THE BATRACHIA OF NORTH AMERICA. 133 



a. The parasplieuoid patches in contact throughout ; vomerine series well separated 

 medially. 

 (S. The tail cyliudric. 



Costal plicic 16 to 19 ; form slender ; tail cylindric ; limhs weak; inner toes ru- 

 dimental ; vomerine series not extending beyond nares externally ; belly 

 browu-marblcd; above plumbeous, or with a red longitudinal band. 



F. cinercus. 



Costal plicte 14; form stout; tail rounded; limbs short, stout; inner digits 

 distinct; vomerine series extending outside of inner nares; black, usually 

 with gray lateral blotches and smaller dorsal spots F. gluUnosus. 



Costal plicailS; form as in F. glutinosus; tail longer than head and body; 

 digits truncate, the internal ones very rudimeutal; vomerine series very 

 oblique, not extending behind choause: black, with yellow spots, which 

 are largest on the head, large on the back, and minute on the sides. 



P. (eneus. 



" Costal plicse 13 ; form moderate, tail cylindric, shorter than head and body; 

 vomerine series very oblique, not extending externally to choanai ; toes 

 more acute; black, with large yellowish spots; smaller on back, want- 

 ing on head" P. flavlpuiwtatus. 



(3(3. The tail compressed. 



Costal plicaj 1.5; form slender; tail well compressed; limbs weak; inner toes 

 rudimeutal ; vomerine series not extending outside of nares ; belly brown- 

 marbled; above, with a red dorsal baud P. intermedius. 



CostaVplicfe 14; form stout ; head large ; limbs robust; inner toes distinct; 

 tail compressed from the base, shorter than length of head and body; 



uniform dark brown above, and lighter brown below P. crassuliis. 



aa. Parasphenoid patches well separated. 

 /?. Tail rounded. 



Costal plicjB 13; form stout; head large, wide; lower jaw wider than upper; 

 muzzle broadly truncate; vomerine teeth approximated medially; tail 

 slender, subcylindric ; black, limbs, belly, and spots of back, orange. 

 P. croceater. 



Costal plica:; 10-11 ; form stout ; head wide ; mamillaries wider than mandible ; 

 muzzle narrowly truncate ; vomerine teeth approximated medially; tail 

 slender, subcylindrical; light brown above; limbs and below yellow. 

 • ,P. oretjonensis. 



PLETHODON CINEREUS Green.* 



Salamandra cinerea, Green, Journ. Acad.,Phila., i, p. 356. 



Plethodon ciitereiis, Tschudi, Batr., p. 92; Cope, Check List N. Amer. Batr. Rept., 



1875, p. 27. 

 Salamandra erythronota, Green, Journ. Ac. Phila., i, p. 356; Holbr., N. A. Herp., v, p. 

 43, PI. 11; De Kay, N. Y. Faun., Rept., p. 75, PI. 16, fig. 38; Wied., Nova Acta 

 Leop.— Carol., xxxii, p, 126. 

 Plethodon eri/thronotiis, Baird, Journ. Ac. Phila. (2;, i, p. 285; Duni. & Bibr., ix, p. 

 86; Cope, Proc. Ac. Phila., 1869, p. 100; Strauch, Salam.,p. 72; Boulenger, 

 Cat. Batr. Grad. Brit. Mus., ed. ir,°1882, p. 57. 

 Amhlystoma crythronotum, Gray, Cat. Batr. Grad. Brit. Mus., ed. i, p. 37. 

 Salamandra agilis, Sager, Peninsular Journal of Medicine, 1858, p. 429. 



This species is amoug the most elongated and slender of American 

 salamanders. It is almost perfectly cylindrical throughout; a very 

 slight amount of compression only being visible towards tiio end of 

 the conical tail, which is longer than the head and body. It is much 



* Plate 19. figs. 4-6. 



