eigenmann: the FRESHWATER FISHES OF BRITISH GUIANA 339 



contact, with the preopercular limb. Third anal ray not extending to the base of the last ray. 

 Maxillary with five to seven very narrow conical and tricuspid teeth. D. 11; A. 17 to 20; scales 



6-33 to 34-4 eos. 



ax. No caudal spot ; humeral spot vertically elongate, not continued backwards ; a black line along the middle 

 of the sides; mouth moderate, maxillary with three broad four- to seven-pointed teeth. D. 11 ; 

 A. 26-31 ; scales 6-33-4 stictus. 



197. Hyphessobrycon minor Durbin. (Plate XLIX, fig. 5.) 



Hyphessobrycon minor Durbin, Ann. Carnegie Mus., VI, 1909, 65. — Eigenmann, 



Repts. Princeton Univ. Exp. Patagonia, III, 1910, 436. 



Type, 19 mm. Konawaruk. (Carnegie Museum Catalog of Fishes No. 

 1189.) 



Cotypes, two specimens, 21-25 mm. Konawaruk. (I. TJ. Cat. No. 11767.) 



Head 3.5; depth 3.8; D. 11 ; A. 26 to 28; scales 5-32 to 34-3; eye 2.5 in the head; 

 interorbital less than the eye, about 3 in the head. 



Humeral spot small, black, vertically elongate. No caudal spot. Lateral 

 stripe extremely narrow and line-like, interrupted, and very faint. Scales of the 

 back and upper half of the sides outlined with dusky. Dorsal with an intense 

 black bar on the outer half of the anterior six or seven rays. The tips of the second, 

 third, and fourth rays, and a streak directly below the black bar, white. Last half 

 of anal rays with blackish tips. Caudal, anal, ventrals, and pectorals a little dusky. 



198. Hyphessobrycon rosaceus Durbin. (Plate L, fig. 1.) 



Hyphessobrycon rosaceus Durbin, Ann. Carnegie Mus., VI, 1909, 67. — Eigenmann, 



Repts. Princeton Univ. Exp. Patagonia, III, 1910, 436. 



Type, 35 mm. Gluck Island. (Carnegie Museum Catalog of Fishes No. 

 1190.) 



Cotypes, ,twenty-five specimens, 19-38 mm. Gluck Island. (C. M. Cat. 

 No. 1191«-e; I. U. Cat, No. 11768.) 



Cotype, one specimen, 34 mm. Rockstone. (C. M. Cat, No. 1192a.) 



Head 3.33-3.66; depth 2.75; D. 11; A. 26 or 27; scales 5-31 to 33-3; eye 2.5 

 in the head; interorbital almost equal to the eye, 2.6 in the head. 



Humeral and caudal spots lacking. Scales of the back outlined with dusky. 

 The entire sides (except over the body cavity) with scattered chromatophores, 

 which are a little thicker on the caudal peduncle and on the third and fourth scales 

 of the lateral line and the three scales above them. The chromatophores are 

 thinner over a small vertically elongate area immediately behind the humeral 

 area just described. The lateral stripe is very slender, extending entirely to the 



