274. PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
KEY TO THE SPECIES OF TRIPORTHEUS FROM VENEZUELA AS REPORTED IN THE 
LITERATURE 
la. Scales 31 to 33; anal rays 28 to 30_____-_-_- Triportheus angulatus (Agassiz) 
1b. Seales 35 to 37; anal rays 26 or 27; gill rakers on first gill arch 30 to 
AREA an LCE) Oe RUE PY eV Ree IRL NR RE Triportheus rotundatus (Schomburgk) 
lc. Scales 40 to 43; anal rays 27 to 30; gill rakers 20 to 25. 
Triportheus elongatus (Giinther) 
No specimens from the Orinoco Basin were available to me for 
studying this genus; therefore, the three species herein listed need 
careful study from that stream system if and when collected. 
TRIPORTHEUS ANGULATUS (Agassiz) 
Chalceus angulatus AGassiz, in Spix, Selecta genera et species piscium ... 
Brasiliam ..., p. 67, 1829 (ref. copied). 
Chalcinus anygulutus StEINDACHNER, Denkschr. Akad. Wiss. Wein, vol. 41, p. 157, 
1879 (Ciudad Bolfvar, Venezuela).—-E1GENMANN and HIGENMANN, Proc. 
U.S. Nat. Mus., vol. 14, p. 56, 1891 (Orinoco).—EH1iGHNMANN and ALLEN, 
Fishes of western South America, p. 261, 1942 (Orinoco Basin to Amazons 
and the Paraguay). 
TRIPORTHEUS ROTUNDATUS (Schomburgk) 
Chalceus rotundatus SCHOMBURGK, The natural history of the fishes of [British] 
Guiana, vol. 1, p. 209, 1841 (ref. copied). 
Chaleinus brachypomus PELLEGRIN, Bull. Mus. Hist. Nat. Paris, vol. 5, p. 157, 
1899 (Apure River, Venezuela).—? Fowurr, Proc. Acad. Nat. Sci. Phila- 
delphia, vol. 88, p. 408, 1931 (Cafio Guanoco, Venezuela). 
TRIPORTHEUS ELONGATUS (Giinther) 
Chalcinus elongatus GUNTHER, Catalogue of the fishes in the British Museum, vol. 
5, p. 342, 1864 (locality ?).—SrernpacHNerR, Denkschr. Akad. Wiss. Wien, 
vol. 41, p. 157, 1879 (Ciudad Bolivar, Venezuela).—EI1GENMANN and EicEn- 
MANN, Proc. U. S. Nat. Mus., vol. 14, 1891 (Orinoco).—Fow.tsEr, Proc. 
Acad. Nat. Sci. Philadelphia, vol. 68, p. 432, 1911 (La Pedrita, on Cafio 
Uracoa, Venezuela).—EiGENMANN and ALLEN, Fishes of western South 
America, p. 262, 1942 (Orinoco and Guianas to Amazons). 
Subfamily GASTEROPELECINAE 
KEY TO THE GENERA AND SPECIES OF GASTEROPELECINAE FROM VENEZUELA 
la. No adipose fin; dorsal rays 10; anal 22 or 28; scales 26; head 334, depth 2, in 
standard length; maxillary with a single tooth; no dark wavy cross bands; 
dark line from above pectoral to caudal base; dark band around lower jaw 
to eye and another lower down; two dark lines backward from eye across 
opercle; entire lower edge of body from caudal to chin bounded by a narrow 
dark line, this forking on breast, one branch on each side, leaving a narrow 
median V-shaped area below chin______._-_- Carnegiella marthae Myers 
16. Adipose fin present, well developed; maxillary with 3 to 5 well-developed 
teeth. 
‘2a. Premaxillary with a single tow of tricuspid teeth; anterior profile nearly 
PStrane hh tUUveu Wee COT CONE VNU Sve Oy LO en Gasteropelecus Scopoli 1® 
2b. Premaxillary with a double tow of tricuspid teeth, outer row represented 
by 1 to 3 teeth; anterior profile convex (Thoracocharaz). : 
16 Not reported from Venezuela. 
