Till LIST OF ILLUSTRATIONS. 



PAGE 



39. Restoration of Shield of Pteraspis, upper aspect (after Lankester), Old 



Eed Sandstone, Herefordshire . . . . . . .18 



40. Cephalaspis Lyelli (restored), side view (after Lankester), 0. E. S., Forfar 18 



41. Cephalaspis Lyelli (dorsal aspect), 0. E. S., Glamrais, Forfarshire . 19 



42. The Australian Mudfish, Ceratodus Forsteri (recent), Australia . . 19 



43. Dipterus macrolepidotus, Old Eed Sandstone, Scotland . . .19 



44. Mouth of Ceratodus Forsteri (recent) . . . . . .20 



45. Jaws of Dipnoan Fishes ........ 20 



46. Eestoration of Phaneropleuron (after Traquair), 0. E. S., Scotland . 21 



47. Polypterus bichir, living in the Nile, Gambia, etc. . . . .21 



48. The African Mudfish, Protopterus annectens, living in the rivers of Africa 21 



49. Holoptychius (restored after Huxley), Old Eed Sandstone, Fifeshire . 22 



50. Gyroptychius (restored after Pander), Old Eed Sandstone, Scotland . 23 



51. Osteolepis (restored after Pander), Old Red Sandstone, Scotland . . 23 



52. Glyptolcemus Kinnairdii (restored after Huxley), 0. R. S., Scotland . 23 



53. Tooth of Strepsodus ......... 22 



54. TJndina Kohleri, Lias (restored outline after Huxley) . . .24 



55. Macropoma Mantelli, Chalk, Lewes (restored outline after Huxley) • 24 



56. Skeleton of Sturgeon (Acipenser) recent . . . . .25 



57. Ganoid scales of Amblypterus striatus, Carboniferous • . .26 



58. Platysomus striatus (restoration after Dr. E. H. Traquair), Magnesian 



Limestone, Durham . . . . . . . .27 



59. Furynotus crenatus, ' Cement-stones,' Lower Carboniferous Series of 



Scotland (after Traquair) ........ 27 



60. Cheirodus granulosus (restored after Traquair), Coal-measures . . 28 



61. Palaoniscus macropom us, Ag. (restored by Traquair), Kupferschiefer . 28 



62. Eestoration of Head of Chondrosteus acipeuseroides (after Traquair) 



Lower Lias, Lyme Eegis ....... 29 



63. Lepidotus maximus, Lithographic Stone (Upper Oolite), Bavaria . . 29 



64. Bapedms pholidotus, Lower Lias, Lyme Eegis, Dorset . . .29 



65. Portions of Pvcnodonts ........ 30 



*1 



66. Upper dentition of Ccelodus ellipticus, Gault, Folkestone . . .30 



67. Stemmalodus rhombus, Oolite, Italy ...... 31 



68. Caturus furcatus, Lithographic Stone (Upper Oolite), Bavaria . . 31 



69. Leptolepis sprattiformis, Lithographic Stone, Solenhofen . . .31 



70. Skeleton of the Common Perch. {Perca fiuviatilis) . . . .32 



71. Scales of Teleostean Fishes ........ 33 



72. Capelin {Mallotus villosus) in a nodule of Glacial Clay, Greenland . 33 



73. Clupea brevissima (after Pictet and Humbert), Upper Cretaceous, Mount 



Lebanon .......... 34 



74. Rhinellus furcatus (after Pictet & Humbert), Up. Cret., Mt. Lebanon . 35 



75. Eurypholis Boissieri (after Tictet & Humbert), Up. Cret.,Mt. Lebanon 35 



76. Pharyngeal dentition of Phyllodus petiolatus, London Clay, Sbeppey 38 



77. Platax minor (after Pictet & Humbert), Up. Cret., Mt. Lebanon . 40 



78. Semiophorus velicans, Agassiz, from the Eocene of Monte Bolca . 42 



79. Sparnodus ovalis, Upper Eocene, Monte Bolca . . . .44 



80. Smerdis minutus, Eocene, Aix in Provence, France . . . .44 



81. Teeth of Biodon scillce, Miocene, Malta . . . . . .45 



