ILLUSTRATIONS. 



Skeleton of Hylonoinus Lydli 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 tetranenia .... ,, 329 



Giant Net-sponge , . . ,, 33$ 



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



Palaeogeography of North America .... ,,3^3 



Distribution of Animals in Time .,401 



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



Pre-historic Skulls 459 



Primitive Sculpture ... ... ,, 481 



