140 ILLUSTRATIONS. 



Page. 



Plate XLV. Stegosaurus ungulatus Marsh. Jurassic 334 



XLVI. Stegosaurus ungulatus. Jurassic 336 



XLVII. Stegosaurus ungulatus. Jurassic 338 



XLVIII. Stegosaurus. Jurassic 340 



XLIX. Stegosaurus ungulatus. Jurassic 342 



L. Stegosaurus. Jurassic 344 



LI. Diracodon laticeps Marsh. Jurassic 346 



LII. Restoration of Stegosaurus ungulatus Marsh 348 



LIII. Camptosaurus medius Marsh. Jurassic 350 



LI V. Camptosaurus dispar Marsh. Jurassic 352 



LV. Camptosaurus, Dryosaurus, and Laosaurus. Jurassic 354 



LVI. Restoration of Camptosaurus dispar Marsh 356 



LVII. Restoration of Laosaurus consors Marsh 358 



LVIII. Ornithomimus velox Marsh. Cretaceous 360 



LIX. Triceratops prorsus Marsh. Cretaceous 362 



LX. Sterrholophus and Triceratops. Cretaceous 364 



LXI. Triceratops. Cretaceous 366 



LXII. Torosaurus. Cretaceous 368 



LXIII. Ceratops, Sterrholophus, and Torosaurus. Cretaceous 370 



LXIV. Triceratops prorsus. Cretaceous 372 



LX V. Triceratops prorsus. Cretaceous 374 



LXVI. Triceratops prorsus. Cretaceous 376 



LXVII. Sterrholophus and Triceratops. Cretaceous 378 



LXVIII. Triceratops prorsus. Cretaceous 380 



LXIX. Sterrholophus and Triceratops. Cretaceous 382 



LXX. Triceratops. Cretaceous 384 



LXXI. Restoration of Triceratops prorsus Marsh 386 



LXXII. Claosaurus annectens Marsh. Cretaceous 388 



LXX1II. Claosaurus annectens. Cretaceous 390 



LXXIV. Restoration of Claosaurus annectens Marsh 392 



LXXV. Claosaurus, Trachodon, Nodosaurus, Pala-osciucus. Cretaceous.. 394 



LXXVI. Skulls of dinosaurs; showing size of brain 396 



LXXVII. Brain casts of dinosaurs 398 



LXXVIII. Teeth of predentate dinosaurs 400 



LXXIX. Pubes of predentate dinosaurs 402 



LXXX. Ischia of predentate dinosaurs 404 



LXXXI. Pelves of predentate dinosaurs 406 



LXXXII. Restoration of Compsognathus longipes Wagner 408 



LXXXIII. Restoration of Scelidosaurus Harrisonii Oweu 410 



LXXXIV. Restoration of Hypsilophodon Foxii Huxley 412 



LXXXV. Restoration of Iguanodon Bernissarteusis Boulenger 414 



Fig. 1. Geological horizons of vertebrate fossils in North America 145 



2. Slab of Connecticut River sandstone; showing footprints of two 



dinosaurs on a surface marked by raindrop impressions 146 



3. Left leg and foot of Hallupus victor Marsh 154 



4. United metatarsal bones of Ceratosaurus nasicornis Marsh 162 



5. United metatarsal bones of great Penguin (Apteuodytes Pennantii). 162 



6. Tooth of Astrodon Johnstoni Leidy 164 



7. Cervical rib of Apatosaurus ajax Marsh; outer view 167 



8. The same rib ; inner view 167 



9. Proximal end of rib of Brontosaurus excelsus Marsh; front view 170 



10. The same bone; back view 170 



11. The same; superior view 170 



12. Sternal ribs of Brontosaurus excelsus; outer view 171 



13. The same specimen ; inner view 171 



