276 COPE. [Vou. III. 
Fic. 18. Phenacodus primevus, anterior foot; original. Coryphodon sp., anterior 
foot; original. AWyracotherium venticolum, anterior foot; original. 
Fic. 19. Smlodon neogeus, skeleton from Buenos Ayres; from Burmeister. 
Fic. 20. Hyena striata ; from the Standard Natural History. 
Fic. 21. Phenacodus primevus, carpus and tarsus; original. 
Fic. 22. Hyracotherium venticolum, posterior foot; original. 
Fic. 23. Cervus canadensis, from behind, trotting; from Maybridge. 
Fic. 24. Anterior extremity of a bat; from Huxley and Hawkins. 
FIG. 25. Bradypus tridactylus, posterior foot; from Cuvier. 
Fic. 26. Cholepus hoffmanii, three positions in locomotion; from Allen. 
Fic. 27. Coryphodon elephantopus, posterior foot; original. 
Fic. 28. Aphelops megalodus, posterior foot; original. 
Fic. 29. Amblyctonus sinosus, distal end of tibia; original. 
Fic. 30. Oxyena morsitans, distal end of tibia; original. 
Fic. 31. Archelurus debilis, distal end of tibia; original. 
Fic. 32. Mimravus gomphodus, femur; original. 
Fic. 33. Poébrotherium labiatum, hind foot; original. 
Fic. 34. Protohippus sejunctus, hind foot; original. 
Fic. 35. Cosoryx furcatus, posterior cannon bone; original. 
Fic. 36. Procamelus occidentalis, anterior foot; original. 
Fic. 37. Cosoryx furcatus, posterior cannon bone; original. 
Fic. 38. Poébrotherium labiatum, anterior foot, part; original. 
Fic. 39. Manis indica, fore foot; from Cuvier. 
Fic. 40. Priodontes maximus, fore foot; from Cuvier. 
Fic. 41. Priodontes maximus, hind foot; original. 
Fic. 42. Cervus elaphus, humero-radial, and metacarpo-phalangeal articulations; 
original, 
FIG. 43. 1, 2, Cosoryx necatus ; 1 without, and 2 with, burr on antler. 3, 4, Coso- 
ryx ramosus ; 3, antler broken and reunited, 4, beam with burr; original. 
Fic. 44. Cynocephalus, cervical vertebra, three views; original. 
Fic. 45. Diagrams representing different types of locomotion, showing motion of 
vertebral column in each. 
Fic. 46. Cervus canadensis in motion, from behind; showing position of legs in 
trot; from Muybridge. 
Fic. 47. Mimravus gomphodus, skull; original. 
Fic. 48. Lsthonyx burmeistert, dentition; original. 
Fic. 49. Psittacotherium multifragum, lower jaw; original. 
Fic. 50. Lemur collaris, dentition; original. 
Fic. 51. Zriconodon ferox, inferior dentition; from Marsh. 
Fic. 52. MJenacodon rarus, inferior dentition; from Marsh, 
Fic. 53. Diagrams representing: A, relations of superior and inferior molars of 
Triconodon; B, of an intermediate type; C, ditto of Spalacotherium; original. 
Fic. 54. Deltatherium fundaminis, cranium and dentition; original. 
Fic. 55. Aesozoic Mammalia, molar teeth; from Osborn. 
Fic. 56. Centetes ecaudatus, dentition; original. 
Fic. 57. Lemur collaris, profile of closed dentition; original. 
Fic. 58. Stypolophus whitia, profile of closed dentition; superior molars superposed 
on inferiors, the latter in black, the former in double white outlines; original. 
Fic. 59. Cynodictis geismarianus, skull one-half natural size; original. 
Fic. 60. Aelurodon sevus, superior and inferior molars in relation, diagram; _origi- 
nal, 
