340 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 95 
middle denticle longest and strongest, distal surface forming a more or less 
obtuse angle; outer row of premaxillary teeth usually not all in line; a black 
line along midaxis of body beginning behind pale area behind vertical hu- 
meral spot, thence continuing to elongate blackish caudal spot that extends 
on middle caudal fin rays, but color diffuse and fading distally on them; dorsal 
rays always ii, 8; origin of dorsal fin an equal distance between tip of snout 
and midcaudal fin base or a trifle closer to latter. 
2a. Anal rays ili, 23 to iil, 30, usually ili, 25 to iii, 28; usually 2 or 3 teeth on 
the maxillary; scales 5 or 6—36 to 39—3 or 4. 
Bryconamericus beta beta Higenmann 
2b. Anal rays iii, 20 to ili, 23, rarely ii, 23; usually 3 or 4 teeth on maxillary; 
scales 6-35 to 37-4 or 5; 4 scales between lateral line and anal origin; 
pelvic rays i, 7; pectorals i, 9 to i, 11, usually i, 10; gill rakers 4 to 6+8 
to 10; outer row of premaxillary usually with 5 teeth. 
Bryconamericus beta motatanensis, new subspecies 
1b. Depth 3.0 to 3.6, usually 3.2 to 3.5 in standard length; scales above lateral 
line 4 or 5, usually 5, and below it 3, rarely 4; anal rays iii, 13 to iii, 18; 
middle denticle on maxillary teeth little or no stronger than other denticles, 
distal edge of these maxillary teeth truncate or a little convex; maxillary 
teeth as broad as high; a wide dark lateral band, more intense posteriorly, 
ending in a black caudal spot that does not continue to end of middle caudal 
fin rays; a dark humeral spot, vertically elongate; peritoneum black; 5 or 
6 pyloric caeca. 
3a. Pelvic rays i, 7, occasionally i, 6; anal ili, 15 to iii, 17; pectoral! usually i, 10 
or 1411. 
4a. Two teeth in outer row of premaxillary, rarely 3; maxillary with 3 teeth, 
rarely 4; scales above lateral line usually 4, occasionally 5. 
Bryconamericus deuterodonoides deuterodonoides Eigenmann”? 
4b. Four teeth, rarely 3 or 5, in outer row of premaxillary; maxillary with 2 
or 3 teeth; scales above laterai line 5 and 3 scales between lateral line 
and anal origin. 
Bryconamericus deuterodonoides euryodous, new subspecies 
3b. Pelvic rays i, 6, rarely i, 5; anal iii, 13 to ili, 16; pectoral usually i, 9 or 
3, 10; 4 teeth, rarely 3 or 5, in outer row of premaxillary; maxillary with 
3 to 5 teeth; scales above latera! line usually 5, and 2 to 2% scales from 
lateral line to anal origin_____- Bryconamericus meridae (Higenmann) 
BRYCONAMERICUS BETA BETA Eigenmann 
Bryconamericus beta EIGENMANN, tm Eigenmann, Henn, and Wilson, Indiana 
Univ. Stud., No. 19, p. 7, 1914 (Villavicencio, Colombia); Indiana Univ. 
Stud., vol. 7, No. 44, p. 11, 1920 (Concejo, Rio Tiquirito, Venezuela); Mem. 
Carnegie Mus., vol. 9, No. 1, p. 236, 1922 (northern Venezuela); Mem. Mus. 
Comp. Zool., vol. 43, No. 4, p. 389, pl. 91, fig. 2, 1927 (Concejo, Rio Tiquirito, 
Venezuela). 
? Bryconamericus sp. ? EIGENMANN, Indiana Univ. Stud., vol. 7, No. 44, p. 11, 
1920 (Isla del Buro, Lake Valencia, Venezuela). 
U.S.N.M. No. 121468, 3 specimens, 21 to 25 mm., Rio Guérico and 
tributaries between San Sebastidn and San Casimiro, collected by 
L. P. Schultz, G. Zuloaga, R. Sherman, and William Phelps, Jr., 
May 12, 1942. 
22 Not reported from Venezuela but from Villavicencio, Colombia. 
