LIST OF ILLITSTRATIOKS 



Frog in action .... 



Giant salamander , 



Slender cscilia— White-bellied csecilia 



Congo snake .... 



Spadefoot frog 



Surinam toad and tadpole 



Flying tree-frog 



Head of frog .... 



Tooth of labyrinthodont . 



Horned frog of South America 



Common toad .... 



Green frog .... 



Bullfrog 



Tree-toad 



Crested newt, male and female 



Eggs of bird, toad, fish, butterfly, katydid, skate 



Development of frog 



Pouched frog .... 



Tree-frog of Dutch Guiana 



Axolotl, tadpole state 



Axolotl, adult .... 



Obstetric frog .... 



Skeleton of frog 



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