eigenmann: the FRESHWATER FISHES OF BRITISH GUIANA 307 



161. Leporinus granti sp. nov. (Plate XLIII, fig. 3.) 



Type, 144 mm. Maripicru Creek. (Carnegie Museum Catalog of Fishes 

 No. 1851.) 



Cotypes, eight specimens, 108-185 mm. Maripicru Creek. (C. M. Cat. No. 

 1839a; I. U. Cat. No. 12129.) 



These specimens differ from L. megalepis in the shape of the mouth and in the 

 shape of the spots. 



Mouth terminal; lateral spots more elongate, the row from near the upper 

 angle of the gill-opening tending to form a continuous band with the lowermost 

 spots of the sides; four teeth on the side of each jaw; lips much thicker than in L. 

 megalepis; otherwise as in that species. 



This species is named for Mr. William Grant, my most efficient Indian guide 

 on the Potaro, who later made additional collections, which among other new 

 species contained this. 



162. Leporinus alternus sp. nov. 

 "Porchina" of the Wacusi Indians. 



Type, 200 mm. Tukeit. (Carnegie Museum Catalog of Fishes No. 1827.) 

 Cotype, one specimen, 158 mm. Tumatumari. (C. M. Cat. No. 1826.) 

 Cotype, one specimen, 132 mm. Tukeit. (I. TJ. Cat. No. 12117.) 

 Cotypes, twelve specimens, 52-137 mm. Bartica. (C. M. Cat. No. 1828a-c; 



I. U. Cat, No. 12118.) 



Head 4-4.2; depth 4; D. 12; A. 10 or 11; scales 5-38 or 39-4 or 5; eye 1.5- 



1.75 in snout, 3.5-3.75 in head, 1.75 in interorbital. 



Elongate, subterete, the width 1.5 in the depth; preventral area rounded; 



head subcorneal, the mouth subterminal; four graduated, obliquely-pointed teeth 



in each jaw. 



Dorsal rounded, its highest ray about 5 in the length, its origin nearer to tip of 



adipose than to snout; caudal deeply forked, the upper lobe 3.5 in the length; anal 



obliquely truncate, the lobe reaching caudal in the type, sometimes shorter; ventrals 



reaching half-way to anal or shorter, pectorals not half-way to middle of ventrals. 

 Seven cross-bands, the ones over pectorals, below dorsal, in front of anal, and 



at base of caudal, broad and heavy, the others much narrower. 



163. Leporinus fasciatus (Bloch). 

 Salmo fasciatus Bloch, Ausl. Fische, 1795, pi. 379. 



Leporinus fasciatus Cuvier and Valenciennes, Hist. Nat. Poiss., XXII, 1848, 34 

 (Surinam). — Muller and Troschel, in Schomburgk, Reisen, III, 1848, 634 



