THE CATFXSHES OF VENEZUELA — ^S€IIULTZ 199 



PSEUDOPIMELODUS VILLOSUS BUTCH ERI. new subspecies 



Plate 1, B 



Holotype. — U.S.N.M. No. 121270, a specimen 107 mm. in standard 

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

 the Rio San Juan near bridge south of Mene Grande, tributary to 

 Rio Motatan, Maracaibo Basin. 



Paratypes (all collected by L. P. Schultz).— U.S.N.M. No. 121273, 

 58 specimens, 29.5 to 172 mm., collected along with the holotype and 

 bearing the same data; U.S.N.M. No. 121280, 2 examples, 34 and 184 

 mm., March 24, 1942, from the Rio Motatan, 8 km. below Motatan; 

 U.S.N.M. No. 121272, 2 specimens, 39.5 and 44 mm., March 17, 1942, 

 from the Rio Motatan, at bridge 22 km. north of Motatan; U.S.N.M. 

 No. 121271, 25 specimens, 29.5 to 69 mm., March 20, 1942, from the 

 Rio San Pedro near bridge south of Mene Grande, tributary to 

 Motatdn system; U.S.N.M. No. 121278, 1 specimen, 27.5 mm., 

 March 24, 1942, from the Rio Jimelles, 12 km. east of Motatan, 

 tributary to Rio Motatan; U.S.N.M. No. 121276, 11 examples, 35 to 

 60 mm., March 21, 1942, from the Rio Machango, 20 km. above 

 bridge south of Lagunillas, Maracaibo Basin; U.S.N.M. No. 121277, 1 

 specimen, 45 mm., March 6, 1942, from the Rio Palmar at the bridge 

 70 km. southwest of Maracaibo; U.S.N.M. No. 121275, 1 specimen, 38 

 mm., February 21, 1942, from the Rio Palmar near Totuma, about 100 

 km. southwest of Maracaibo; U.S.N.M. No. 121274, 6 examples, 16 

 to 52 mm., February 24, 1942, from the Rio Socuy, 3 km. above its 

 mouth, Maracaibo Basin; U.S.N.M. No. 121279, 5 specimens, April 1, 

 1942, from the Rio Tdchira, 7 km. north of San Antonio, Catatumbo 

 system. 



Description. — Based on holotype and paratypes listed above. 

 Measurements, expressed in hundredths of the standard length, are 

 recorded below, first for the holotype, then for two paratypes in par- 

 entheses, respectively. Standard length (in mm.) 107 (45.5; 184). 



Length of head to end of operculum 33.6 (36.2; 33.3); greatest 

 depth of body 22.0 (20.9; 21.7); length of snout 12.2 (12.5; 12.5); 

 diameter of eye 3.36 (3.73; 2.83); width of fleshy interorbital space 

 12.3 (11.4; 15.5); distance between rims of anterior and posterior 

 nostrils 4,20 (4.18; 4.62) ; distance from eye to rim of posterior nostril 

 2.80 (2.42 ; 3.21) ; width of premaxillary band of teeth 2.24 (2.42 ; 2.39) ; 

 width across outer angles of maxillaries 2.15 (2.20; 2.45) ; width across 

 base of pectorals 29.2 (29.7; 29.6); length of maxillary barbels 30.4 

 (34.1 ; 28.8) ; length of anterior mental barbels 9.53 (9.44; 10.7) ; length 

 of posterior mental barbels 19.6 (15.6; 16.8); least depth of caudal 

 peduncle 13.5 (13.0; 12.8); length of caudal peduncle 14.5 (16.0; 16.5); 

 total length of adipose fin 18.2 (22.0; 15.2); length of base of adipose 

 fin 12.6 (15.8; 11.7); length of base of anal fin 13.1 (14.3; 12.8); dis- 



