586 



INDEX. 



Amphibia — continued. 



Blind-worms ..... 



Amphibia without gills 



An exception to the universality of metamorph 



Amphiumas ..... 



Gigantic salamander .... 



Tiie " Hell-bender " .... 



Amphibia with permanent gills . 

 Four genera known, Axolotus, jMonobranchus, 

 and Siren ..... 



Axolotle ...... 



Snake-like proteus .... 



Its curious branchial organs 



Mud-eel 



Batrachian amphibia .... 



Their metamorphosis 



Batrachia divisible into two sections 



Tailed batrachians .... 



Terresh-ial salamander 



Great warty newt .... 



Smooth newt ..... 



Tailless bati-achia .... 



Frogs 



Curious arrangement of their tongue 



How distinguished from toads 



Tree frogs ..... 



Toads ...... 



Pipas . . . . 



CHAPTER XXV, 



Serpents 



First order of true Reptiles . 



Their formidable attributes 



Water serpents . ... 



Sea or pelagic serpents • 



Fresh-water snakes 



Venomous serpents 



Their poison most potent 



Poison fangs .... 



Poison glands .... 



Rattlesnakes .... 



Fer-de-lance 



Horned vipers .... 



Viper ..... 



Boas ..... 



Boa-constrictor, teeth of 



Special contrivance to aid deglutition 



Anaconda .... 



Harmless snakes 



Common ringed snakes 



Double walkers 



Lizards, their resemblance to serpents 



Saurians, their diverse habits 



