LIST OF ILLUSTRATIONS. Page Cape Trinity on the Saguenay _Frontispiece_ Folding of the Earth's Crust _To face_ 9 Cambro-Silurian Sponges " 39 Map of the North Atlantic " 57 Nature-print of Eozoon " 95 Laurentian Hills, Lower St. Lawrence 100 Section from Petite Nation Seigniory to St. Jerome 101 The Laurentian Nucleus of the American Continent 103 Attitude of Limestone at St. Pierre 109 Weathered Eozoon and Canals _To face_ 112 " " " 113 Group of Canals in Eozoon 115 Amœba and Actinophrys 119 Minute Foraminiferal Forms 123 Section of a Nummulite 127 Portion of Shell of Calcarina 128 Weathered Eozoon with Oscular tubes _To face_ 135 Diagram showing different States of Fossilization of a Cell of a Tabulate Coral 139 Slice of Crystalline Lower Silurian Limestone 141 Walls of Eozoon penetrated with Canals 141 Joint of a Crinoid 145 Shell from a Silurian Limestone, Wales 146 Casts of Canals of Eozoon in Serpentine 147 Canals of Eozoon 147 Primordial Trilobites _To face_ 169 Primitive Fishes " 184 Devonian Forest " 201 Coal Section in Nova Scotia 233 Skeleton of _Hylonomus Lyelli_ _To face_ 257 Footprints of _Hylopus Logani_ " 260 Humerus and Jaws of _Dendrerpeton_ " 272 Reptiliferous Tree " 276 Microsaurian, restored " 278 _Dolichosoma longissimum_, restored " 286 _Pupa_ and _Conulus_ " 288 Millipedes and Insect " 296 Footprints of _Limulus_ " 311 _Rusichnites Grenvillensis_ " 322 Restoration of _Protospongia tetranema_ " 329 Giant Net-sponge " 336 Boulder Beach, Little Metis " 345 Palæogeography of North America " 383 Distribution of Animals in Time " 401 Tuckerman's Ravine and Mount Washington " 425