FROGS AND TOADS. 



121 



breathe by lungs. P'or example, the young frog or 

 tadpole, when first hatched, appears as m Figure 177, 

 with the gills in tufts on the two sides of the neck; 

 later, it appears as in Figure 1 78, where the gills are 

 concealed; later, it appears as in Figure 179, where it 

 has hind legs; later, as in Figure 180, with four legs; 

 later still, as in Figure 181, where the tail has mostly 

 disappeared ; and later still, it becomes a perfect frog. 



Frogs and Toads. 



These have the body short and thick ; the tongue 

 is long and fixed to the fore part of the jaw, and its tip 

 is turned backward into the mouth, from which it can 

 be darted forth quicker than a glance of the eye ; and it 

 is by means of the tongue that Frogs and Toads snap 

 up insects and worms, which form their principal food. 

 The Bullfrog is our largest kind, and is well known by 

 its croakings, which may be heard a mile. The Green 



Fig. 183. —Leopard Frog. 



Frog, Leopard Frog, and Pickerel Frog, are found 

 about ponds and streams. The Wood Frog lives on 

 land, and goes to the water only in spring to lay its 

 eggs. The Tree Frogs, or Tree Toads, have toes that 



