Observations on the Genus Salamandra. 233 



The lateralis and Alleghaniensis not belonging to any of these, 

 will require appropriate generic names, in order to introduce 

 them to that independent station in the systems, to which they 

 possess every claim. As the most prominent feature distin- 

 guishing the T. lateralis from the Salamandra is its persistent 

 branchiae, we have preferred a name significative of the same. 

 The Alleghaniensis, on the contrary, being characterized by 

 the negation of branchiae, the most appropriate name will be 

 one expressive of that circumstance ; the specific appellations 

 being sufficiently discriminative, must remain. 



Genus I. Menobranchus. 



Generic characters. — Persistent branchiae ; two rows of teeth 

 in the upper, and one row in the lower jaw ; four-footed, 

 four toes to each foot ; clawless. 



Menobranchus lateralis. — A black vitta from the nostrils pass- 

 ing through the eyes, and dilated on the sides, becoming- 

 obsolete on the tail. 



Menobranchus tetradactylus. — Two rows of teeth in each jaw ; 

 duplicature of skin, forming a collar on the superior part 

 of the neck, immediately anterior to the branchiae. 



Genus II. Abranchus. 



Generic characters. — Destitute of branchiae at all periods of 

 its existence ; four strong legs ; five toes to the posterior, 

 four to the anterior extremities ; the outer edge of the feet 

 fimbriated ; two outer toes of the hind feet palraated ; claw- 

 less. 



Abranchus Alleghaniensis. 



32 



