678 



PHYLUM CHORDATA : CLASS AMPHIBIA 



Family 2. Salamandridae. — Salamandra maculosa and S. atra, both 

 European, both viviparous ; the usually oviparous newts 

 — Triton or Molge — of which Triton alpestris becomes 

 sexually mature while still larval {pedogenesis). Desmognathus 



Fig. 389.— Male (M.) and female (F.) of the Crested Newt {Triton or 

 Molge cristatus), a typical Urodele. — From Specimens. 



Fig. 390. — The Axolotl {Amblystoma tigrinum), a permanently larval 

 phase, with three pairs of gills. It may reproduce in this phase, 

 or it may change into an adult Amblystoma form without gills, 

 and with a different shape of head. — From a living Specimen. 



fusca, the common lungless water salamander of the United 

 States, lays its eggs in a wreath which the female twines 

 round its body. The N. American Amblystoma, with its 

 sometimes persistent larval form the Axolotl, formerly thought 

 to be a different species. 



