NEW SPECIES OP FISHES FROM COLOMBIA 



233 



about tliree-fourths the length of the eye. Premaxillary with three tr icus[)id 

 in the outer row and five five- to six-pointed teeth in the inner row. Maxillary 

 with four or five minute six-pointed teeth visible only in preparations. Man- 

 dible with four or five six-pointed incisors in each ramus, their tips flaring 

 outwards. Caudal scaled over one-third of the basal lobe. Gill-rakers 7-|-6. 



Origin of dorsal about equidistant from snout and base of middle caudal 

 rays, its height 3.5 in the length. Origin of anal on vertical from last ray of 

 dorsal, fourth to sixth rays elongate forming an anterior lobe, its height about 

 4.7-5 in the length, two large scales overlapping on the anterior margin. 

 Caudal deeply forked, its lobes about equal to the height of the dorsal; 

 pectorals do not reach the ventrals, the latter just overlap on the anal. 



General coloration light olivaceous; operculum, cheeks and snout under- 

 laid with bright silvery. Top of head dusky, no predorsal median line. A 

 broad horizontal lateral stripe from the hind margin of the operculum to the 

 caudal base, here expanded to form an ill-defined oval caudal spot. An in- 

 distinct humeral spot is overlaid by this lateral stripe. A conspicuous band 

 of dark along the entire anal base, outer margin of anal sometimes tipped with 

 this color. Fins, otherwise without color. 



Hyphessobrycon metae Eigenmann and Henn, sp. nov. 



Type, 34 mm. 13421 I. U. M.; paratypes, 66, 16-35 mm. 13422 I. U. M. 

 Barrigona, Rio Meta. Coll., Manuel Gonzales. 



Head 3.5-4, equal to depth at origin of dorsal; D. 11; A. 19-23, 

 -^2^"; 'T'l "5"; "¥"> (the denominator represents the number of individuals) ; scales 

 about 30 in a longitudinal series, 10 in transverse series; pores developed on 6 

 (rarely 7) scales; 9 or 10 scales between occipital and dorsal origin; scales 

 5-6+24-4; eye 2.3-2.6 in head, about equal to interorbital; caudal peduncle 

 about equal to eye and 1.2 in its own depth. 



Slender, compressed; predorsal area rounded with a median series of 9 

 or 10 scales, preventral area rounded with a median interpolated series of 

 small (6) scales. Occipital process 6 in the distance from its base to the 

 dorsal, bordered by 2 or 3 scales, interorbital slightly convex; fontanels very 

 large. First and second suborbitals leaving a high naked margin behind and 

 below. Mouth blunt, terminal; maxillary five-sixths the length of the eye. 

 Premaxillary with three or four narrow tricuspid or broadly conical teeth in 

 the outer row, five three to four-pointed teeth in a second series, an inner 

 series of very small tricuspids or broadly conical teeth immediately behind 

 them. Maxillary with two small tricuspids and one conical tooth, mandible 

 with four strong three to five-pointed incisors in each ramus followed by about 

 seven minute conical or recurved teeth on the sides. Gill rakers 6+5, short 

 and strong. 



Origin of dorsal about equidistant from snout and base of middle caudal 

 rays, its height 3.2 to 3.5 in the length; adipose w^ell developed; height of anal 

 lobe 4 to 5 in length of fish. Caudal deeply forked, its lobes equal, about 

 4.5 in entire length. Anal origin slightly behind vertical from last dorsal 

 ray; pectorals reach beyond ventrals; ventrals to beyond anal origin. 



An obscure dusky, humeral spot, operculum underlaid with a dusky vertical 

 semi-lunar area; top of head deep black produced into a line from occiput to 

 dorsal. A narrow intense lateral stripe from upper margin of operculimi to 

 below last dorsal rays, broadening here to form a heavy broad black band on 

 the caudal peduncle and an oblong caudal spot, the latter produced as a triangle 



