CHARACINIDAE FROM VENEZUELA—SCHULTZ 341 
Thirteen specimens, 23 to 45 mm., from Caripito, Venezuela, 
William Beebe, 1942, were lent to me for study and report. 
BRYCONAMERICUS BETA MOTATANENSIS, new subspecies 
Figure 50 
Holotype.—U.S.N.M. No. 121477, a specimen 39.5 mm. in standard 
length, collected by Leonard P. Schultz, March 20, 1942, in the Rio 
San Juan at bridge south of Mene Grande, Motatén system. 
Paratypes.—All paratypes were collected by Leonard P. Schultz 
during 1942 in the Maracaibo Basin of Venezuela: 
U.S.N.M. No. 121478, 77 specimens, 22 to 47 mm., taken along with the holo- 
type and bearing same data. 
U.S.N.M. No. 121479, 10 examples, 22.5 to 36 mm., Rio Motatdn, 4 km. above 
Motatdn, March 25. 
U.S.N.M. No. 121481, 45 examples, 22 to 44 mm., Rio San Pedro at bridge 
south of Mene Grande, Motatdn system, March 17 to 20. 
U.S.N.M. No. 121480, 1 specimen, 34.5 mm., from Rio Jimelles, 12 km. east of 
Motatdn, Motatan system, March 24. 
Ficure 50.—Bryconamericus beta motatanensis, new subspecies: Holotype, U.S.N.M. No. 
121477, 39.5 mm. in standard length. 
This species occurred in the quieter eddies of these rivers. 
Description.—Based on the holotype and paratypes listed above. 
Detailed measurements were made on the holotype and,one paratype, 
and these data, recorded in hundredths of the standard length, are 
siven first for the holotype, then the paratype in parentheses. Stand- 
ard lengths in mm. 39.5 (46). 
Length of head 29.1 (28.3); greatest depth 36.7 (36.1); length of 
snout 7.09 (6.74); diameter of eye 10.6 (9.78); length of maxillaries 
10.6 (10.9); width of interorbital 9.37 (9.35); postorbital length of 
head 12.9 (13.5); least depth of caudal peduncle 13.2 (12.8); length of 
caudal peduncle or distance from base of last anal ray to midcaudal 
