162 THE AMERICAN CHARACIDAE. 
11 + 2, (the italicized numerals represent scales with pores). Another has 
17+6+2+4+4+2+483. A specimen of 41 mm. has the lateral line 17 + 
14 + 2 on the left side and /6 + 18 + 1 on the right side. Of others, one, 
34 mm. has respectively 24 + 8 + 3 and 20 +8 +7; one, 37 mm. has 16 + 19 
and 1/6 + 18; and one, 42 mm., has 24 +5 +5 on the left and 24+7+3 
on the right side. The lateral line is developed on the seventh transverse series 
of scales. Scales in the type are 6-/6 + 18 + 1-4. Eye 2.6 in head, about 
equal to or slightly greater than the interorbital. 
Compressed, rather deep, caudal peduncle slender; predorsal area arched 
or rounded with a variable median dorsal series of from 9 to 12 (usually 10) 
scales; preventral area rounded, with an ill-defined median series of about 12 
large scales. Occipital process about 5 in the distance from its base to the 
dorsal, bordered by three seales. Skull convex; fontanels moderately large; 
second suborbital in contact with the preopercle behind. 
Mouth terminal; snout blunt, about one half the eye; maxillary short, 
about three fourths the length of the eye. Premaxillary with three tricuspid 
teeth in the outer row and five 5- to 6-pointed teeth in the inner row. Maxillary 
with four or five minute, 6-pointed teeth, visible only in preparations. Man- 
dible with four or five 6-pointed incisors in each ramus, their tips flaring out- 
wards. 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 dark 
band along the entire anal base, outer margin of anal sometimes dark tipped. 
Fins otherwise without color. 
