HAsic HKi'iionrcrn K wn iiEiiKDiry riiKXoMENA ')') 



wliicli it loses its ('(luipiufiil tdr stiiclly .•HHiatic life (ljirv;il 

 clKirac'tcristics) and assuiiu's the form, struct urc, and liahits of 

 the adult. There can he ohserved tluring the metamorphosing 

 period the resorption of the tail, the extension of the mouth 

 cleft, the elevation of the eyes, the perforation of the integument 

 of shoulder region by the arms, and many other transformations. 

 If time permits, study preserved specimens or models of the three 

 larval periods of the frog. 



Arrange the material provided for study (i.e., segmenting eggs, 

 embryos, and larvae) in order ranging from the earliest to the 

 latest stages and demonstrate to the instructor, pointing out 

 not only the stages themselves but also characteristic features 

 of each. 



