XXVI 



ILLUSTRATIONS 



FIG. PAGE 



105. Bones of the Foreleg of a Horse, ..... 358 



106. Bones of Fossil Ancestors of the Horse, . . . 359 



107. Representation of the Ancestor of the Horse Drawn by 



Charles R. Knight under the Direction of Professor 

 Osborn. Permission of the American Museum of Natural 

 History, .......... 361 



108. Fossil Remains of a Primitive Bird (Arch^eopteryx), . 362 



109. Gill-clefts of a Shark Compared with those of the Em- 



bryonic Chick and Rabbit, ...... 363 



no. Jaws of an Embryonic Whale, showing Rudimentary Teeth, 364 

 in. Profile Reconstructions of the Skulls of Living and of 



Fossil Men, 



112. Lamarck, 1 744-1829, 



113. Charles Darwin, 1809-1882, 



114. August Weismann, 1834-1914, 



115. Hugo de Vries, . 



116. Buffon, 1707-1788, 



117. Erasmus Darwin, 1 731-1802, 

 108. Geoffroy Saint Hilaire, 1772-1844, 

 no. Charles Darwin, 1809-1882, 



120. Alfred Russel Wallace, 1823-1913, 



121. Thomas Henry Huxley, 1825-1895, 



122. Ernst Haeckel, born 1834, 



123. The Biological Station at Naples, 



37i 

 379 

 3&7 

 406 

 409 

 420 

 421 

 424 



43i 

 436 

 438 

 440 



453 



