NORTHWESTERN SOUTH AMERICA. 687 



ing the fourth ray ; the last rays reaching the caudal ; caudal nar- 

 rowly rounded, equal to the length of the head; tip of anal just 

 reaching the caudal. 



Ten narrow cross lines on the body, the posterior ones Y-shaped, 

 the upper branches of the Y in contact ; a small dark spot at the 

 base of the caudal ; two dark lines from the eye forward to the edge 

 of the preorbital ; an oblique black band from the first to the second 

 dorsal spine in the second or third fourth of their height ; dorsal 

 faintly barred; upper three fifths of the caudal conspicuously barred 

 by lines that become more wavy and less distinct toward the tip of 

 the fin ; lower portion of caudal plain. 



Easily disinguished from the other species of the genus by its 

 narrow cross lines. In the smaller specimens the teeth of the lower 

 jaw are less differentiated. The outer row of sixteen to twenty 

 teeth are slightly larger at the outer edge of the row, the inner row 

 consists of ten teeth in a series nearly parallel to the proximal half 

 of the outer row. 



Characid^. 



17. Brycon ecuadoriensis Eigenmann & Henn, spec. nov. 



13470 I., type, 245 mm. from tip of snout to end of lower caudal 

 lobe, 204 to end of scales on middle of caudal. Rio Barranca 

 Alta from Naranjito, Ecuador. Henn. 



Head 3.6; depth 3.3 ; D. 11 ; A. HI, 29.5; scales 9-56-4 to ven- 

 trals ; eye about 4.1 ; base of anal equals length of head. 



Preventral area rounded, postventral area compressed, not 

 keeled ; predorsal area very bluntly keeled ; occipital process about 

 8 in the length from its base to the caudal ; interorbital moderately 

 convex ; snout rounded ; frontal fontanel about one third as long 

 as the parietal ; cheeks with an exceedingly narrow naked margin ; 

 premaxillary with 6 teeth in the outer series of one side, 7 in the 

 other side ; five teeth in the inner series ; three teeth in a row from 

 the second tooth of the outer to the third of the inner series, a tooth 

 between the first of the outer and the second of the inner series ; 14 

 teeth in the maxillary to near its tip, the anterior ones which form 

 a continuous series with the inner series of the premaxillary largest ; 



