268 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
Wien, vol. 41, p. 155, 1879 (Ciudad Bolfvar).—E1GENMANN and EIGENMANN, 
Proc. U. S. Nat. Mus., vol. 14, p. 51, 1891 (Orinoco).—PELLEGRIN, Bull. 
Mus. Hist. Nat. Paris, vol. 5, p. 157, 1899 (Apure River, Venezuela). 
LEPORINUS HYPSELONOTUS Giinther 
Leporinus hypselonotus GUntTuHER, Proc. Zool. Soc. London, 1868, p. 244, pl. 22 
(Xeberos).—STEINDACHNER, Denkschr. Akad. Wiss. Wien, vol. 44, p. 12, 
1882 (Ciudad Bolivar).—-EigENMANN and ALLEN, Fishes of western South 
America, p. 308, 1942 (Orinoco). 
LEPORINUS MULLERI Steindachner 
Leporinus miillerti StEINDACHNER, Denkschr. Akad. Wiss. Wien, vol. 44, p. 12, 
1882 (Orinoco at Ciudad Bolfvar)—EI1gENMANN and EIGENMANN, Proc. 
U. S. Nat. Mus., vol. 14, p. 51, 1891 (Orinoco).—E1GENMANN and ALLEN, 
Fishes of western South America, p. 306, 1942 (Orinoco). 
Genus GNATHODOLUS Myers 
Gnathodolus Myxrs, Bull. Mus. Comp. Zool., vol. 68, No. 3, p. 108, 1927. (Type, 
Gnathodolus bidens Myers.) 
GNATHODOLUS BIDENS Myers 
Gnathodolus bidens Myers, Bull. Mus. Comp. Zool., vol. 68, No. 3, p. 108, 1927 
(Rio Cassiquiare, Chemoni [near Bifurcation], Laga Tama-Tama, Bifurcation, 
Venezuela). 
Genus SCHIZODON ?2 Agassiz 
Schizodon Acassiz, in Spix, Selecta genera et species piscium,. .. Brasiliam..., 
p. 66, pl. 36, 1829. (Type, Curimatus fasciatus Agassiz.) (Ref. copied.) 
KEY TO THE SPECIES OF SCHIZODON REPORTED FROM VENEZUELA 
la. Side of body with 4 broad vertical black bars sometimes reduced to a tri- 
angular blotch along midsides and a black spot at end of lateral line; first 
vertical black bar occurring above middle of length of pectoral fin, second 
under dorsal fin, third and fourth between base of dorsal fin and adipose 
origin; scales usually 4% to 54%+41 to 44+4 or 5. 
2a. Number of scales between lateral line and origin of dorsal fin 5%; scales 
from lateral line to anal origin 5; gill rakers about 25 to 30. 
Schizodon fasciatum corti, new subspecies 
2b. Number of scales between lateral line and origin of dorsal fin 4%; scales 
from lateral line to anal origin 4; gill rakers on two specimens 21 and 24. 
Schizodon fasciatum fasciatum. Agassiz 
1b. Along midaxis of body a wide black band extending to tips of middle caudal 
fin rays, this band set off by a pale streak above it and paler color below 
it; scales 64+44 to 46+5__._____._-_-_-- Schizodon isognathus Kner 
12 The following key will aid in the separation of those genera related to Schizodon. Anostomus Scopoli, 
Introductio ad historiam naturalem . . ., p. 451, 1777; Cuvier and Cloquet, Dict. Sci. Nat., ed. 2, p. 2, suppl. 
p. 69, 1816 (type, Salmo anostomus Linnaeus), as yet has not been reported from Venezuela. 
la. Middle teeth of lower jaw trifid, with 3 points (fig. 31, a); mouth terminal, somewhat oblique; lips not 
DILTCA CE ke Us DA Se ENG BSS ES RL USE AMOR SE ROS Se as EA IO EL Sg OR Schizodon Agassiz 
1b. Middle teeth of lower jaw incisors with truncate edge (fig. 31, 6); mouth terminal, oblique; lips not plicate. 
Laemolyta Cope 
1c. Middle teeth of lower jaw bifid with 2 points (fig. 31, c); snout elongate; mouth oblique opening dorsally; 
TIPS PLICA TS So re ly EN SNe tere PINE NESE TS AML tat UNA AO La Mn Anostomus Scopol 
