86 REPTILIA. 



GENUS I. RANA, Lin. Frog proper. 



Skin smooth; body tapering; hind feet very long and 

 more or less palmated ; a row of small teeth all round the 

 upper jaw ; under each ear, in the males, a fine membrane, 

 which becomes inflated when they cry out ; these animals 

 swim and leap very well. 



GENUS II. HYLA, Laur. Tree-Frog. 



Same characteristics as the frogs ; the only difference lies 

 in a kind of rounded viscous pellet placed upon each toe, and 

 which enables them to adhere to the smoothest bodies, and 

 to run upon the leaves of trees with the feet upwards. 



GENUS III. BUFO, Laur. Toad. 



A thick bulky body ; skin covered with warty excrescences ; 

 hind legs short; a thick lump, pierced with pores, behind the 

 ears, which emits a milky, fetid humour. No teeth. 



GENUS IV. PIPA, Laur. 



Body flattened horizontally ; head triangular ; no tongue ; 

 each of the fore toes divided into four small parts at the ex- 

 tremity ; the species best known inhabits South America, and 

 presents a very remarkable phenomenon. The male places 

 the eggs upon the back of the female who repairs to the 

 water; the skin of the back there swells and forms little 

 cells, where the young inclose themselves during the meta- 

 morphosis. 



FAMILY II. SALAMANDRA. 



Four feet; a tail as in the Lizards; very small ribs; in the 

 adult state, respiration as in the Ranse, except in three genera, 

 where branchiae exist through life ; branchial arches in the 

 Tadpole inclosed in a tunic, and floating externally; fore feet 

 appear before the hind ones. 



-"" - : , ' f ' ' . '*'*'' : '."*'; . ' ,5. r *.' '''*-'*' '.. -" i 



GENUS I. SALAMANDRA, Laur. Terrestrial Salamander. 



In the perfect state, tail round ; four toes before, generally 

 five behind ; existence as a Tadpole brief. 



GENUS II. TRITON, Laur. Aquatic Salamander. 



Tail compressed at the sides ; astonishing power of repro- 



