Contents 



VIII. THE SOFT-SHELLED TURTLES; Genus Trionyx. Fam- 

 ily Trionycbida 

 Strongly Characteristic Chelonians, with a Soft, 



Leathery Shell ...... 72 



PART II: THE CROCODILIANS 

 Order CROCOD1LIA 



IX. THE CROCODILIANS; Order Crocodilia 



An Order Represented by Two Species in the United 

 States The American Crocodile and the 

 Alligator ....... 83 



PART ni: THE LIZARDS 



Order LACERT1L1A 



X. THE LIZARDS 



Classification of North American Lizards . . 95 

 XI. THE GECKOS; Families Geckonida and EubUpbarida 

 A Large Group of Granular-scaled Lizards, Repre- 



sented by Four Species in North America . 97 

 XII. THE AMERICAN CHAMELEON; Genus Anolis 



The North American Representative of a Large, 

 New World Genus of Lizards that are Re- 

 markable in the Habit of Frequently Changing 

 their Colours . . . . . .102 



XIII. THE IGUANAS 



Large Species that May be Recognised by their 



Fine Scalation and Spine-like Crest. . .106 

 XIV. THE GENERA Sauromalus AND Crotapbytus. 



Fine-scaled Representatives of the Iguanidce . .in 

 XV. THE SPOTTED LIZARDS; ZEBRA-TAILED LIZARDS 

 Small and Strictly Terrestrial Species of the Genera 



Callisaurus, Uma, and Holbrookia . . .116 

 XVI. THE SWIFTS 



Two Genera Ufa and Sceloporus Small, Rough- 



scaled Lizards ...... 122 



xvi 



