THE GYMNOTID EELS OF TROPICAL AMERICA. 151 
by a membrane, nearer the tip of the snout than to the gill-opening; small teeth 
in both jaws. Scales cycloid, moderately large. 
Via. 14. Sternarchella schotti (Steindachner). 
SPECIES OF STERNARCHELLA. 
a. Depth of head 1.5 to 1.25 in its length; gape moderate, reaching to below posterior nostril... .. . schotti. 
aa. Depth of head equal to its length; gape short, just reaching to below the anterior nostril... . ..balanops. 
22. Sternarchella schotti (Steindachner). 
Sternarchus schotti SrEiNDACHNER, Die Gymnotide, 4, pl. 1, figs. 1 and 2, 1868 
(Barra do Rio Negro); GinrueEr, Cat., VIII, 3, 1870; Corr, Proc. Am. Philos. 
Soc., 1878, 682 (Peruvian Amazon); STEINDACHNER, Flussf. Siidam., II, 42, 
pl. 2, fig. 2, 1881 (Manacapuru); E1GENMANN AND EIGENMANN, Proc. U. 8. 
Nat. Mus., XIV, 1891, 62. 
Sternarchella schotti EtIGENMANN AND Warp, Proc. Wash. Acad. Sci., VII, 1905, 164 
(Amazons); EIGENMANN AND Bran, Proc. U. 8. Nat. Mus., Vol. 31, 665, 
1907 (Lower Amazon); von InERING, Os Peixes do Brazil, Part 1 A, 1907; 
EIGENMANN, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 448 (Amazons). 
3196 C. M., five (all with the caudal region more or less mutilated), length 
estimated 130 mm. more or less. Santarem, Dec. 15, 1909, Haseman. 
Snout 3.1 to 3.4, interorbital 5.25 to 6 in the head; eye 3 to 4 in the snout, 
about 2 in the interorbital, and 10 to 12 in the head; depth of the head in the 
occipital region 1.5 to 1.75 in the length of the head. 
Body and head compressed, both rather elongate; anus between the vertical 
from the eye and that from the posterior nares; dorsal profile almost straight; 
ventral weakly convex in the pectoral region. 
Snout straight or very slightly sloping and rather blunt; mouth moderately 
large; gape curved and short, not reaching beyond the vertical from the posterior 
nares; jaws about equal, the lower appearing longer when the mouth is open, and 
ineluded by the upper on the sides when closed; teeth quite small, in two semi- 
circular rows in each jaw. 
Origin of the anal on or slightly in front of the vertical from the origin of the 
pectorals; pectorals 1.3 to 1.5 in the head. 
