Contents 



CHAPTER pAGB 



XVII. THE HORNED LIZARDS; Genus Pbrynosoma 



A Genus of Lizards that are Most Commonly 



Known as the Horned "Toads" . . . 143 

 XVIII. THE PLATED LIZARDS AND SNAKE-LIKE SPECIES 

 The Families Anguidce and Aniellidce, Embracing 

 the North American Genera Gerrhonotus 

 Plated Lizards, Ophisaurus Glass "Snake" 

 and Aniella Ground "Snake" . . .160 

 XIX. THE BEADED LIZARDS; Family H ' elodermatidce 



A Family Composed of but Two Species The Gila 

 Monster and the Mexican Beaded Lizard 

 Both of the Genus Heloderma. Descriptions 

 of the Species Their Habits . . .169 

 XX. THE FAMILY Xantusiidce 



A Small Family of Diminutive Lizards Five 



Species Inhabit Southwestern North America 178 

 XXI. THE STRIPED LIZARDS OR "RACE RUNNERS"; 



Family Teiidce. Genus Cnemidophorus . .184 

 XXII. THE WORM-LIKE LIZARDS 



The Families Eucbiratida and Ampbisbcmidat, 

 Embracing the Most Degenerate of the Liz- 

 ards Descriptions of the North American 

 Species . . ... 190 



XXIII. THE SKINKS OR SMOOTH-SCALED LIZARDS; Family 

 Scincidce 



Small, Glossy-scaled Lizards of a Large 

 Family, Represented in North America by 

 Two Genera and Fifteen Species . -195 



PART IV: THE SNAKES 



Order OPHIDIA 



XXIV. CLASSIFICATION OF THE NORTH AMERICAN SNAKES 207 

 XXV. THE BLIND SNAKES; Family Glauconiidce, AND 

 THE DWARF BOAS; Family Boidce 

 A Few Northern Representatives of Tropical 



Families. . . . . . . 209 



xvii 



