Illustrations ix 



PAGE 



DR. KARL VON ZITTEL .... . . . . 256 



SHELL OF Toxochelys baurif 257 



NIOBRARA GROUP, CRETACEOUS CHALK WITH CAP ROCK OF 

 LOUP FORK TERTIARY, KNOWN AS CASTLE ROCK, GOVE 



Co., KANSAS 262 



CHALK OF KANSAS, KNOWN AS THE COFFEE MILL. Hell 



Creek 262 



BONES OF Platecarpus coryphaeus 263 



SKELETON OF Hesperornis regalis, THE GIANT-TOOTHED 



BIRD OF THE KANSAS CRETACEOUS 266 



SLAB OF FOSSIL CRINOIDS, Unitacrinus socialis, CONTAIN- 

 ING 1 60 CALYCES, COVERING FOUR BY SEVEN FEET . . 267 



SKULL AND HORNS OF GIANT BISON FROM HOXIE, KANSAS. 

 SPREAD OF HORN CORES six FEET, ONE INCH; LENGTH 



ALONG CURVE, EIGHT FEET 268 



JAW OF COLUMBIAN MAMMOTH, Elephas columbi . . 269 

 THREE- HORNED DINOSAUR, Triceratops sp. Restoration 



by Osborn and Knight 270 



DUCK-BILLED DINOSAUR, Trachodon mirabilis. Restora- 

 tion by Osborn and Knight 271 



