262 — PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
1b. Scales in lateral line about 53, 10 or 11 above and 10 below to base of pelvies; 
dorsal rays ii, 9; anal iii, 9; pelvic 10 [?, i, 9] (Orinoco Basin). 
Prochilodus laticeps Steindachner 
PROCHILODUS RETICULATUS RETICULATUS Valenciennes 
BocacHIca 
Prochilodus reticulatus VALENCIENNES, in Cuvier and Valenciennes, Histoire 
naturelle des poissons, vol. 22, p. 92, 1849 (Lago Maracaibo).—Gtnrumr, 
Catalogue of the fishes in the British Museum, vol. 5, p. 295, 1864 (Lago 
Maracaibo). 
The following specimens were collected by Leonard P. Schultz dur- 
ing 1942 in the Maracaibo Basin of Venezuela: 
U.S.N.M. No. 121324, 31 examples, 125 to 325 mm. in standard length, from 
the Rio Palmar about 100 km. southwest of Maracaibo, near Totuma, February 21. 
U.S.N.M. No. 121326, 4 examples, 106 to 113 mm., from a pool of the Rfo San 
Ignacio about 20 km. south of Rosario, February 26. 
U.S.N.M. No. 121338, 10 specimens, 106 to 224 mm., from the Rio Negro 
below the mouth of the Rio Yasa, March 2. 
U.S.N.M. No. 121330, 2 specimens, 131 and 158 mm., from Lago Tulé, about 
75 km. west of Maracaibo, March 1. 
U.S.N.M. No. 121329, 2 examples, 203 and 215 mm., from a cafio %4 km. 
west of Sinamaica, March 11. 
U.S.N.M. No. 121331, 6 examples, 195 to 345 mm., from the Rio Apén about 
35 km. south of Rosario, February 26. 
U.S.N.M. No. 121827, a specimen, 176 mm., from the Rio Motatdn at the 
bridge, 22 km. north of Motatén, March 17. 
U.S.N.M. No. 121828, 9 examples, 64 to 303 mm., from the Rio Socuy, 3 km. 
above mouth, February 24. 
U.S.N.M. No. 121322, an example, 200 mm., from the Rio Jimelles, 12 km. 
east of Motatan, Motatan system, March 24. 
This species of bocachica reaches the largest size among the three 
forms occurring in the Maracaibo Basin. 
Since this species has never been adequately described or recog- 
nized, a description was drawn up: Detailed measurements were 
made on two specimens, and these data, expressed in hundredths of 
the standard length, are recorded below, respectively. Standard 
length in mm. 177 and 1138. 
Length of head 31.6 and 31.0; length of snout 13.6 and 11.1; dis- 
tance between fleshy eyelids along horizontal axis 5.20 and 6.64; 
diameter of orbit 6.78 and 8.14; interorbital space 15.3 and 16.3; 
postorbital length of head 14.7 and 13.7; least depth of caudal pe- 
duncle 12.3 and 12.4; length of caudal peduncle 13.6 and 15.0; distance 
from eye to nostrils 3.11 and 3.19; snout to dorsal origin 49.2 and 47.8; 
snout to anal origin 78.5 and 77.2; snout to adipose origin 84.0 and 
87.2; snout to pelvie insertion 53.4 and 50.4; snout to pectoral fin 
28.3 and 29.3; snout to anus 76.2 and 75.2; length of base of anal fin 
12.2 and 12.4; length of dorsal base 17.2 and 19.9; length of longest 
ray of dorsal fin 23.7 and 28.7; length of longest anal ray 16.7 and 
