CONTENTS 



CLASS AMPHIBIA 



Order Caudata 



Suborder Proteida 



Family Necturidae 



Genus Necturus 



Suborder Mutabilia 2 



Family Amphiumidae 2 



Genus Amphiuma 2 



Family Cryptobranchidae 2 



Genus Cryptobranchus 2 



Family Salamandridae 3 



Genus Triturus 3 



Family Ambystomidae 4 



Genus Ambystoma 4 



Genus Dieamptodon 7 



Genus Rhyaeotriton 8 



Family Plethodontidae 8 



Genus Batrachoseps 8 



Genus Hemidactylium 10 



Genus Plethodon 10 



Genus Ensatina 13 



Genus Typhlotriton 14 



Genus Stereochilus 14 



Genus Typhlomolge 14 



Genus Gyrinophilus 15 



Genus Manculus 15 



Genus Pseudotriton 16 



Genus Eurycea 1"^ 



Genus Hydromantes 20 



Genus Aneides 20 



Genus Desmognathus 21 



Genus Leurognathus 23 



Suborder Meantes 23 



Family Sirenidae 23 



Genus Siren 23 



Genus Pseudobranchus 24 



Order Salientia 25 



Suborder Costata 25 



Family Ascaphidae 25 



Genus Ascaphus 25 



Suborder Linguata • 25 



Family Scaphiopodidae 25 



Genus Scaphiopus 25 



^lUl 



