CONTENTS. Vll 



PAGE 



Order II. Physostomi ...... 255 



Order III. Synentognathi 257 



Order IV. Hemibranchii 257 



Order V. Lophobranchii 258 



Order VI. Acanthopterygii .... 258 



Order VII. Pediculata 266 



Order VIII. Plectognathi 266 



Sub-Class III. Dipnoi 267 



Order I. Arthrodira 271 



Order II. Sirenoidea 272 



Class II. Amphibia 274 



Sub-Class I. Stegocephali 283 



Order I. Lepospondyli 283 



Order II. Temnospondyli ..... 283 



Order III. Stereospondyli 284 



Sub-Class II. Urodela 284 



Order I. Perennibranchiata .... 284 



Order II. Derotremata ..... 285 



Order III. Salarnandrina ..... 285 



Sub-Class III. Anura 286 



Order I. Aglossa 286 



Order II. Arcifera ...... 286 



Order III. Firmisternia 287 



Sub-Class IV. Gymnophiona 287 



Grade II. Amniota 288 



Class I. Sauropsida 291 



Sub-Class I. Reptilia 292 



Order I. Theromorpha 34 



Order II. Plesiosauria 36 



Order III. Chelonia 37 



Order IV. Ichthyosauria 312 



Order V. Rhynchocephalia .... 313 



Order VI. Dinosauria ...... 3 J 4 



Order VII. Squamata 3 J 7 



Order VIII. Crocodilia 3 2 6 



Order IX. Pterodactylia 3 2 9 



Sub-Class II. Aves 33 



Order I. Saururae .... 343 



Order II. Odontormae ...... 344 



Order III. Odontoholcae 344 



Order IV. Eurhipidurse 345 



Class II. Mammalia 3S 2 



Sub-Class I. Prototheria 37 6 



Order I. Monotremata ..... 37^ 



Order II. Protodonta 377 



Order III. Multituberculata .... 377 



Sub-Class II. Eutheria 37 8 



Legion I. Didelphia 37^ 



