27 Dorsal view of the skull of a Labyrinthodont (_Capitosaurus nasutus_) 176
28 Ventral view of the cranium, and lateral view of the cranium and mandible of _Siphonops annulatus_ 178
29 Visceral arches of Amphibia: A, _Molge cristata_; B, _Rana temporaria_, adult; C, Tadpole of _Rana_; D, _Siredon pisciformis_ 181
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