CLASS OF BATBACHIANS. 



365 



and of the young of reptiles during incubation ; at birth, they 

 strongly resemble fishes. 



Fig. 367. The Toad. 



The young batrachia are known by the name of tadpoles 

 (tetards), and are formed for an aquatic life: at birth they have 



Fig 368. Tadpole of the Frog. 



a tail, but no feet ; gills projecting externally (b b, Fig. 368), 

 and their skeleton is cartilaginous. 



