CHARACINIDAE FROM VENEZUELA—SCHULTZ 271 
Body elongate, head rounded, body a little compressed, forward 
part of head a little depressed, interorbital considerably convex; eyes 
latecal, seen as well from below as from above; anterior and posterior 
nostrils separated by a small isthmus of skin, the anterior nostril 
tubular; snout rounded, mouth small, terminal; teeth broad, tri- 
cuspid incisors in a single row of 8 in upper and 8 in the lower jaw, none 
of which is produced forward; premaxillaries not protractile; eye with 
adipose eyelids wider anteriorly; gill membranes joined to isthmus, no 
free fold across it; pelvics inserted under the third branched ray of 
dorsal; anal fin origin a little in front of that of adipose fin; intestinal 
canal short; about 20 pyloric caeca; anus just in front of anal origin; 
gceatest depth 4 to 4% and head 4 0 4 in standard length; diameter 
of orbit 3% to 4%, and of eye (between eyelids) 4% to 6%, interorbital 
2% to 2%, snout 2%4 to 3, all in the head; second et ray of dorsal 
about equal to first lbremelhed rays; first biecaeltied rays of anal longest; 
first branched rays of paired fins longest; posterior margins of dorsal, 
pectoral and paired fins a little rounded; that of anal a little concave; 
caudal deeply forked, the upper lobe usually a little longer; gill rakers 
short; the pectorals reach two-thirds the way to the pelvic insertion 
and the pelvics one-half the way to the anus; scales large. 
Oolor.—Brownish above, yellowish white below; sides with four 
broad vertical black bars sometimes reduced to a triangular blotch 
along midsides and a black spot at end of lateral line; the first vertical 
black bar on the body occurring above the middle of length of pectoral 
fin, second under dorsal fin, third and fourth between base of dorsal fin 
and adipose origin; adipose fin dusky to blackish in color; anal fin 
dusky as are caudal and dorsal fins; upper parts of head blackish; 
opercle blackish; peritoneum pale. 
Remarks.—This new subspecies may be distinguished from S. 
fasciatum fasciatum by the key on page 268. Figure 31, b,c, illustrates 
the different shapes of the teeth in Laemolyta and Anostomus. 
Named corti (=cut) after the common name of this fish in the 
Maracaibo Basin, as given to me on several occasions, probably re- 
ferring to its sharp ‘‘cutting”’ teeth. 
SCHIZODON FASCIATUM FASCIATUM Agassiz 
Schizodon fasciatus AGAssiz, in Spix, Selecta genera et species pisclum ... , Pp. 
66, pl. 36, 1829 (ref. copied) —E1GENMANN and ALLEN, Fishes of western 
South America, p. 303, 1942 (Venezuela to the Amazons and Rio Paraguay). 
Anostomus fasciatus GUNTHER, Catalogue of the fishes in the British Museum, vol. 
5, p. 304, 1864 (Caracas). —EI1GENMANN and E1GgENMANN, Proc. U.S. Nat. 
Mus.,:vol. 14, p. 50, 1891 (Caracas). 
SCHIZODON ISOGNATHUS Kner 
Schizodon isognathus Kner, Denkschr. Akad. Wiss. Wien, vol. 17, p. 163, pl. 6, 
fig. 13, 1859 (Rio Cujaba). 
Anostomus isognathus Peters, Monatsb. Akad. Wiss. Berlin, 1877, p. 472 ie 
Fernando de Apure, Venezuela). 
