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. 



Fig. 14. Sternarchella schotli {Stemda,dmcr) . 



Species op Sternarchella. 



a. Dcjith of head 1.5 to 1.2.5 in its IciiKth; gape moderate, reaching to below po.sterior nostril schotti. 



aa. Depth of head equal to its length; gape short, just reaching to below the anterior nostril balaenops. 



22. Sternarchella schotti (Steindachner). 



Sternarchus schotti Steindachner, Die Gymnotidse, 4, pi. 1, figs. 1 and 2, 1868 

 (Barra do Rio Negro) ; GtJNTHER, Cat., VIII, 3, 1870; Cope, Proc. Am. Philos. 

 Soc, 1878, 682 (Peruvian Amazon); Steindachner, Flussf. Siidam., II, 42, 

 pi. 2, fig. 2, 1881 (Manacapuru) ; Eigenmann and Eigenmann, Proc. U. S. 

 Nat. Mas., XIV, 1891, 62. 



Sternarchella schotti Eigenmann and Ward, Proc. Wash. Acad. Sci., VII, 1905, 164 

 (Amazons); Eigenmann and Bean, Proc. U. S. Nat. Mus., Vol. 31, 665, 

 1907 (Lower Amazon); von Ihering, 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 

 included 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. 



