X LIST OF ILLUSTRATIONS. 



Page. 



8. Left lachrymal of Antrodemus valens Leidy, external and internal views 17 



9. Left nasal of Antrodemus valens Leidy, lateral and ventral views 18 



10. Right premaxillary of Antrodemus valens Leidy, lateral and internal views 19 



11. Right premaxillary of Antrodemus, species ? anterior, lateral and internal views 20 



12. Left maxillary of Antrodemus valens Leidy, internal view 21 



13. Right jugal, quadratojugal, and quadrate of Antrodem-us ralens Leidy, internal view 23 



14. Right ectopterygoid of Aiitrodemus valens Leidy, superior view 24 



15. Posterior end of right ramus of Antrodemus valens Leidy, lateral, internal, and superior views. 27 



16. Brain case of Antrodemus valens Leidy, oblique side view 29 



17. Atlas and axis of Antrodemus valens Leidy, lateral, anterior, and ventral views 33 



18. Articulated cervical vertebrae of Antrodemus valens Leidy, lateral view 34 



19. Fourth cervical vertebra of Antrodemus valens Leidy, anterior view 35 



20. Ninth cervical vertebra of Antrodevivs valens Leidy, anterior view 36 



21. Map of "Quarry C " 38 



22. Third dorsal vertebra of Antrodemus valens Leidy, lateral view 39 



23. Fourth dorsal vertebra of Antrodemus valens Leidy, lateral and anterior views 40 



24. Sixth dorsal vertebra of Antrodemus valens Leidy, lateral view 40 



25. Ninth dorsal vertebra of Antrodemus valens Leidy, lateral and anterior views 41 



26. Tenth dorsal vertebra of Antrodemus valens Leidy, lateral view 42 



27. Fourteenth dorsal vertebra of Antrodemus valens Leidy, lateral and anterior views 44 



28. Sixth.caudal vertebra of Antrodemus valens Leidy, lateral view 46 



29. Median caudal vertebra of Antrodemus valens Leidy, lateral view 47 



30. Caudal vertebra from distal part of the tail of Antrodemus valens Leidy, lateral view 47 



31. Series of five distal caudal vertebrae of Antrodemus valens Leidy, lateral view 48 



32. Anterior chevron of Antrodemus valens Leidy, lateral and posterior views 49 



33. Right cervical rib of third cervical vertebra of Antrodemus valens Leidy, two internal views. 49 



34. Right cervical rib of eigth cer%'ical vertebra of Antrodemus valens Leidy, internal view 50 



35. First thoracic rib of Antrodemus valens Leidy, internal view ,. 51 



36. Right thoracic ribs of Antrodemus valens Leidy anterior view 52 



37. Double abdominal rib of Antrodemus valens Leidy, ventral views 53 



38. Segmejits of aljdominql ribs of Antrodemus valens Leidy 54 



39. Transverse section of abdominal basket of Antrodemus valens Leidy 55 



40. Right fore limb and foot of Antrodemus valens Leidy, lateral view 57 



41. Right humerus of Antrodemus valens Leidy, anterior and posterior views 59 



42. Left ulna of Antrodemus valens Leidy, posterior view 60 



43. Right radius of Antrodemus valens Leidy, internal view til 



44. Carpal bones of right foot of Antrodemus valens Leidy, distal view 61 



45. Digits of right fore foot of Antrodemus valens Leidy, lateral \'iew 62 



46. Pelvis of Antrodemus valens Leidy lateral view 65 



47. Right pubis of Antrodemus valens Leidy, lateral and distal views 67 



48. Left tibia, fibula, astragalus, and calcaneum of Antrodemus valens Leidy, anterior, lateral and 



posterior views 70 



49. Left tibia, fibula, astragalus, and calcaneum oi Antrodemus valensLeidy, proximal and distal 



views : 71 



50. Left astragalus of Antrodemus valens Leidy, anterior, dorsal and lateral views 72 



51. Articulated metatarsals of Antrodemus valens Leidy, proximal view 74 



52. Left hind foot of Antrodemus valens Leidy, oblique lateral view 75 



53. Skull of Ceratosaurus nasicornis Marsh, lateral view 80 



54. Skull of Ceratosaurus nasicornis Marsh, lateral view 86 



55. Left ramus Ceratosaurus nasicornis Marsh, internal view 89 



56. Third dorsal vertebra of Ceratosaurus nasicornis Marsh, lateral view 96 



57. Fifth caudal vertebra with chevron of Ceratosaurus nasicornis Marsh, lateral view 99 



58. Left fore limb and foot of Ceratosaurus nasicornis Marsh, lateral view 101 



59. Left ulna of Ceratosaurus nasicornis Marsh, posterior view 103 



