Contents 



CHAPTER 



XVII. The Horned Lizards; Genus Phrynosoma 



A Genus of Lizards that are Most Commonly 



Known as the Horned "Toads" . . . 143 



XVni. The Plated Lizards and Snake-ijke Species 

 The Families Angttida; and Aniellidce, Embracing 

 the North American Genera Gerrhonotus — 

 Plated Lizards, Ophisaiiriis — 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 Xanhisiidce 



A Small Family of Diminutive Lizards — Five 



Species Inhabit Southwestern North America 178 

 XXI. The Striped Lizards or "Race Runners"; 



Family Teiida — Genus Cncmidophorus . .184 



XXII. The Worm-like Lizards 



The Families Euchiroiidce and AmphishanidcE, 

 Embracing the Most Degenerate of the Liz- 

 ards — Descriptions of the North American 

 Species . . . . .190 



XXIII. The Skinks or Smooth-scaled Lizards; Family 

 Scincida 



Small, Glossy-scaled Lizards of a Large 

 Family, Represented in North America by 

 Two Genera and Fifteen Species . '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 Boidc€ 

 A Few Northern Representatives of Tropical 



Families. ...... 209 



xvii 



