io THE FROG CHAP. 



weeds. They are thus in the main vegetable-feeders, not 

 carnivorous, like the adult frog. On each side of the head 

 appear three little branched tufts or gills, which serve as 



FIG. i. Stages in the life-history of the Common Frog, from the newly-hatched 

 tadpoles (i) to the young frog (8) ; -za isa magnified view of 2. (After Mivart.) 



respiratory organs (2, 2 a ), the tadpole, like a fish, breathing 

 air which is dissolved in the water. After a while the gills 

 begin to shrivel up (3, 4), and the tadpole then comes 

 periodically to the surface to breathe, lungs having in the 



