ILLUSTRATIONS 



FIG. PAGE 



72. THE EARLIEST KNOWN PICTURE OF CELLS, FROM HOOKE'S Micro- 



graphia (1665), ..... ... 238 



73. SKETCH FROM MALPIGHI'S TREATISE ON THE ANATOMY OF PLANTS 



(1670), . 239 



74. THEODOR SCHWANN, 1810-1882, 245 



75. M. SCHLEIDEN, 1804-1881, 246 



76. THE EGG AND EARLY STAGES IN ITS DEVELOPMENT (AFTER GE- 



GENBAUR), 253 



77. AN EARLY STAGE IN THE DEVELOPMENT OF THE EGG OF A ROCK 



LIMPET (AFTER CONKLIN), . . . . . -254 



78. HIGHLY MAGNIFIED TISSUE-CELLS FROM THE SKIN OF A SALA- 



MANDER (AFTER WILSON), 255 



79. DIAGRAM OF THE CHIEF STEPS IN CELL-DIVISION (AFTER PARKER), 256 



50. DIAGRAM OF A CELL (MODIFIED AFTER WILSON), . . .257 



51. (.4) ROTATION OF PROTOPLASM IN CELLS OF NITELLA. () HIGH- 



LY MAGNIFIED CELLS OF A TRADESCANTIA PLANT, SHOWING 



CIRCULATION OF PROTOPLASM (AFTER SEDGWICK AND WILSON), 261 



82. FELIX DUJARDIN, 1801-1860, ....... 265 



83. PURKINJE, 1787-1869, .... ... 267 



84. CARL NAGELI, 1817-1891, 268 



85. HUGO VON MOHL, 1805-1872, 269 



86. FERDINAND COHN, 1828-1898, .271 



87. HEINRICH ANTON DE BARY, 1831-1888, 272 



88. MAX SCHULTZE, 1825-1874, 273 



89. FRANCESCO REDI, 1626-1697, . ... 280 



90. LAZZARO SPALLANZANI, 1729-1799, . . . 283 



91. APPARATUS OF TYNDALL FOR EXPERIMENTING ON SPONTANEOUS 



GENERATION, . . . 290 



92. Louis PASTEUR (1822-1895) AND His GRANDDAUGHTER, . . 295 



93. ROBERT KOCH, BORN 1843, . . . 301 



94. SIR JOSEPH LISTER, BORN 1827, . . ... 302 



95. GREGOR MENDEL, 1822-1884, 315 



96. FRANCIS GALTON, BORN 1822, 317 



97. CHARLES LYELL, 1797-1875, . 331 



98. PROFESSOR OWEN AND THE EXTINCT FOSSIL BIRD OF NEW ZEA- 



LAND, . 333 



99. Louis AGASSIZ, 1807-1873, ... ... 334 



100. E. D. COPE, 1840-1897, ........ 336 



101. O. C. MARSH, 1831-1899, 337 



102. KARL VON ZITTEL, 1839-1904, ....... 339 



103. TRANSMUTATIONS OF PALUDINA (AFTER XEUMAYER\ . . 352 



104. PLANORBIS SHELLS FROM STEINHEIM (AFTER HYATT), . . -353 



105. BONES OF THE FORELEG OF A HORSE, 356 



