ILLUSTRATIONS. 



PAGE 



Skeleton of Hylonomus Lyelli . . . .' . To face 257 



Footprints of Hylopus Logani ,, 261 



Humerus and Jaws of Dendrerpetou . . . . ,, 273 



Reptiliferous Tree . ...... . . . . ,, 277 



Microsaurian, restored . . . . . . - . ,, 279 



Dolichosoma longissimiim^ restored . . . . ,, 287 



Pupa and Conulus . . . . . - . . . , , 289 



Millipedes and Insect . . . ... . ,, 295 



Footprints of Limulus . . " . ' . . . . ,, 311 



Rusichnites Grenvillensis . . . ,, 323 



Restoration of Protospongia tetranema . '-. ... ,, 329 



Giant Net-sponge . . . . " . ' * . . . ' ,, 337 



Boulder Beach, Little Metis . .."..-, ,, 345 



Palaeography of North America . . . ... ,, 383 



Distribution of Animals in Time ..... ,, 401 



Tuckerman's Ravine and Mount Washington > . ,, 425 



Pre-historic Skulls , . ,, 459 



Primitive Sculpture ,, 481 



