© ^r t 



STAGES IN THE DEVELOPMENT OF THE FROG. 



I shows tlie egg, 2 and 3 the larval, and 4,-7 the tadpole stages, to is 

 the adult stage. (Photo by W. B. Johnson.') Fig. 8 shows the mouth of the 

 tadpole, liighly magnified, and 9 the teeth. 



182] 



