﻿ICHTHYOLOGICAL RECONNAISSANCE OF COLOMBIA 



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a regular series of about eleven scales ; postventral area rounded, with 

 three or four scales ; predorsal area keeled, with a distinct median series 

 of nine or ten scales ; occipital process about 5 in the length from its base 

 to the dorsal, bordered by three or four pairs of scales ; skull smooth, 

 com ex ; parietal fontanel without the groove about one and a half times 

 as long as the frontal fontanel. Second suborbital leaving a naked area 

 one-fifth to one-half of its own width around its entire distal margin ; 

 maxillary-premaxillary border angulated, equal to a full diameter of the 

 eye; the mouth terminal, the longitudinal extent of the premaxillary very 

 short. Three or four teeth in the outer row of the premaxillary, five in 

 the inner, the two rows parallel ; a broad tipped, multipointed tooth on the 

 maxillary; five rather small, five-pointed graduate teetli in the mandible 

 in front, none on the sides. 

 Gill-rakers 7 + 12. 



Origin of dorsal about equidistant from snout and base of upper 

 caudal lobe; its highest (second and third) rays about twice as high as 

 the antepenultimate, the fin ]iointed, the highest ray a little longer than 

 head ; caudal lobes about 3 in the length ; origin of anal behind the vertical 

 from the last dorsal ray ; anal emarginate its base about 3.5 in the length ; 

 ventral usually not reaching anal, its origin equidistant from snout with 

 the second or third scale in front of the dorsal, pectorals sometimes fall- 

 ing a little short of or extending a little beyond the origin of the ventrals. 



Scales very regular, no interpolated rows of scales below the lateral 

 line; the third vow below the lateral line runs to the end of the anal, 

 the fourth to the middle of the anal, the fifth to the sides of the first few 

 anal rays; lateral line nearly straight; caudal lobes naked; anal with a 

 sheath of a single row of scales); a large axillary scale; lateral line! 

 variable.^ 



Silvery, a silvery lateral band; a faint humeral spot crosses the 

 third scale of the lateral line; a large conspicuous triangular caudal spot 

 extending on the bases of the middle caudal rays, not to their middle. 

 Caudal lobes with cherry spots at the base becoming yellow toAvard the 

 tip. 



Hyphessobrycon poecilioides pp. n* v. 



Type, 53 mm. 9 Cali. CM. No. 5091. 



Paratypes, 50, largest 69 mm. CM. No. 5002 a-o ; I.U.M. No. 12850. 



Head 3.66-3.75; depth 2.60 9 -Sd'iD. 11; A. 16-18; scales 36 in a longi- 

 tudinal series, 12 series ; usually about 9 scales with pores, rarely as many 

 as 16; eye 4 in head, 1.66-2 in interorbital, equal to snout; depth of caudal 

 peduncle 2.66-2.9 in the greatest depth. 



Cyprinodontoid. Ventral surfaces rounded, the scales rather small, no 

 distinct median series ; about 12 scales in front of the dorsal, in a nearly 

 regular series ; interorbital but slightly convex, mouth very small, the 

 maxillary very oblique, usually not quite equal to the eye; maxillary- 

 premaxillary border 3 in the head ; second suborbital sometimes covering 

 the entire cheek, usually leaving a naked border behind and a naked tri- 



* An xamination of ths spscimsns from Quibdo, on which thi above d3scription is bas:d, thows 

 eighteen with a complete lateral Ims, eleven with the lin? comphti on one sidi and not on the other, 

 and seventy -six with the line incomplete on both sides. 



