Family =Proterosauridae=. _Proterosaurus._ Order 6. SQUAMATA. Suborder (1). LACERTILIA. Group =Lacertilia vera=. Family =Geckonidae=. Gecko. Family =Pygopodidae=. Lialis--scale-foot. Family =Agamidae=. Draco--flying lizard. Agama. Family =Iguanidae=. Iguana. Family =Anguidae=. Ophisaurus (Bipes, Pseudopus). Anguis--blindworm. Family =Varanidae=. Varanus--monitor. Family =Amphisbaenidae=. Chirotes. Amphisbaena. Family =Scincidae=. Tiliqua (Cyclodus). Scincus--skink. Chalcides (Seps). Group =Rhiptoglossa=. Family =Chamaeleonidae=. Chamaeleon. Suborder (2). OPHIDIA. Family =Typhlopidae=. Typhlops--blind snake. Family =Boidae=. Python. Family =Colubridae=. Tropidonotus--ringed snake. Family =Hydrophidae=--sea snakes. Family =Crotalidae=. Crotalus--rattlesnake. Suborder (3). PYTHONOMORPHA. Family =Mosasauridae=. _Mosasaurus._ Order 7. DINOSAURIA. Suborder (1). SAUROPODA. Family =Atlantosauridae=. _Brontosaurus._ Family =Cetiosauridae=. _Morosaurus._ Suborder (2). THEROPODA. Family =Megalosauridae=. _Megalosaurus_ (_Ceratosaurus_). Family =Compsognathidae=. _Compsognathus._ Suborder (3). ORTHOPODA. Section (_a_). STEGOSAURIA. Family =Scelidosauridae=. _Polacanthus._ Family =Stegosauridae=. _Stegosaurus._ Section (_b_). CERATOPSIA. Family =Ceratopsidae=. _Polyonax_ (_Ceratops_). Section (_c_). ORNITHOPODA. Family =Camptosauridae=. _Hypsilophodon._ Family =Iguanodontidae=. _Iguanodon._ Family =Hadrosauridae=. _Hadrosaurus._ Order 8. CROCODILIA. Suborder (1). PARASUCHIA. Family =Phytosauridae=. _Phytosaurus_ (_Belodon_). Suborder (2). EUSUCHIA. Family =Teleosauridae=. _Teleosaurus._ _Metriorhynchus._ Family =Goniopholidae=. _Goniopholis._ Family =Alligatoridae=. Alligator. Caiman. Jacare. Family =Crocodilidae=. Crocodilus. Family =Garialidae=. Garialis (Gavialis). Order 9. PTEROSAURIA. Family =Pterodactylidae=. _Pterodactylus._ Family =Rhamphorhynchidae=. _Rhamphorhynchus._ Family =Pteranodontidae=. _Pteranodon._ FOOTNOTES: [15] A. Smith Woodward, _Catalogue of Fossil Fishes in the British Museum_, Part II., Introduction, p. xii. [16] This classification of reptiles is mainly based on that of Lydekker (_Catalogue of Fossil Reptiles in the British Museum_) but in some respects that of von Zittel has been followed. CLASS II. AVES[17]. Subclass (I). ARCHAEORNITHES. _Archaeopteryx._ Subclass (II). NEORNITHES. Order 1. RATITAE. Group =Æpyornithes=. _Æpyornis._ Group =Apteryges=. Apteryx--kiwi. Group =Dinornithes=. Moas. Group =Megistanes=. Casuarius--cassowary. Dromaeus--emeu.