EIGEXMAXX : XEW FISHES FROM WESTERX COLOMBIA 



9 



5478 'iVpe. about '.'u mm. Caeeres. May 2:). 1000. Ilascmaii. 



ResemhliiiL:" H i!i(Oii(Hiicricii>< dlhiinms hut wWh a loimcr ma\illai-y. 



Head 4.:;: deiitii 3.S ; I). 4(J : A. 27; scales o-4{)-:i~,: eye 2.7: inter- 

 orbital 2..">. 



Compressed witli less than lialf of the de])tli: iircveiitral area rounded, 

 with a median scrips twelve scales; prv'doisal area rdiuided with a 

 median scries of hfteen scales. 



Occipital process about 1/10 of the distance from its l)ase to the df)rsa]. 

 bordered by two scales on the sides; interorbital slightly convex; frontal 

 fontanel a little shorter than the parietal ; snout blunt, mouth small, the 

 lower jaw included, maxillary two-thirds as long as eye; second suboibital 

 co^-ering the entire cheek ; five teeth on one side, six on the other in the 

 original front series, the second and third withdrawn, four teeth in the 

 inner series ; four teeth on one maxillary, five on the other ; three or four 

 large teeth in fr.'irt on each mandible, several much smaller, similar and 

 graduate teeth on the sides. 



Scales as in ai'gentcus. 



Origin of dorsal a little nearer end of lateral line than the snout : 

 origin of anal on the vertical from the prst dorsal ray ; ve;Mrals reaching 

 anal pectorals to second scale behind origin of ventrals. 



Silvery, a very faint vertical humeral spot crossing the third and 

 fourth scale of the lateral line. 



Hyphessobrycon ecuadoriensis Eigenmann and Henn sp. nov. 



Type. :n mm. .1417a-x C. ^l. 1810.1. jiaratypes. many hundreds. 

 Forest pool near Vinces. Ecuador. Arthur Henn. 



Allied to i/UiiaiiK iisi-s from which specimens of equal size differ in the 

 wider second suborbital, the broader predorsal area, the snniller eye. the 

 shorter anal, the color, etc. 



Head 8.r, ; depth 2.6-3: depth of caudal pedimcle 7-S : D. 11 : A. 22-24. 

 Scales alH)ut 30 in a longitudinal series, about 11 in a cross series, but few 

 scales ^^■ith pores : Eye 3 in head, greater than interorbital. 



Compressed, rather deep, caudal peduncle slender; predorsal area 

 rounded, with a median series of about 11 scales; ]U'eventral area lounded. 

 without distinct median series of scales: skull smooth, fontanels very 

 large; second suborbital with a strongly convex margin, leavinu" I)ut a 

 narrow naked margin : mouth oblique, terminal, the maxillary short, but 

 two-thirds the length of the eye. Premaxillary with 0 or S teeth, the 

 lateral one conic the rest all tricuspid, a smaller tricuspid tooth in front of 

 the space between the second and third of the inner series, occasionally 

 between them and forming a continuous series with them. ^Maxillary with 

 0-3 minute teeth : mandible with 10 or more graduate teeth of which the 

 anterior ones are tricuspid the rest conical. Gill rakers well developed o:i 

 both arches. 



Origin of dorsal a little behind the middle, its height 4 in the length, 

 adipose Avell developed; height of ai'al lt)be l.-l in the length, caudal lobes 

 3; origin of anal under middle of dorsal, ventrals reaching anal or further, 

 pectorals to or beyond origin of ventrals. Lateral line developed en tive 

 or six scales. 



