THE BATRACHIA OF NORTH AMERICA. 23 



NECTURUS Eaflnesque. 



De Blaiuville's Journal Physique, lxxxviii, 1819, p. 417 ; Wagl. Nat. Syst. Aiii- 

 phib., 1830, p. 210; Gray, Catal. Biit. Mas., cd. i, p. G'3 ; Boulenger, Catal. 

 Bat. Grad. Brit. Mus., ed. ii, 1882, p. 83. 

 Phanerohranchus, part., Leuckart, Isis, 1821, ]}. 260. Fitziug., Neue. Classif. Rept., 



p. 68, 18-26. 

 Menoiranchus, Harlan, Ann. Lye. N. Y., i, 1825, p. 221; Tscbudi, Batr., p. 97; Dum. 

 & Bibr., IX, p. 183. 



External gills i)ersistent. Fingers and toes, four; voraeropiilatine 

 teetli in a single series. Eyes exposed. 



This genus is distributed throughout the eastern district of North 

 America only, where it is represented by two species. These are distin- 

 guished among other characters by the following: 



Muzzle longer, more depressed ; brauchire shorter; teeth, preaiaxillaries 11-15 ; vora- 

 erines 12-lB; brown, darker spotted; larger N. maculatiis. 



Muzzle shorter, less depressed; brauchije longer ;. teeth; premaxillaries C-8 ; voni 

 erines 8-9; pale, unspotted; smaller N. 2nincta1us. 



NECTURUS MACULATUS Raf. 



Plates i-iii. 



NecturKS maculatus, Rafin., 1. c; Holbr., N. A. Herp., V, p. Ill, j)l. 37; Bol^lenger, Cat. 



Batr. Grad. Brit. Mus., ed. ii, 1832, p. 81. 

 Triton lateralis, Say, in Long's Exped. Rocky Mts., i, p. 5. 

 I'hanerobranchus tetradaclijJus, Leuckart, 1. c. 

 Menohranclius lateralis, Harlan,!, c; Tschudi, Batr., p. 97; Holbr., 1. c, p.. 115, pi. 38; 



Dekay, N. Y. Faun., Kept., p. 87, pi. 18, f. 45 ; Dum. & Bibr., p. 183 ; Wied, Nova 



Acta Leop. -Carol xxxii, p. 138, pi. 7, f. 1. 

 Menohranchus ictradacfylus, Harlan, Jouru. Ac. Phla.,iv, p. 324 ; Gray, Ann. Philos., 



X, 1825, p. 21C. 

 Meiwhranchiis sayi, Gray, 1. c. 



Nectiirus maculosus. Gray, Cat. Batr. Grad. Brit. Mus.,ed. i, p. 66. 

 Proteus maculatus, Barnes, Amer. Journ., xi, p. 258. 

 Menohranclius lacejiedii, Gray, in Griff. A. K.,ix, p. 108. 

 Phavcrohranclnis laeepedii, Fitz.,1. c. 

 Mccturus lateralis, Wagl.,]. c. 

 Siredon lujcmalis Kueeland Proceeds. Boston Soc. Nat. Hist., vol. vi, p. 152, 1856; p. 



218 (1857). 

 Menohranclius liijemalis Kueeland, 1. c, p. 280, 18,57. 



In this species the body is only moderately elongate, measuring, with 

 the head, four and a half to five times the greatest width of the latter. 

 The body is depressed, though not so much so as that of tho known 

 species of Cryptobrauchus. The section of the tail at the base is a ver- 

 tical oval ; beyond this point it is more compressed, so that the distal 

 half is flat and oar-like, with a wide dermal border above and below. 

 The length of the tail varies somewhat. It usually enters twice into the 

 length from its base to a point posterior to the eye, but sometimes this 

 point is anterior to the eye, and even rarely as far as the end of the 

 muzzle. 



The head is a flat oval, and the muzzle is flat, rather short, and some- 

 what truncate in outline. The eye is situated anterior to the middle of 

 the head and is quite small, its longer diameter entering the interorbital 



