REPTILES 291 



Classification of Reptiles 



Order I. Chelonia (turtles and tortoises). Flattened reptiles with body en- 

 closed in bony case. No teeth or sternum (breast bone). Examples, snapping 

 turtle, box tortoise. 



Order II. Lacertilia (lizards). Body covered with scales, usually having two- 

 paired appendages. Breathe by lungs. Example, fence lizard, horned toad. 



Order III. Ophidia (snakes). Body elongated, covered with scales. No limbs 

 present. Examples, garter snake, rattlesnake. 



Order IV. Crocodilia. Freshwater reptiles with elongated body and bony scales 



on skin. Two paired limbs. Examples, alligator, crocodile. i 



Reference Books 

 for the pupil 



Davison, Practical Zoology, pages 211-226. American Book Company. 

 Herrick, Text-hook in General Zoology, Chap. XXI. American Book Company. 

 Jordan, Kellogg, and Heath, Animal Studies, Chap. XVI. D. Appleton and 

 Company. 



FOR THE TEACHER 



Riverside Natural History. Houghton, Mifflin, and Company. 



Parker and Haswell, Text-book of Zoology. The Macmillan Company. 



