44 CADUCIBRANCHIATA. 



diameter of head three-quarters the distance from muz- 

 zle to cervical fold, eyes prominent ; nares equidistant. 



Length 4^ inches. 



Habitat Oregon and Washington Territory. 



8. Ambly»toma mfcrostomum. Cope. 



Synonym, Triton porphyriticus, (?) Holbrook. 



Color in alcohol brownish black, paler beneath ; plum- 

 beous spots of indefinite outline scattered thickly and ir- 

 regularly over the sides, sometimes wanting, at others 

 ficheniform ; tail round or nearly so at the base, but be- 

 coming ensiform towards the end; body slender; length 

 about thirteen times its greatest diameter ; head narrow- 

 er than and not separable from the body ; projection of 

 upper jaw not as great as that of the lower ; dorsal fur- 

 row present, but not deeply indented; mucous pores of 

 the head not different from those of the body ; lingual 

 longitudinal furrow present. 



Length 4 inches. Head to cervical fold .45 inch. 



Tail i}4" Diameter of head .31 " 



Body 2y 2 « 



Habitat Illinois and Ohio to Louisiana and Arkansas. 



This species very closely, resembles Plethodon glutin- 

 osus, but is distinguished from it by the arrangement of 

 the teeth in a transverse uninterrupted row arched in 

 front instead of being separated by a wide interval, and 

 also by the tail being very much compressed laterally: 



