CONTENTS. 



Page. 



Letter of transmittal 5 



Batrachia 7 



General characters 7 



General anatomy 7 



Larval characters 12 



Classification 13 



Affinities 13 



Phylogeny 14 



Explanation of terms 16 



Nomenclature and history 16 



Proteida 21 



Urodela 29 



Trachystomata 223 



Salientia 232 



Eecapitulation 451 



Addenda 453 



Bibliography 461 



Addendum to bibliography • 485 



List of cuts 489 



Explanation of lettering on plates. 493 



Explanation of plates 497 



Index , 517 



6 • 



