FROM EGG TO ADULT 



301 



tube. It spends four or five years in the mud along the 

 banks of the stream, while the adult is a free swimmer 



2 



FIG. 337. Life cycle of the frog passed through in four months. 1, mass of eggs; 

 2, month-old legless tadpole. Photograph one half life size. 



(Fig. 215) in the ocean. The young of the bony eel is 

 likewise very different in form from its parent. 



Very remarkable 

 transformations occur 

 among the amphibians. 

 Most of them hi the 

 adult state are air 

 breathers, but with few 

 exceptions the larvse 



Fio 33S. Axolotl or larval form of an am bly- 

 /toma. Photograph from life. 



