30 Shoulder-girdle and sternum of an adult male Common Frog (_Rana temporaria_), and of an adult female _Docidophryne gigantea_ 183 31 A, Right antibrachium and manus of a larval Salamander (_Salamandra maculosa_); B, Right tarsus and adjoining bones of _Molge sp._ 186 32 Lateral and dorsal views of the skull of an _Ichthyosaurus_ 196 33 Lateral view and longitudinal section of the skull of a Lizard (_Varanus varius_) 201 34 Lateral view of the shoulder-girdle of a Lizard (_Varanus_) 202 35 Restored skeleton of _Ceratosaurus nasicornis_ 206 36 Dorsal and ventral views of the carapace of a Loggerhead Turtle (_Thalassochelys caretta_) 216 37 Plastron of a Green Turtle (_Chelone midas_) 218 38 The skull of a Green Turtle (_Chelone midas_) 223 39 Longitudinal vertical section through the cranium of a Green Turtle (_Chelone midas_) 226 40 Anterior limb of a young Hawksbill Turtle (_Chelone imbricata_), and posterior limb of a large Green Turtle (_Chelone midas_) 234 41 The first four cervical vertebrae of a Crocodile (_Crocodilus vulgaris_) 239 42 Anterior view of a late thoracic and the first sacral vertebrae of a Crocodile (_Crocodilus palustris_) 242 43 Palatal aspect of the cranium and mandible of an Alligator (_Caiman latirostris_) 245 44 Lateral view of the skull of an Alligator (_Caiman latirostris_) 248 45 Longitudinal section through the skull of an Alligator (_Caiman latirostris_) 253 46 Sternum and associated membrane bones of a Crocodile (_Crocodilus palustris_) 261 47 Left half of the pectoral girdle of an Alligator (_Caiman latirostris_) 262 48 Right anterior and posterior limbs of an Alligator (_Caiman latirostris_) 264 49 Pelvis and sacrum of an Alligator (_Caiman latirostris_) 267 50 Preparation of part of the right mandibular ramus of _Crocodilus palustris_ 274 51 Dorsal and ventral views of the skull of a Common Snake (_Tropidonotus natrix_) 279 52 Skull of Hatteria (_Sphenodon punctatus_) 282 53 Hyoids of an Alligator (_Caiman latirostris_), and of a Green Turtle (_Chelone midas_) 285