XIST OF ILLUSTEATIONS 



PAaB 



Prog in action 3 



Giant salamander ....:,.,, 4 



Slender csBcilia — White-bellied caecilia 5 



Congo snake 8 



Spadefoot frog 9 



Surinam toad and tadpole 10 



Plying tree-frog . , .11 



Head of frog 12 



Tooth of labyrinthodont . . . . ; ' . . .15 



Horned frog) of South America 16 



Common toad 30 



Green frog 30 



Bullfrog 31 



Tree-toad 31 



Crested newt, male and female . . ... . .37 



Eggs of bird, toad, fish, butterfly, katydid, skate ... 31 



Development of frog .33 



Pouched frog 36 



Tree-frog of Dutch Guiana 37 



Axolotl, tadpole state . . . , 38 



Axolotl, adult 39 



Obstetric frog 40 



Skeleton of frog 51 



