122 THE AMERICAN CHARACIDAE. 
Base of caudal scaled; ventrals rather nearer tip of last anal ray than to 
snout. 
Dusky, a very faint humeral spot; middle caudal rays black; anal and a 
band from the middle of the anterior dorsal rays to the tips of the last six rays 
with numerous chromatophores. 
7. Kwnopus JAcuNDA (Fowler). 
Bryconamericus jacunda Fow er, Proc. Acad. nat. sci. Phil., 1913, p. 555, fig. 17 (Madeira River, 
about 200 miles east of W. Long. 62° 20’, Brazil). 
This species is known from the type 31 mm. long in the collections of the 
Philadelphia Academy of Natural Sciences. The following description is con- 
densed from Fowler. 
Head 3.5; depth 3; D. 10; A. 26; scales 5-38-4; 12 predorsal scales; 
snout 4 in the head, eye 2.8, interorbital 2.2, maxillary 2.75, depth of caudal 
peduncle 2.5. 
Five large, broad teeth in the inner series of the premaxillary. No maxil- 
lary teeth. Suborbital completely covering cheeks. No interpolated rows of 
scales; anal with a basal series of scales along its whole length. 
Origin of dorsal equidistant from caudal and front of eye; ventrals extend- 
ing past origin of anal, pectorals beyond base of ventrals. 
A vertical humeral spot crosses the third to fifth scales of the lateral line; 
a faint lateral streak. 
This is evidently a young specimen and may belong to Moenkhausia. 
8. Knopus smrtrur (Fowler). 
Bryconamericus smithi Fowuer, Proc. Acad. nat. sci. Phil., 1913, p. 557, fig. 18 (Tributary of the 
Madeira River near Porto Velho, Brazil). 
This species is known from six specimens 24—35 mm. long, in the collec- 
tions of the Philadelphia Academy of Natural Sciences. The description is 
condensed from that of Fowler. 
Head 3.66-4; depth 2.87-3.2; D. 9-10; A. 27-30; scales 6-36 to 39-4; 
12-14 predorsal scales; snout 3.12—3.8 in the head, eye 2.2-2.75, interorbital 
2.42.8, maxillary 2—2.8, depth of caudal peduncle 2.25. 
Six five-pointed teeth in the premaxillary. No maxillary teeth. Su 
