Contents. 



CHAPTER V. 



ORDER 3. GANOID FISHES. ORDER 4. BONY FISHES. 



ORDER 5. DIPNOI. 



PAGB 



Ganoids Scales Isinglass Teleostei Sub-order, Physo- 

 stomi Sub-order, Anacanthini Sub-order, Acantho- 

 pteri Sub-order, Pharyngognathi Sub-order, Lopho- 

 branchii Sub-order, Plectognathi Dipnoi . .26 



CHAPTER VI. 



CLASS 2. AMPHIBIA. 



General Characters Respiration Skeleton . . 34 

 CHAPTER VII. 



CLASSIFICATION OF AMPHIBIA. 



Order i, Gymnophiona Labyrinthodonts Order 2, Urodela 

 Caducous and Perennial Gills Order 3, Anura . . 37 



CHAPTER VIII. 



CLASS 3. REPTILES. 



General Characters . ,40 



CHAPTER IX. 



LIZARDS AND SNAKES. 



Order i, Lacertilia Chamseleons Order 2, Ophidia or Snakes 

 Venomous Snakes and their Poison-Apparatus . . 42 



CHAPTER X. 



TORTOISES AND CROCODILES. 

 Order 3, Chelonia or Tortoises Order 4, Crocodilia . . 49 



