CONTENTS XI 



CHAPTER IV 

 STRUCTURE AND CLASSIFICATION OF REPTILES (Reptilia) 



Page 



Structure and Development of the Sand- Lizard (Lacerta agilis), taken as a Type - 191 



Classification of Living Reptiles (Reptilia) 



Order i.— CROCODILES and Alligators (Crocodilia) - ... 204 



Order 2. — Toothless Reptiles (Chelonia) - . . 212 



Structure and Development of the Grecian Tortoise (Testudo Grseca), taken as 



a Type — Turtles and Tortoises - - - 212 



Order 3. — Lizards (Lacertilia) 221 



Order 4. — Snakes (Ophidia) - 227 



Peculiarities of Structure — Non-poisonous and Poisonous Snakes - 227 



Order 5. — Tuataras (Rhynchocephala) - - - 236 



CHAPTER V 



STRUCTURE AND CLASSIFICATION OF AMPHIBIANS (Amphibia) 



Structure of the Spotted Salamander (Salamandra maculosa), taken as a Type 238 



Order I.— TAILED AMPHIBIANS (Urodela)— Salamanders, Newts 245 



Order 2. — Tailless Amphibians (Anura) 249 



Structure and Development of the Grass Frog (Rana temporaria), taken as a 

 Type — Frogs and Toads - 249 



Order 3. — Limbless Amphibians (Gymnophiona) — Caecilians 255 



