CLASS IV. AMPHIBIA. 



ORDER I. CADUCIBRANCHIA. 



Gills deciduous. 



I. RANID./E. No tail in the adult state: fore 

 feet with four toes; hind feet with five, or with 



the rudiment of a sixth. 



1. RANA. Skin smooth : hind feet very long, adapted 

 for leaping ; more or less palmated : upper jaw with a 

 row of small fine teeth ; also a transverse interrupted row 

 on the middle of the palate. 



2. BUFO Body swollen : skin warty ; a porous pro- 

 tuberance behind the ears : hind feet of moderate length : 

 jaws without teeth. t 



II. SALAMANDRID^. Body elongated; tail 

 always present : fore feet with four toes ; kind 



feet with five. 



3. TRITON. Tail compressed: jaws furnished with 

 numerous small teeth ; two longitudinal rows of similar 

 teeth on the palate. 



