654 GEOLOGICAL SURVEY OF NEW JERSEY. 

 Family PLETHODONTID^. 



American Salamanders. 



HEMIDACTYLIUM, Tschudi. 

 H. scutatum, Schl. [melanosticta, Gibbes.) Four-toed Salamander. 



Ashy brown above ; snout yellow ; silvery below, with dots 

 " like inkspots ; " tail slender, nearly twice as long as body ; 

 head blunt. Rhode Island to Illinois and south. 



PLETHODON, Tschudi. 



P. cinereus, var. erythronotus, Green. Red-backed Salamander. 



Leaden above, with red dorsal band ; belly marbled ; body 

 very slender ; tail rounded ; inner toes rudimentary ; costal folds, 

 16 to 19. 



"About as frequently met with as P. glutinosus. The im- 

 pression that this class of creatures are venomous is erroneous." 



P. cinereus, var. cinereus, Green. Gray Salamander. 



A variety without dorsal red band. 



" Found about rapid streams where there are flat stones, under 

 which it can conceal itself when pursued. The food of these 

 animals is small insects." 

 P. glutinosus, Green. Viscid Salamander. Blue-spotted Salamander. 



Black, with gray lateral blotches and smaller dorsal spots ; 

 body stout; tail rounded; inner toes well develojjed ; like the 

 preceding, spends much time out of water. 



" Not unfrequently met with in the hilly sections of the State. 

 Very moist land and the bottoms of brooks where it is generally 

 met with." 



SPELERPES, Raf. 



S. bilineatus, Green. Two-striped Salamander. Stripe-backed Sala- 

 mander. 



Yellow, with a dark line along each side of back ; belly 

 unspotted ; tail not keeled. Costal folds, 14; size small. 



" Not abundant. More numerous in the northern hilly sections 

 of the State. This and the following are very scarce in the 

 central counties." 



