EIGENMANN: the freshwater pishes of BRITISH GUIANA 289 



reaching considerably beyond ti}) of last, but not to the caudal fulcra. Base of 

 dorsal reaching half-way to middle of adipose, about 7 in the length. 



A broad band from tip of snout to base of middle caudal rays, bordered by a 

 light streak above; back brown, with darker cross-shades; a small spot just above 

 base of first ventral ray; a dark spot or streak on the chin, another anterior to the 

 anal; a dark spot on either side of base of anal, ventral surface otherwise plain. 

 A dark spot anterior to the dorsal and one in front of the adipose fin. Fins 

 without definite markings. 



146. Characidium vintoni Eigenmann. (Plate XXXVIII, figs. 1, 2.) 



"Tunatruic." 



Characidium vintoni Eigenmann, Ann. Carnegie Mus., VI, 1909, 36; Repts. Prince- 

 ton Univ. Exp. Patagonia, III, 1910, 428. 



Type, 76 mm. Shrimp Creek, where the path from Tukeit to the Kaieteur 

 crosses it. (Carnegie Museum Catalogue of Fishes No. 1142.) 



Cotypes, fifty-two specimens, 53-82 mm. Shrimp Creek. (C. M. Cat. No. 

 1143a-j; I. U. Cat. No. 11674.) 



Named for Mrs. C. Vinton, one of the few ladies who have visited the habitat 

 of this species. 



Resembling Hadropterys. 



Head 4-4.25; depth 5.4-6; D. 11; A. 8; scales 4-37-2^, nine median scales 

 anterior to dorsal; eye 1.66 in the snout, 4.6 in the head, about 1 in the interorbital ; 

 bofty interorbital equal to half the diameter of eye ; teeth obscurely three-pointed. 



Snout long, pointed. Pectorals with the tips of the outer rays thickened, not 

 reaching ventrals; ventrals not to anal; highest anal ray equal to length of caudal 

 peduncle, not reaching the fulcra of the caudal ; third dorsal ray reaching tip of last; 

 base of dorsal equal to one-half its distance from the adipose fin, about 8 in the 

 length; tip of third dorsal ray reaching much beyond tip of the last ray. 



A conspicuous band from the tip of the snout to the middle of the caudal, 

 bordered above by an interrupted yellowish liand about half its width; a dark band 

 along the middle of the back, another between it and the lateral band; a dark streak 

 parallel to the lateral band below it in front of the caudal peduncle. About eight 

 bands across the back to the lateral band, sometimes continued below the lateral 

 band directly, or with a shift backward or forward. Lower surface silvery; opercle, 

 angle of preopcrcle, and a band below the eye sometimes dark; axil and spot above 

 origin of ventrals and a streak along base of anal dark; lower surface of chin pale 

 or dark. All these markings sometimes obscured by increased pigmentation. 



