302 MEMOIRS OF THE CARNEGIE MUSEUM 



Two specimens, 128-131 mm. Gluck Island. (C. M. Cat. No. 1822; I. U. 

 Cat. No. 12113.) 



Twenty-eight specimens, 66-203 mm. to end of middle caudal rays. Crab 

 Falls. (C. M. Cat, No. 1823a-e; I. U. Cat. No. 12114.) 



Eleven specimens, 45-191 mm. Bartica. (C. M. Cat. No. 1824a-c; I. U. 

 Cat. No. 12115.) 



Head 4-4.75; depth 4.5-5; D. 12-13; A. 10 or 11. Scales 5 or 6-41 or 42-4; 

 eye 1.5-1.75 in snout, 3.6-4 in head, 1.2-1.66 in interorbital. 



Elongate, subterete, little compressed, head subcorneal; back little raised, the 

 profile with a scarcely perceptible depression over the eyes. Snout blunt, the 

 mouth inferior, four teeth on each side of each jaw. 



Dorsal 5.3-6 in the length, its origin equidistant from tip of snout and end of 

 base of adipose, or a little farther back; margin of dorsal rounded; adipose fin 

 well-developed; caudal forked, the upper lobe longer, 4.3 in the length; anal 

 rounded or truncate, the longer rays always reaching beyond the tips of the shorter 

 rays, sometimes to the lower caudal fulcra; ventrals reaching a little more than 

 half-way to the vent; pectorals half-way to second third of ventrals. 



Young with twelve dusky bars across the back; an intense spot behind the 

 middle of the opercle, three similar but successively fainter spots following it; a 

 median dark stripe from below the middle of the dorsal to the caudal, widest and 

 most intense in front. All the markings (with the exception of the lateral stripe) 

 fading with age. Center of adipose orange in life. 



159. Leporinus friderici (Bloch). (Plate XLIII, fig. 4.) 



Salmo friderici Bloch, Ausl. Fische, VIII, 1795, 78, pi. 378 (Surinam). — Bloch and 

 Schneider, Syst. Ichth., 1801, 403. 



Leporinus friderici Muller and Troschel, Horse Ichth., 1, 1845, 11 ; in Schomburgk, 

 Reisen, III, 1848, 634 (Pomeroon). — Cuvier and Valenciennes, Hist. Nat, 

 Poiss., XXII, 1859, 25 (Essequibo; Surinam; San Francisco; La Plata).— 

 Kner, "Familie der Characinen," i, 1859, 34 (Rio Branco). — Gunther, Cata- 

 logue, V, 1864, 306 (Essequibo; River Cupai); Proc. Zool. Soc. London, 1868, 

 244 (Xeberos). — Steindachner, " Siisswasserfische d. Slidostlichcn Brasilien," 

 ii, 1875, 13 (Bahia; S. Goncallo; Rio Para; Porto do Moz; Parahyba; Rio Branco; 

 Manacapuru; Jatuarana; Essequibo). — Cope, Proc. Am. Philos. Soc, XVII, 

 1878, 690 (Peruvian Amazon). — Eigenmann and Eigenmann, Proc. U. S. 

 Nat. Mus., XIV, 1891, 51.— Perugia, Ann. Mus. Genova, (2), XVIII, 1897, 

 25 (Alto Beni).— Boulenger, Boll. Mus. Torino, XIII, 1898, 4 (Rio Vinces); 



