722 AMPHIBIA — SALAMANDEID^. 



Amblystoma microstomum Cope. 

 Small-Mouthed Salamander. 



Triton porphyriticus, (?) Holbrook. 



Color in alcohol brownish black, paler beneath'; plumbeous spots of indefinite outline 

 scattered thickly and irregularly over the sides, sometimes wanting, at others lioheni- 

 form ; tail round or nearly so at the base, but becoming ensiform towards the end ; body 

 slender ; length about thirteen times its greatest diameter ; head narrower than and not 

 separable from the body ; projection of upper jaw not as great as that of the lower; 

 dorsal furrow present, but not deeply indented; mucous pores of the head not different from 

 those of the body ; lingual longitudinal furrow present ; length at loss of branchiae, 2 

 2-5 iuohes ; length, 4 inches ; tail, li inches ; body, 2J inches ; head to cervical fold, .45 

 inch ; diameter of head, .31 inch. 



Habitat, Illinois, Missouri, Arkansas, and Ohio to Louisiana. 



This species very closely resembles Plethodon glutinosm, but is distin- 

 guished from it by the arrangement of the teeth in a transverse unin- 

 terrupted row, arched in front instead of being separated by a wide in. 

 terval, and also by the tail being very much compressed laterally ; while 

 in P. -glutinosus it is cylindrical, or only slightly compressed. Triton 

 porphyriticus of DeKay is probably Plethedon glutinosus. 



Amblystoma xiphias Cope. 



liOng'-Tailed Salamander. 



Color yellowish olive, brighter yellow beneath ; sides and back with brown anasto- 

 mosing or reticulating bands; head small; cheeks swollen; eyes rather small, but 

 distinct ; mandible projecting ; outer nares nearer together than the inner ; tongue 

 large ; vomerine teeth V-form, at an obtuse angle, interrupted along the median line 



Genus HEMIDACTYLIUM. Tschudi. 

 Desmodactyhis, Dumeril and Bibron. 



Vomerine teeth in two rows, one on each side behind the inner nares, sphenoidal 

 also in two groups, separated from the lormer and each other ; tongue oval, adherent 

 in front ; parietal bones osseus ; premaxillaries two ; fontanelle wanting ; toes rudi- 

 mentary, palmate at^base, four in front and four behind. 



Hemidactylium scdtatum Schlegel. 



Four-toed Salamander. 



Salamandra fuaoa, 6rt!en, Jour. A. N. Science, Phil., 1818, page 357, not of Rafinesque. 



Salamandra scututa, Schlbgel. 



Salamandra melanostica, Gibbes. 



Desmodaciylus melanostious, Dumerii, and Bibron. 



Hefmidactylmm scutatum, TscHUDi, Baird, Cope, Jordan. 



