THE GYMNOTID EELS OF TROPICAL AMERICA. 133 



Rharnphichthys {Brachyrhamphichthys) mirabilis Steindachner, I. c, pi. IX, 

 figs, i, and ia. 



3165 C. M., nine, 120-140 mm. Santarem, Dec. 15, 1909, Haseman. 

 Six, 110-130 mm. Kumaka, Sept. 12, 1910, Ellis. 



1756 C. M., 12614 I. U. M., three, 75-192 mm. Kumaka, Eigenmann. 



1757 C. M., one (broken, length estimated 150 mm.). Wismar, Eigenmann. 



Head 8.25 to 8.5, depth 5.25 to 5.5 in the length to, the end of the anal; anal 

 rays 160, 164, 175 (Kumaka); snout 3.3 to 3.7, interorbital 3, or a little more, in 

 the head; eye 1.5 to 1.75 in the snout, 1.7 to 2 in the interorbital, and about 5 in 



the head. 



Compressed back of the head, which is round and chubby; width of the head 

 about 2.5, its depth in the occipital region 1.6 to 2 in the greatest depth; anus on 

 or a little behind the vertical from the eye; dorsal profile convex; ventral profile 

 abruptly convex to origin of the anal, beyond this very slightly convex. 



Snout heavy, blunt; mouth moderate; gape short, not reaching to below the 

 eyes; jaws equal; eyes small; a cylindrical filament about twice the length of the 

 snout, having its origin near the pectoral, lying in a groove on each side of the mental 

 region, both filaments united in median line at the edge of lower lip. 



Caudal peduncle not over 2.8 in the total length; pectorals 1 to 1.2 in the 

 head; origin of the anal below that of the pectorals or a little caudad. 



Ground-color of preserved specimens dark golden brown, a series of twelve to 

 twenty irregular bands of dark red-brown, starting from the median dorsal line and 

 crossing both the body and the anal fin (these bands are more or less confluent in 

 the region of the lateral line) ; small golden brown spots on the median dorsal line at 

 the junction of the dark bands from the sides; top and sides of the head almost 

 black, with numerous pale yellow streaks crossing them; cheeks lighter ; pectorals 

 mottled with black; anal with numerous brown spots in the yellow interspaces 

 between the brown cross-bands. 



This species which, in a general way, resembles the young of Gymnotus carapo 

 is sometimes called by the same name, "Warradiera." It is also known by the 

 name "Corybu." It inhabits small streams in densely wooded places and is 

 occasionally used as food cooked with rice by the Indians. 



Distribution: Barra do Rio Negro, British Guiana, and Lower Amazon. 



VI. Hypopomus Gill. 



Hypopomus Gill, Proc. Acad. Nat. Sci. Phila., 1864, 152. 

 Brachyrhamphichthys Gunther, Cat., VIII, 6, 1870, artedi. 



Type, Rharnphichthys miilleri Kaup. 



With fontanels; no caudal; snout short; size small; body elongate and rather 

 cylindrical, tapering posterioriy, maximum depth and thickness back of the pec- 

 torals; head small, chubby, and conical; mouth and gape small; teeth wanting; eyes 



