Xll LIST OF ILLUSTRATIONS. 



TIG. PAGE 



33. Middle teeth of Cestracion compared with homologous dental 



plates of the Carboniferous Cochliodontidoe ... 43 



34. Hybodus hauffianus. Skeleton ...... 45 



35. delabechei. Outline of distorted head ... 45 



36. Synechodus dubrisiensis. Dentition ..... 47 



37. Asteracanthus (Strophodus medius). Dentition . 48 



38. Oxyrhina crassa. Tooth 49 



39. Squatina speciosa. Nearly complete fish .... 50 



40. Sclerorhynchus atavus. Restoration . . . . .51 



41. Ptychodus polygyrus. Tooth 4. . . 52 



42. decurrens. Diagram of arrangement of teeth . . 53 



43. Cyclobatis oligodactylus. Pelvic arch and fins ... 53 



44. Squaloraja polyspondyla. Restoration of male ... 56 



45. Myriacanthus granulatus. Outline of head .... 58 



46. Diagram of Left Palatine Tooth in the principal genera of the 



Chimseridse 59 



47. Diagram of Right Mandibular Tooth in the principal genera 



of the Chimseridae .60 



48. Dipterus valenciennesi. Roof of skull . . . . .61 



49. ,, Restoration . . . . .62 



50. Coccosteus decipiens. Restoration of cranial and dorsal shields 65 



51. Restoration of ventral shield . . 66 



52. Restoration 67 



53. Homosteus milleri. Cranial and dorsal shield .... 68 



54. Transverse section of Holoptychiaii (Dendrodont) Tooth . 70 



55. Holoptychius flemingi. Outline restoration .... 72 



56. Rhizodus hibb&rti. Left mandibular ramus, right clavicle, and 



right infraclavicle 73 



57. Rhizodopsis sauroides. Outline restoration of head and opercular 



apparatus 75 



58. Eusthenopteron foordi. Restoration 77 



59. Osteolepis microlepidotus. Outline of cranial roof ... 77 



60. Undina gulo. Restoration ....... 80 



61. Palceoniscus macropomus. Restored head and pectoral arch . 83 



62. Cheirolepis trailli. Restoration 85 



63. Palceoniscus macropomus. Restoration 86 



64. Platysomus gibbosus. Restoration . . . . . .87 



65. Belonorhynchus gigas. Restoration 89 



66. Chondrosteus acipenseroides. Portion of cranial roof . . 91 



67. Restoration of head and pectoral arch 92 



68. Restoration . . . .93 



69. Lepidotus minor. Restoration 97 



70. Dapedius politus. Restoration 99 



71. Aetheolepis mirabilis. Series of scales ..... 100 



