XXVI ILLUSTRATIONS 



FIG. PAGE 



1 06. BONES OF FOSSIL ANCESTORS OF THE HORSE, . . . -357 



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, 359 



108. FOSSIL REMAINS OF A PRIMITIVE BIRD (ARCH^OPTERYX), . . 360 



109. GILL-CLEFTS OF A SHARK COMPARED WITH THOSE OF THE EM- 



BRYONIC CHICK AND RABBIT, .361 



1 10. JAWS OF AN EMBRYONIC WHALE, SHOWING RUDIMENTARY TEETH, 362 

 in. PROFILE RECONSTRUCTIONS OF THE SKULLS OF LIVING AND OF 



FOSSIL MEN, 365 



112. LAMARCK, 1744-1829, ......... 373 



113. CHARLES DARWIN, 1809-1882, 381 



114. AUGUST WEISMANN, BORN 1834, 400 



115. HUGO DE VRIES, ... 403 



116. BUFFON, 1707-1788, 412 



117. ERASMUS DARWIN, 1731-1802, 413 



118. GEOFFROY SAINT HILAIRE, 1772-1844, 416 



119. CHARLES DARWIN, 1809-1882, ....... 423 



120. ALFRED RUSSEL WALLACE, BORN 1823, ..... 428 



121. THOMAS HENRY HUXLEY, 1825-1895, 430 



122. ERNST HAECKEL, BORN 1834, .... . 432 



123. THE BIOLOGICAL STATION AT NAPLES, 445 



