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INDIANA UNIVERSITY STUDIES 



long as the eye ; second suborbital leaving an exceedingly narrow naked 

 margin I)ebind: iiremaxillary \vith five teeth in the anterior series, the 

 first, third and fifth in front of the lower lip ; three teeth in the maxillary ; 

 four large teetli in the mandible ; minute ones on the sides. 



Scales arranged with striking regularity, their margins well marked; 

 caudal naked, without glandular scale; axillary scale well developed. A 

 series of scales along the base of the anal rays. Origin of dorsal equi- 

 distant from tip of snout and end of last scale of the lateral line, its 

 highest ray a little less than the head in length, origin of anal equidistant 

 with middle of dorsal from the tip of the snout ; ventrals reaching the 

 anal, pectorals slightly beyond tip of axillary scale. 



Iridescent, nearly evenly covered with chromatopliores ; a black spot, 

 p-ot ocellated with lighter, at the end of the caudal peduncle, not extend- 

 ing on the middle rays ; a faint humeral spot crossing the third scale of 

 the lateral line, a fainter dusky liand above the seventh to the tenth. 



This species is evidently closely allied to scopifcrus which has frosted, 

 papeiw scales, a distinct silvery band and in which there are no chromato- 

 pliores in front and below the caudal spot. 



8. Bryconamericus scopiferus sp. nov. 



Type. DU mm. CM. Xo. .oOl'O. Istmina. Rio San Juan. 

 Paratypes, SS, .38-105 mm. Istmina. CM. Xo. 5027 a-z ; I.U.M. Xo. 

 12793. 



Paratypes, 120, largest 108 mm. Cisnero. Rio Dagua. CM. Xo. 5028 

 a-z; I.U.M. Xo. 12794. 



Paratypes, 29. .50-108 mm. Cordova, Rio Dagua. CM. Xo. 5029 a-d ; 

 I.U.M. Xo. 12792. 



Head 4-4.6; depth 2.. 5-2. 9 : D. 11: A. 29-.32 ; scales 6 (or 7) -39 or 40- 

 5 or 6, rarely 38 or 42 scales. Eye 2.4-2,7 in the head, equal or very little 

 less than the interorbital ; base of anal 3 in the length. 



Compressed, more or less elongate ; dorsal and ventral profiles equally 

 curved; preventral area rounded, without a distinct median series of 

 scales; predorsal area bluntly keeled, with a median series of eleven 

 scales. Occipital process one-fifth or one-sixth of the distance from its 

 base to the dorsal, bordered by two or three scales on each side; skull 

 smooth, very little convex ; frontal fontanel but little shorter than the 

 parietal without the occipital groove: snout short, jaws nearly equal; 

 maxillary-premaxillary border angulated. equal to or very little longer 

 than eye. the maxillary about three-fourths the length of the eye ; cheek, 

 except a narrow strip behind, entirely covered by the second suborbital, 

 which at its widest point is about two-thirds as wide as the eye. Four 

 or five teeth in the outer row of the premaxillary, four in the inner ; two 

 or three small teeth on the maxillary; four graduated teeth on the mandi- 

 ble and a few smaller ones on the sides. 



Dorsal equidistant from snout and caudal or a little nearer the snout, 

 pointed, its high anterior rays longer than the head ; adipose fin well devel- 

 oped ; caudal lobes longer than the highest dorsal rays ; anal emarginate. 

 its origin about on the vertical from the last dorsal ray ; ventrals not 

 reaching the pectorals, the latter to or nearly to the ventrals. 



