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Tribe I. MUTABILIA. 



CHARACTERS. 



The animals of this tribe undergo a complete metamorphosis; the young 

 breathe only in water, and with gills, like fish; but in their adult state, respiration 

 is performed with lungs. 



The tribe Mutabilia includes two genera, Salamandra and Triton, distinguished 

 by their mode of existence, whether terrestrial or aquatic, and each with its 

 peculiar and appropriate organization. 



