D. 



Professor of Zoology and Director of the Zoological Lab- 

 oratory of The Johns Hopkins University. 



President American Zoological Society, 1908-09. 



Member National Academy of Sciences. 



Hon. Fellow Royal Microscopical Society of Great Britain. 



Fellow American Association for the Advancement of 

 Science. 



VESTIGIAL ORGANS 34 



George Howard Parker, S.D., S.B. 



Professor of Zoology and Director of the Zoological Labo- 

 ratory, Harvard University. 



Foreign Member Linnaean Society, London. 



Member National Academy of Sciences. 



Fellow American Association for the Advancement of 

 Science. 



EVOLUTION AS SHOWN BY THE ADVANCEMENT 



OF THE INDIVIDUAL ORGANISM 49 



Ernest William MacBride, F.R.S., M.A., D.Sc, 

 LL.D., F.Z.S., F.L.S. 



Professor of Zoology, Imperial College of Science and 



Technology, London. 

 Vice-President Zoological Society, London. 

 Member American Society of Zoologists. 



EMBRYOLOGY AND EVOLUTION 62 



Edwin Grant Conklin, S.B., A.B., A.M., Ph.D., 



Sc.D., LL.D. 



Professor of Biology, Princeton University. 

 Member National Academy of Sciences. 

 Member American Society of Zoologists. 

 Foreign Member Societe Royale de Sci., Med. et Naturelle 

 de Bruxelles. 



THE GEOGRAPHICAL DISTRIBUTION OF ANIMALS 81 

 William Berryman Scott, A.B., Ph.D. (Heidel- 

 berg), LL.D., Sc.D. (Harvard and Oxford). 



Blair Professor of Geology and Palaeontology, Princeton 



University. 

 Wollaston Medal, Geological Society, London. 

 Member National Academy of Sciences. 

 Member American Philosophical Society (Pres., 1918-25). 

 Member Geological Society of America (Past Pres.) 



[xvi] 



