A HISTORY OF THE FROG KIND. 



697 



OF 



OF FROGS AND TOADS. 



CHAPTER CLVII. 



OF FROGS AND TOADS IN GENERAL. 



IF we emerge from the deep, the first and 

 most obvious class of amphibious animals that 

 occur upon land are frogs and toads. These, 

 wherever they reside, seem equally adapted 

 for living upon land and in the water, having 

 their hearts formed in such a 'Manner as to 

 dispense with the assistance of the lungs in 

 carrying on the circulation. The frog and 

 the toad therefore can live several days under 

 water, without any danger of suffocation ; 

 th-'y want but little air at the bottom; and 

 what is wanting is supplied by lungs, like 

 bladders, which are generally distended with 

 wind, and a iswer all the purposes of a reser- 

 voir from whence to breath. 



To describe the form of animals so well 

 known would be superfluous; to murk those 

 differences that distinguish them from each 

 other may be necessary. The frog moves by 



leaping ; the toad crawls along the ground : 

 the frog is in general less than the toad, its 

 colour is brighter, and with a more polished 

 surface ; the toad is brown, rough, and dusty. 

 The frog is light and active, and its belrjr 

 comparatively small ; the toad is slow, swol- 

 len, and incapable of escaping. The frogj 

 when taken, contracts itself so as to have a 

 lump on its back; the toad's back is straight 

 and even. Their internal parts are nearly 

 the same, except that the lunsof the toad are 

 more compact than those of the frog ; they 

 have fewer air-bladders, and of consequence 

 the animal is less fitted for living under water. 

 Such are the differences with respect to figure 

 and conformation ; their habitudes and man- 

 ners exhibit a greater variety, and require a 

 separate description. 



CHAPTER CLVIH. 



OF THE FROG, AND ITS VARIETIES. 



T T IE external figure of the Frog is too \\ nature hath finely adapted Tt<? parts for those 



wHI knoA'n to need a descrin'ion. Its power 

 of taking large leaps is remarkably great, 

 compared to the bulk of if body. l'i is the 

 best swimmer of all four-footed animals; and 



ends, the arms being light and active, the legs 

 and thighs long, and furnished with very 

 strong mnsrles. 



If we examine this animal internally, we 



