152 Journal of the Mitchell Society [. December 
13. *Upper jaw bearing- on its margin, immediately below 
each nostril, a prominent tubercule. Color light choc- 
olate brown, spotted with brown. Underparts unmarked. 
Daniel’s Salamander ( S . danielsi). 
Upper jaw bearing no such tubercle. 14. 
14. Color red of varying shades spotted above or below 
with black or both. Red Triton ( S . ruber). 
Color yellowish or purplish brown above, irregularly 
blotched with gray. Purple Salamander (S. porphy- 
riticus). 
15. Head with three longitudinal grooves. Underparts yel- 
low or red below with black dots. 16. 
Head without longitudinal grooves. 17. 
16. Each side with a row of red spots, each spot surrounded by 
a black ring. American Newt {Diemyctylus viridescens). j 
Each side with a series of black' bordered red lines, 
replacing the black ringed spots. Wilmington Newt | 
( D . v. vittatus). 
17. Salamanders with rather long toes on all four feet, the 
outer and inner ones well developed. Tail compressed. 
(Genus Ambystoma). 18. 
Salamanders with shorter toes, the outer or inner toes ! 
or both usually reduced in size or rudimentary. Tail 
not much compressed. 26. 
18. Costal grooves 10. Form short and stout. Color black- 
ish brown with gray, lichen like markings. Mole Sala- 
mander (A. talpoideum ), 
Costal grooves more than 10. 19. 
19. Costal grooves usually 11. 20. 
Costal grooves 14. 23. 
*Similar tubercles occur more , or less frequently in Manculus quadridi- 
gitaus, Sp. bilineatus, Sp. guttolineatus and regularly in Sp. maculicauda. j 
