THE CArnSHES OF VENEZUEiLA — SCHULTZ 213 



PIMELODELLA CHAGRESI ODYNEA, new subspecies 



Plate 2, A 



Holotype. — U.S.N.M. No. 121133, a specimen, 89 mm. in stand- 

 ard length, collected by Leonard P. Schultz, March 17 and 20, 1942, 

 m the Rio San Juan at the bridge south of Mene Grande, Motatdn 

 system, Maracaibo Basin. 



Paratypes.—V.S.'NM. No. 121141, 26 specimens, 49 to 92 mm., 

 collected along with the holotype and bearing the same data. Other 

 paratypes as follows (collected by L. P. Schultz unless otherwise 

 indicated): 



U.S.N.M. No. 121140, Hio Motattln, 4 km. .nbove Afotatan, March 25, 1942, 

 8S specimens, 29 to 90 mm. (several females have their abdomens enlarged with 

 eggs). 



U.S.N.M. No. 121134, Rio Motatdn at bridge 22 km. north of Motatdn, 

 :March 17, 1942, 50 specimens, 44 to 80 mm. 



U.S.N.M. No. 121136, Rio Motatdn, 8 km. below MotatAn, IMarcli 24, 1942, 

 103 specimens, 23.5 to 71 mm. 



U.S.N.M. No. 121143, Rfo Jimelles, 12 km. east of Motat^n, Motatdn system, 

 March 24, 1942, 8 specimens, 26.5 to 57.5 mm. 



U.S.N.M. No. 121137, Rfo San Pedro at bridge, Motatdn system, March 20, 

 1942, 3 specimens, 70 to 77 mm. 



U.S.N.M. No. 121138, Rio Machango, at bridge south of Lagunillas, Mara- 

 caibo Basin, March 16, 1942, 3 specimens, 51 to 80.5 mm. 



U.S.N.M. No. 121144, Rfo Machango, 20 km. above the bridge .south of 

 Lagunillas, March 21, 1942, 3 specimens, 26.5 to 77.5 mm. 



U.S.N.M. 121142, Rio Socuy, 3 km. above its mouth, Maracaibo Basin, Feb- 

 ruary 24, 1942, 18 specimens, 33.5 to 90 mm. 



U.S.N.M. No. 82618, Sierra de Perija, obtained by Theodoor de Booy, moun- 

 tains north of Maracaibo, 1 specimen, 42.5 mm. 



U.S.N.M. No. 121135, Rio Apon, about 35 km. south of Rosario, Maracaibo 

 Basin, February 26, 1942, 2 specimens, 52 and 61 mm. 



U.S.N.M. No. 121213, Rfo Negro below mouth of Rfo Yasa, Maracaibo Basin, 

 March 2, 1942, 22 specimens, 30.5 to 69.5 mm. 



U.S.N.M. No. 101610, Rio Pamplonita, near Cucuta, Santander del Norte, 

 Catatumbo system, Maracaibo Basin, Colombia, collected by Niceforo Maria, 

 1 specimen, 84.5 mm. 



U.S.N.M. No. 121252, Cucuta, Colombia, coll-ctt d by Niceforo Marfa, 1 

 specimen, 100 mm. 



U.S.N.M. No. 121139, Rfo Tdchira, 7 km. north of San Antonio, Catatumbo 

 system, April 1, 1942, 1 specimen, 75.3 mm. 



Description. — ^Body naked, gill membranes extending far foi-ward 

 on isthmus; two pairs of nostrils, widely separated, the anterior pair 

 tubular; a wide band of villiform teeth on prema.xillaries and a nar- 

 rower band on dentarics; posterior edge of pectoral spine with 9 to 

 12 teeth, the distal third smooth; the distal third of the anterior edge 

 of pectoral spine with shallow serrations; maxillary pair of barbels 

 reaching to caudal peduncle, sometimes only to end of anal fin; outer 

 mental barbel reaching to opposite tips of pectorals, and inner mental 

 barbel reaching a little past base of pectorals; eye 1.8 or 1.9 in snout. 



