DESCRIPTION^ OF A NEW SALAMANDER FROM ARKANSAS 

 WITH NOTES ON AMBYSTOMA ANNULATUM. 



By Leonhard Stejneger, 



Curator of the Department of Reptilen and Batrachians. 



Among some specimens recently received from Hot Springs, Ark., 

 through Messrs. H. H. and C. S. Brimley, there are two species of sala- 

 manders which are interesting in the highest degree, as one represents 

 a new species of DesmognathuSj while the otlier is the second specimen 

 of A mby stoma annulatum, the first one which with certainty establishes 

 this species as North American, as the locality of the type and hitherto 

 unique specimen is unknown. 



DESM0GNATHU8 BRIMLEYORUM, ucav species. 



Diagnosis. — Mandibuhir alveolar margin continuous and completely 

 tootbed; tail compressed, keeled, finned; a tubercle in canthus oculi; 

 14 costal folds; gular fold absent, or verj" faint; parasphenoid patches 

 not separated anteriorly; vomerine series, when i)resent, long and 

 oblique; underside pale with faint dusky mottling, if any. 



Habitat. — Hot Springs, Ark. 



Type. — U. S. National JVIuseum No. 221.57. 



Description. — Head rather large; body long and slender; tail shorter 

 than head and body; limbs short, when adpressed not meeting by 

 four or four and a half costal interspaces; digits short, variable in pro- 

 portion, but outer finger usually considerably reduced. 



Costal grooves, including the axillary and inguinal, 14; gular fold 

 absent, or but feebly indicated; a vertical groove behind the angle of 

 the mouth, and another a little distance in front of fore limb, the former 

 connected with the posterior angle of the eye, all very faint; a well- 

 marked i)apilla in the angle of the eye; a vertical groove from nostril 

 to edge of lii>. 



Maxillary and mandibular teeth small, numerous, and continuous 

 almost to the angle of the mouth, all very blunt, except those on the 

 premaxillaries, which are sharp and pointed; vomerine teeth, when 

 present, in two long series posteriorly nearly parallel but diverging 

 anteriorly outward toward the choana^, from which thej^ are separated 



Pioceedings of the U. S. isatioual Museum, Vol. XTII — Xo. 1023. 



597 



