FIELD BOOK OF PONDS AND STREAMS 



Range. — Mud-puppies are very common in certain rivers and 

 lakes. In the upper waters of many streams which flow into 

 the Atlantic Ocean; valleys of the Great Lakes and the 

 Tvl ississippi north of the Gulf Stream; Lake Champlain and 

 the upper Hudson; southward into northern Alabama and 

 Arkansas. 



Toads and Frogs. — A7tura. 



Toads and frogs are tail -less amphibians with four legs 

 (Fig. 296). Toads are heavy bodied and awkward, their skins 



rULYTl 



ttbict toe boio 



Fig. 296. — Diagram showing the external struc- 

 tures of toads and frogs. 



are rough and warty, and back of each eye the}'' have a glandu- 

 lar swelling, the parotid gland. 



Toads — BnfonidcB 



American toad, Bufo americanus. — The American toad 

 is the familiar amphibian throughout the eastern states. On j 

 quiet summer evenings it comes out from under verandas and 

 sits on warm door-stones or it patrols the garden for insects. 



368 



