CONTENTS XV 



Page 



Superfamily A. Cryptobranchidea 137 



Family i. Cryptobranchidae (Hellbenders) 137 



Superfamily B. Salamandroidea 137 



Family 2. Pleurodelida; (Newts) 138 



Family 3. Ambystomidae (Salamanders) 139 



Family 4. Plethodontida^ (Salamanders) 143 



On the identification of the larvie of the Plethodontidae 153 



Family 5. Amphiumida; (Congo snakes) 154 



Family 6. Pro teidse (Mud puppies) 155 



Suborder 2. Meantes 155 



Family Sirenidas (Mud eels) 155 



Order 2. Salientia (frogs; toads) 156 



On the identification of the Salientia 157 



1. The adult 157 



Key to the families of the Salientia 158 



Family i. Discoglossida; 158 



Family 2. Pelobatidae (Spadefoot toads) 158 



Family 3. Bufonidae (Toads) 159 



Family 4. Hylidae (Tree toads) 164 



Family 5. Ranidse (Frogs) 168 



Family 6. Microhylidae (Narrow-mouthed toads) 173 



2. The eggs and larvas 1 73 



Key to the eggs of some of the common eastern frogs and toads 174 



Key to the tadpoles of some of the common eastern frogs and toads ... 175 



CLASS 3. REPTILES 177 



History 177 



Number of species and distribution 177 



Key to the orders of Reptiles 177 



Order i. Crocodilia 



Habits and distribution 178 



Family Crocodylidse (Alligators; crocodiles) 



Order 2. Lacertilia (Lizards) 179 



Habits and distribution 180 



On the identification of lizards 180 



Key to the families of American Lacertilia 



Family i. Gekkonidse (Geckos) 



Family 2. Iguanidae (Iguanas; swifts). 



Family 3. Anguidae 



Family 4. Anniellidae 



Family 5. Helodermatidae 



Family 6. Xantusiidae 



Family 7. Teiidae (Swifts) 



Family 8. Scincidae (Skinks) 



Family 9. Amphisbaenidas 



Order 3. Serpentes (Snakes) 



Habits and distribution 



On the identification of snakes . . . . 

 Key to the families of Serpentes. . . . 

 Family i. Leptotyphlopidae 



Family 2 

 Family 3 

 Family 4 

 Family s 



99 

 200 



Boidae (Boas) 



Colubridae (Colubrine snakes) 200 



Elapidae snakes (Elapine snakes) 220 



Crotalidae (Viperine snakes; rattlesnakes) 221 



