LIST OF ILLUSTRATIONS
| FIG. | PAGE | |
| [47.] | Wings of Rhamphorhynchus | Frontispiece |
| [1.] | Lung of the lung-fish Ceratodus | [5] |
| [2.] | Attachment of the lower jaw in a Mammal and in a Pterodactyle | [12] |
| [3.] | Chaldæan Dragon | [15] |
| [4.] | Winged human figure from the Temple of Ephesus | [16] |
| [5.] | Flying fish Exocœtus | [18] |
| [6.] | Flying Frog | [19] |
| [7.] | Flying Lizard (Draco) | [20] |
| [8.] | Birds in flight | [22] |
| [9.] | Flying Squirrel (Pteromys) | [24] |
| [10.] | Bats, flying and walking | [25] |
| [11.] | Skeleton of Pterodactylus longirostris | [28] |
| [12.] | The skeleton restored | [29] |
| [13.] | The animal form restored | [30] |
| [14.] | Fore limbs in four types of mammals | [38] |
| [15.] | Pneumatic foramen in Pterodactyle bone | [46] |
| [16.] | Lungs of the bird Apteryx | [48] |
| [17.] | Air cells in the body of an Ostrich | [49] |
| [18.] | Lung of a Chameleon | [51] |
| [19.] | Brain in Pterodactyle, Mammal, Bird, and Reptiles | [53] |
| [20.] | Skull of Kingfisher and Rhamphorhynchus | [63] |
| [21.] | Skull of Heron and Rhamphorhynchus | [65] |
| [22.] | Palate of Macrocercus and ? Campylognathus | [71] |
| [23.] | Lower jaw of Echidna and Ornithostoma | [76] |
| [24.] | First two neck vertebræ of Ornithocheirus | [81] |
| [25.] | Middle neck vertebræ of Ornithocheirus | [83] |
| [26.] | Back vertebra of Ornithocheirus and Crocodile | [86] |
| [27.] | Sacrum, with hip bones, of Rhamphorhynchus | [88] |
| [28.] | Extremity of tail of Rhamphorhynchus phyllurus | [91] |
| [29.] | Hip-girdle bones in Apteryx and Rhamphorhynchus | [95] |
| [30.] | Pelvis with prepubic bone in Pterodactylus | [96] |
| [31.] | Pelvis with prepubic bones in Rhamphorhynchus | [97] |
| [32.] | Pelvis of an Alligator seen from below | [98] |
| [33.] | Femora: Echidna, Ornithocheirus, Ursus | [100] |
| [34.] | Tibia and fibula: Dimorphodon and Vulture | [102] |
| [35.] | Metatarsus and digits in three Pterodactyles | [104] |
| [36.] | Sternum in Cormorant and Rhamphorhynchus | [108] |
| [37.] | Sternum in Ornithocheirus | [109] |
| [38.] | Shoulder-girdle bones in a bird and three Pterodactyles | [113] |
| [39.] | The Notarium from the back of Ornithocheirus | [115] |
| [40.] | The shoulder-girdle of Ornithocheirus | [115] |
| [41.] | Humerus of Pigeon and Ornithocheirus | [119] |
| [42.] | Fore-arm of Golden Eagle and Dimorphodon | [120] |
| [43.] | Wrist bones of Ornithocheirus | [124] |
| [44.] | Clawed digits of the hand in two Pterodactyles | [125] |
| [45.] | Claw from the hand of Ornithocheirus | [129] |
| [46.] | The hand in Archæopteryx and the Ostrich | [130] |
| [48.] | Slab of Lias with bones of Dimorphodon | To face page [143] |
| [49.] | Dimorphodon (restored form) at rest | [144] |
| [50.] | Dimorphodon (restored form of the animal) | To face page [145] |
| [51.] | Dimorphodon skeleton, walking as a quadruped | To face page [146] |
| [52.] | Dimorphodon skeleton as a biped | To face page [147] |
| [53.] | Lower jaw of Dorygnathus | [149] |
| [54.] | Dimorphodon (wing membranes spread for flight) | To face page [150] |
| [55.] | Pelvis of Dimorphodon | [151] |
| [56.] | Rhamphorhynchus skeleton (restored) | [161] |
| [57.] | Scaphognathus (restoration of 1875) | [163] |
| [58.] | Six restorations of Ornithosaurs | [164] |
| [59.] | Ptenodracon skeleton (restored) | [167] |
| [60.] | Cycnorhamphus suevicus slab with bones | To face page [168] |
| [61.] | Cycnorhamphus suevicus (form of the animal) | To face page [169] |
| [62.] | Cycnorhamphus suevicus skeleton (restored) | [170] |
| [63.] | Cycnorhamphus Fraasi (restored skeleton form of the animal) | To face page [170] |
| [64.] | Cycnorhamphus Fraasi (restoration of the form of the body) | To face page [171] |
| [65.] | Neck vertebra of Doratorhynchus from the Purbeck | [173] |
| [66.] | Neck bone of Ornithodesmus from the Wealden | [173] |
| [67.] | Sternum of Ornithodesmus, seen from the front | [175] |
| [68.] | Sternum of Ornithodesmus, side view, showing the keel | [175] |
| [69.] | Diagram of known parts of skull of Ornithocheirus | [177] |
| [70.] | Neck bone of Ornithocheirus | [179] |
| [71.] | Jaws of Ornithocheirus from the Chalk | [180] |
| [72.] | Palate of the English Toothless Pterodactyle | [181] |
| [73.] | Two views of the skull of Ornithostoma (Pteranodon) | [182] |
| [74.] | Skeleton of Ornithostoma | [183] |
| [75.] | Comparison of six skulls of Ornithosaurs | [192] |
| [76.] | Pelvis of Ornithostoma | [195] |
| [77.] | Skull of Anchisaurus and Dimorphodon | [199] |
| [78.] | Skull of Ornithosuchus and Dimorphodon | [201] |
| [79.] | The pelvis in Ornithosaur and Dinosaur | [204] |
| [80.] | The prepubic bones in Dimorphodon and Iguanodon | [206] |
These figures are greatly reduced in size, and when two or more bones are shown in the same figure all are brought to the same size to facilitate the comparison.