[ohthyopsida 



453 



Fig 349. The perennibranch and derotreme salamanders. (A) Typhlomolgerath- 

 buni. (B) Amphiuma means. (C) Necturus maculosus. (D) Siren lacerlina (E) Cryp- 

 tobranchm alleganiensis. (By permission from "Biology of the Amphibia, by 

 G. K. Noble, copyrighted 1931. McGraw-Hill Book Co., Inc.) 



