180 THE AMERICAN CHARACIDAE. 
Specimens examined. 
. Number of Size 
Catalogue number specimens in mm. Locality Collector 
1189 C. Type 1 19 Konawaruk Eigenmann 
11767 I. Paratypes 2 21-25 Konawaruk Eigenmann 
3075 C. 1 25 Demerara river Eigenmann 
Head 3.5; depth 3.8; D.11; A. 26 to 28; scales 5-32 to 34-3; eye 2.5 in 
head; interorbital less than the eye, about 3 in the head. 
Compressed; depth of head at base of the occipital process 1.25 in the 
greatest depth. Preventral region rounded, with complete median series of 10 
to 11 seales. Predorsal region rounded, with complete median series of 9 scales. 
Occipital process about 5 in the distance from its base to the dorsal, bor- 
dered by two scales. Interorbital slightly convex. Frontal fontanel triangular, 
narrower than the parietal, three fourths the length of the parietal fontanel 
without the occipital groove. Second suborbital leaving narrow naked margins 
behind and below, the lower margin being a mere line. Snout short, 1.5 in 
the length of the eye. Mouth small. Maxillary less than the eye, about 3 
in the head; mandible equal to the eye, about 2.5 in the head. Premaxillary 
with one or two narrow tricuspid teeth in the outer row and five 3- to 5- 
pointed teeth in the inner row. Maxillary with two or three broad 3- to 
5-pointed teeth. Dentary with four or five 3- to 5-pointed teeth in a grad- 
uated series, followed by several minute conical or 3-pointed teeth on the sides. 
Anal sheath short, of 5 scales covering the base of the first 8 or 9 rays. 
Lateral line with pores developed on 7 scales. 
Origin of the dorsals equidistant from the snout and caudal; penultimate 
ray little more than one third the longest which is 3.8 in the length. Origin 
of the anal on the vertical from the fourth dorsal ray. Anal emarginate, the 
longest ray 2 in the length of the base. Ventrals on the vertical from the first 
or second scales in front of the dorsal. Ventrals reaching the third anal ray; 
pectorals reaching just beyond the base of the ventrals. 
Humeral spot small, black, vertically elongate. No caudal spot. Lateral 
stripe extremely narrow and line-like, interrupted and very faint. Scales of 
the back and upper half of the sides outlined with dusky. Dorsal with an 
intense black bar on the outer half of the anterior six or seven rays; the tips of 
the second, third, and fourth rays and a streak directly below the black bar, 
white. Posterior half of anal rays with blackish tips. Caudal, anal, ventrals, 
and pectorals a little dusky. 
