Contents 



PAGE 



X. The Influence of Darwin on the Study ^ of 

 Animal Embryology: 

 A. Sedgwick, Professor of Zoology and Compara- 

 tive Anatomy in the University of Cambridge 171 



XL The Palaeontological Record. I. Animals : 

 W. B. Scott, Professor of Geology in the Uni- 

 versity of Princeton 185 



XII. The Palaeontological Record. II. Plants: 



D. H. Scott, President of the Linnean Society of 



London 200 



XIII. The Influence of Environment on the Forms 



of Plants : 

 Georg Klebs, Professor of Botany in the Uni- 

 versity of Heidelberg 223 



XIV. Experimental Study of the Influence of 



Environment on Animals : 

 Jacques Loeb, Professor of Physiology in the 



University of California .... 247 



XV. The Value of Colour in the Struggle for Life : 



E. B. Poulton, Hope Professor of Zoology in 



the University of Oxford . . . .271 



XVI. Geographical Distribution of Plants : 



Sir William Thiselton-Dyer . . 298 



XVII. Geographical Distribution of Animals : 



Hans Gadow, Strickland Curator and Lecturer 



on Zoology in the University of Cambridge. 319 



XVIII. Darwin and Geology : 



J. W. Judd 337 



XIX. Darwin's work on the Movements of Plants : 



Francis Darwin 385 



XX. The Biology of Flowers : 



K. Goebel, Professor of Botany in the Uni- 

 versity of Munich 401 



XXI. Mental Factors in Evolution : 



C. Lloyd Morgan, Professor of Psychology at 



University College, Bristol . . . .424 



