xxii STORY OP THE AMPHIBIANS 



PAGE 



Skull of Rana esculenta 53 



Slab of sandstone, with amphibian footprints , . .59 



Jaw of Denclrerpeton acadeanum GO 



Section of hollow stump filled with sandstone ... GO 



Archegosaurus " . . 61 



Ptyonius Gl 



Limnerpeton laticeps 61 



Mastodonsaurns Jaegeri 63 



Trematosaurus . . . 63 



Section of tooth of labyrinthodont 63 



Serpent . 73 



Lizard 72 



Crocodiles 73 



Tnatera 73 



Foot of a chameleon 75 



Glass-snake 78 



Spine-tailed lizard 81 



Sea-snake 83 



Whip- or tree-snake .83 



Shield-tail snake 84 



Pterodactyl 85 



Ramphorhynchus .86 



Action of crocodile's jaw 88 



Dasypeltis-unicolor swallowing fowl's egg .... 91 



Dicynodon lacerticeps 93 



Lycosaurus 93 



Rhynchosaurus .93 



Skull of rattlesnake 94 



Anolis or American chameleon ,96 



Horned toad 103 



Head of leguan 104 



