CADUCIBRANCH1ATA. 95 



branous above ; parietals distinct, scale-like ; limbs long, 

 slender, weak, and distant from each other; toes short. 

 Length 6Y% inches. 

 Tail 4%; " 



Habitat Costa Rica. 



9. Hynobius, Tschudi. 



Synonyms, Hynobius and Pseudo-Salamandra, Tschu- 

 di; Hynobius and Molge, Gray; Ellipsoglossa, Dumeril 

 and Bibron, Hallowell. 



Vomerine and palatine bones not dent igeroits ; sphenoi- 

 dal teeth in two rows, one on each side of the median 

 line, divergent in front and approximated behind, thus 

 resembling a V; tongue oval, &\\\xt,free only upon its 

 sides; toes four in front, five behind ; tail much compress- 

 ed. Species both aquatic. 



This genus is especially characterized by the arrange- 

 ment of the teeth, it being the only one in which the 

 sphenoidal teeth are widely divergent in front, and also 

 by having the tongue attached anteriorly and posterior- 

 ly, and hence not protrusible. 



Body short and thick; color vellowish brown. 



H. nebulosus. (1 ) 



Body very much elongated ; color bluish or slaty gray. 



•H. Ngevius. (2) 



