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ANIMALS CLASSIFIED 



CLASSIFICATION OF AMPHIBIA 



ORDER I. Urodela. Amphibia having usually poorly developed appendages. 

 Tail persistent through life. Examples : mud puppy, newt, salamander. 



ORDER II. Anura. Tailless Amphibia, which undergo a metamorphosis, breath 

 ing by gills in larval state, by lungs in adult state. Examples : toad and frog. 



Characteristics of Reptilia. 



- These animals are char 

 acterized by having scales 

 developed from the skin. In 

 the turtle they have become 

 bony and are connected with 

 the internal skeleton. Rep 

 tiles always breathe by means 

 of lungs, differing in this 

 respect from the amphibians. 

 They show their distant re 

 lationship to birds in that 

 their large eggs are incased 

 in a leathery, limy shell. 



The leopard frog, an amphibian. 



CLASSIFICATION OF REPTILES 



ORDER I. Chelonia (turtles and tortoises). Flattened reptiles with body inclosed 



in bony case. No teeth or sternum (breastbone). Examples: snapping 



turtle, box tortoise. 

 ORDER II. Lacertilia (lizards). Body 



covered with scales, usually having 



two-paired appendages. Breathe 



by lungs. Examples : fence lizard, 



horned toad. 



Box tortoise, a land reptile. (From 

 photograph loaned by the Ameri 

 can Museum of Natural History.) 

 About one fourth natural size. 



The gila monster, a 

 poisonous lizard. 

 About one twelfth 

 natural size. 



