LIST OF ILLUSTRATIONS. 



PAGB 



Ideal Sections Illustrating the Genesis or the Earth 8 



America in the Laurentian Period 18 



EozooN Canadense ...,.,., 24 

 Life in the Primordial Age . . .... .40 



Organic Limestone or the 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 . . . 188 



Land Animals of the Mesozoic 194 



Aquatic Animals of the Mesozoic 219 



Foraminiferal Kock-builders 243 



Miocene Mammals 253 



Britain in the Post-pliocen* 301 



