CONTENTS XIU 



Page 



Suborder 3. Meantes 166 



Family i. Sirenidae (Mud eels) 166 



Order 2. Salientia (Frogs; toads) i66 



On the identification of the Salientia 168 



1. The adult 168 



Family i. Discoglossidae 168 



Family 2. Pelobatidae (Spadefoot toads) 169 



Family 3. Bufonidfe (Toads) 170 



Family 4. Hylidce (Tree toads) 1 74 



Family 5. Ranidae (Frogs) 179 



Family 6. Brevicipitidae (Narrow-mouthed toads) 184 



2. The eggs and larvae 185 



CLASS 3. REPTILES 188 



History 188 



Number of species and distribution 188 



Key to the orders of Reptiles 188 



Order i. Crocodilia 189 



Habits and distribution 189 



Family Crocodylidae (Alligators; crocodiles) 189 



Order 2. Lacertilia (Lizards) 191 



Habits and distribution 191 



On the identification of lizards 191 



Family i. Gekkonidae (Geckos) 193 



Family 2. Eublepharidae (Geckos) 193 



Family 3. Iguanidae (Iguanas; swifts) 193 



Family 4. Anguidae 202 



Family 5. Anniellidas ; 203 



Family 6. Helodermatidae 204 



Family 7. Xantusiidae 204 



Family 8. Teiidae (Swifts) 204 



Family 9. Scincidte (Skinks) 205 



Family 10. Leposternidae 207 



Order 3. Serpentes (Snakes) 208 



Habits and distribution 208 



On the identification of snakes 209 



Family i. Leptotyphlopidae 211 



Family 2. Boidte (Boas) 211 



Family 3. Colubridae (Colubrine snakes) 211 



Family 4. Elapidae snakes (Elaphine snakes) 230 



Family 5. Crotalidas (Viperine snakes; rattlesnakes) 230 



Order 4. Testudinata (Turtles) 234 



Habits and distribution 235 



On the identification of turtles 235 



Family i. Kinosternidas (Mud turtles; musk turtles) 237 



Family 2. Chelydridae (Snapping turtles) 239 



Family 3. Testudinida; (Pond turtles; land turtles) 239 



Family 4. Trionychid^e (Soft-shell turtles) 249 



Family 5. Cheloniidae (Marine turtles) 250 



Family 6. Demochelidae (Marine turtles) 251 



CLASS 5. MAMM.Ar.S 252 



On the identification of mammals 252 



History -54 



