ANOURA OR FROGS, ETC. 



239 



thick body, and a long compressed tail, and which feed 

 upon vegetable food. As they grow older, the extremities 



FIG. 272. 



FIG. 273. 



FIG. 274. 



FIG. 275. 



FIG. 276. 



FIG. 277. 



Changes in the form of Frogs and Toads from the time of hatching. 



appear, the tail is gradually absorbed, the gills are super- 

 seded by lungs, which heretofore were undeveloped, .and 

 the animal becomes air-breathing and carnivorous. 



The Bull-frog, Leopard-frog (Fig. 270), Pickerel-frog, 

 Wood-frog, etc., are prominent representatives of the true 

 frog family or Jiaiiida?, which have the toes free, and 

 never dilated into a disk. 



The Tree-frogs or " Tree-toads " or Hyloidse have the 

 extremities of the toes enlarged into a 

 disk, by means of which they sustain them- 

 selves on the trunks and branches of trees. 

 Those called Cricket-frogs (Hi/lodes) are 

 very small, and are found on plants near 

 the water, where their shrill piping note 

 may be heard all the night, in summer. 



The Toads or Bnfonidse have the body warty above and 

 granulated beneath ; and the upper jaw and palate, in most 

 cases, destitute of teeth. They are mainly nocturnal in 

 their habits. They live upon the land, except in the 



Cricket-frog. Uij- 

 lodes Pickerinyii, 

 Holbrook. 



