EIGENMANN : NEW FISHES PROM WESTERN COLOMBIA 



interorbital .slij^litly convex; frontal roiitaiicl bluiil in rront, about half as 

 long as the i);!rietal ; inonth sli.iiiiti.v more ji'lerior than in H. i/n rinf/ii : 

 maxillary slender, about .(!(; as long as the eye ; width <il' third snl>orbital 

 abont .(!(» diameter of tlie eye; a naked an.i^le below the sutnre between the 

 second and third snb{)rbitals. 



Five or six teeth in the onter series of Ihe i)ren)i;ixillary, the scconfl 

 and fifth of the right side and the second and fonith of the left side with- 

 drawn to form an Incipient middle line; four teeth in the inner sei-ies : 

 maxillary with two broad teeth; mandible vrith seven similar gradujite 

 teeth, the first three much the larger. 



Gill-rakers very slender, 7+^**- 



Scales thin, legnlarly imbricate, with about six striae; anal with a 

 few scales along the base of the anterior rays; caudal naked; lateral line * 

 nearly straight; no axillary scale (?) 



Origin of dorsal fin vei^y little nearer snout than caudal ; the penulti- 

 mate ray more than half the length of the longest, which is about 4.5 in the 

 length; caudal equals length of the head; origin of anal below last dorsal 

 ray; vei trals leachiiig anal, pectorals reaching ventrals. A vertical 

 humeral spot; middle caudal rays dusky. 



5460 C. M. 13155 I. U. M. 



Two sinaller speciuiens 43 and 50 mm. from Rio Orquiza in the same 

 drainage may belong to this species. The scales are 6-39 or 40-5; D. 10; 

 A. 20. Maxillary with three teeth ; denticles of teeth more pointed an;l 

 arranged in a straight line, (the five denticles of the inner series of the 

 premaxillary of the type in a curve) ; outer series of the premaxillary com- 

 posed of two to four teeth. The second behind and to one side of the first 

 one and opposite, the space bet\^'een the first and second tooth of the inner 

 series. 



Bryconamericus deuterodonoides Eig'-nmann, sp. nov. 



5461 C. M. Type, 43 mm. 5462 a-q, C. M. 13156 I. T. M. Paratypes 13. 

 largest 48 mm. Kio Negro, Quebrada at Yillavicenci ). (xonzales. 

 Allied to B. Ji i/i)hcs.yi(s. Dentition in both species very similar to that 



of Deuterdon. 



Head 4.33 ; depth 3,66 ; I), usually 10, rarely 9 ; A. IT or IS, scales 4 

 (rarely 50) -35 to 38-3 to ventrals; eye longer than snout, about equal t<) 

 interorbital, about 3 in head. 



Slender, compressed, dorsal and ventral iirotiles equally arched; pre- 

 veiitral area rounded, vritliout a distinct median series oc scales; predoi-sal 

 aiea rounded with a median series of 12 scales; occipital pr,!';ess a nearly 

 equilateral process about one ninth the distance from its base to the d rsal. 

 bordered on the sides by one or two scales ; frontal fontanel triangular, not 

 half as long as parietal ; snout blunt, lower jaw included, maxillary-pre- 

 maxillary border a regular curve ; maxillary a little longer than premax- 

 illary, about-.75 of eye ; cheek entirely covered by the suborbital which is 

 somewhat pitted ; maxillary usually with three, rarely with four, graduate 

 7-9 pointed teeth, occupying more than half the length of the margin ; pre- 

 maxillary usually with two. rarely with three narrow 3-5 pointed teeth, 

 opposite the spaces between the llrst an.d second and second and third teeth 

 of the inner series; four teeth similar to those of the maxillary but the 



