Contents 



HAPTER 



XVII 



XVIII. 



PAG* 



XIX. 



XX. 



XXI. 

 XXII. 



XXIII. 



THE HORNED LIZARDS; Genus Phrynosoma 

 A Genus of Lizards that are Most Commonly 

 Known as the Horned "Toads" . 



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" 

 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 



THE FAMILY Xantusiidce 



A Small Family of Diminutive Lizards Five 

 Species Inhabit Southwestern North America 



THE STRIPED LIZARDS OR "RACE RUNNERS"; 

 Family Teiidce Genus Cnemidophoms 



THE WORM-LIKE LIZARDS 



The Families Euchirotida and Amphisbanida, 

 Embracing the Most Degenerate of the Liz- 

 ards Descriptions of the North American 

 Species . . . 



THE SKINKS OR SMOOTH-SCALED LIZARDS; Family 



Scincidee 



Small, Glossy-scaled Lizards of a Large 

 Family, Represented in North America by 

 Two Genera and Fifteen Species 



1 60 



169 



.78 

 184 



190 



'95 



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 Tropicai 



Families. . . 209 



xvii 



