LIST OF ILLUSTRATIONS. 



PAG* 



IDEAL SECTIONS ILLUSTRATING THE GENESIS OF THE EARTH 8 



AMERICA IN THE LAURENTIAN PERIOD 18 



EOZOON CANADENSE . 24 



LIFE IN THE PRIMORDIAL AGE 40 



ORGANIC LIMESTONE OF TIIE SILURIAN . . . .63 



LIFE IN THE SILURIAN 66 



LIFE IN THE DEVONIAN .,.... 88 

 VEGETATION OF THE DEVONIAN ...*. 103 



CARBONIFEROUS PLANTS 126 



OLDEST LAND SNAILS 139 



CARBONIFEROUS EEPTILES 146 



FOLDINGS OF THE CRUST IN THE PERMIAN PERIOD . . 162 

 CURVES OF ELEVATION AND DEPRESSION . . . .179 

 CULMINATION OF TYPES OF PALEOZOIC ANIMALS . . . 183 



LAND ANIMALS OF THE MESOZOIC 194 



AQUATIC ANIMALS OF THE MESOZOIC 219 



FORAMINIFEUAL ROCK-BUILDERS 243 



MIOCENE MAMMAIS 253 



IN THE PoST-PLIOGENJS . . 301 



