AMPHIBIA 201 



The large blunt-nosed salamander (AmUystoma tigrinum) 

 and the gray species (Amblystoma opacum) may often be 

 dipped up with a long-handled net from the sluggish waters 

 near woodlands where they come in early spring to 

 breed. The eggs, numbering several hundred, appear like 

 shot in a colorless, jelly like mass of albumen as large 

 as the human fist. 



The red-backed salamander (Plethodon cinereus) is com- 



FlQ. 231. Plethodon cinereus. Photograph natural size. 



mon under stones and logs in and near the woods. The 

 mountain salamanders of the genus Desmognathusare often 

 found under the loose stones in the cold forest streams of 

 the liighlands. Though most of the amphibians have 

 lungs in the adult state the species of the genera Spelerpes 

 and Plethodon have neither gills nor lungs when mature. 

 The blood is relieved of its carbon dioxide and receives 

 oxygen by means of the capillaries lying near the surface 



