292 PROCEEiDINGS OF THE NATIONAL MUSEUM vol. 94 



Aragua, Venezuela, collected by Leonard P. Schultz, W. H. Phelps, Jr., Roger 

 Sherman, and G. Zuloaga, May 12, 1942. 



U.S.N. M. No. 116467, from Magdalena River, near Honda, Colombia, collected 

 by Cecil Miles. 



Measurements for this species are given in tables 14 and 15. 



CHAETOSTOMA GUAIRENSIS Steindachner 

 CORRONCHO 



Chaetostomus giiairensis Steindachner, Denkschr. Akad. Wiss. Wien, vol. 43, 

 p. 121, pi. 3, figs. 1, la, 1882 (Guaire at Caracas, Venezuela). — Regan, 

 Trans. Zool. Soc. London, vol. 17, pt. 3, p. 249, 1904 (Caracas). — Eigenmann, 

 Indiana Univ. Studies, vol. 7, No. 44, p. 9, 1920 (Rio Castano, at Maracay, 

 Venezuela). — Rohl, Fauna descriptiva de Venezuela, p. 384, 1942 (no locality). 



CHAETOSTOMA STANNII LUtken 



Chaelostomxis stannii Lijtken, Vid. Medd. Naturh. Foren. Kj0benhavn, pts. 12-16, 

 p. 206, 1874 (Puerto Cabello, Venezuela). — Steindachner, Denkschr. Akad, 

 Wiss. Wien. vol. 43, p. 120, pi. 5, fig. 4, 4a, 1882 (Puerto Cabello).— Regan, 

 Trans. Zool. Soc. London, vol. 17, pt. 3, p. 248, 1904 (Puerto Cabello). 



CHAETOSTOMA ANOMALA SOVICHTHYS. new subspecies 



Corroncho 

 Plate 8, A, B 



Holotype. — U.S.N. M. No. 121053, a specimen 71.5 mm. in standard 

 length taken by Leonard P. Schultz on March 20, 1942, near the 

 bridge over the Rio San Pedro, a tributary of the Rio Motat^n, 

 southeast of Mene Grande, in the Maracaibo Basin. This river was 

 a succession of pools and riffles, the bottom covered with rubble. 



Paratypes (all collected by L. P. Schultz).— U.S.N.M. No. 121056, 

 118 specimens, 19 to 72.5 mm. in standard length, taken along with 

 the holotype and bearing the same data; U.S.N.M. No. 121058, 14 

 specimens, 43.8 to 62.7 mm. in standard length, taken on March 17 

 and 20, 1942, near the bridge in the Rio San Juan, tributary of the 

 Rio Motat^n, southeast of Mene Grande, Maracaibo Basin; U.S.N.M. 

 No. 121055, 20 specimens, 12.8 to 45.2 mm. from the Rio Motatan, 4 

 km. above Motatan, March 25, 1942; U.S.N.M. No. 121057, 3 speci- 

 mens, 17.5 to 45 mm., from the Rio Jimelles, 12 km. east of Motatan, 

 a tributary of the Rio Motatan, Maracaibo Basin, March 24, 1942; 

 U.S.N.M. No. 121054, 15 specimens, 12 to 30 mm., from the Rio 

 Motatan, 8 km. below Motatan, March 24, 1942. 



In addition, Dr. H. Pittier, in 1923, collected 2 specimens, U.S.N.M. 

 No. 86262, 20 and 36.5 mm., in the Rio Motatan near Valeria, Estado 

 de Trujillo, Venezuela. 



In all the localities where this species occurred the water flowed 

 rapidly and the stream bottoms were composed of gravel to rubble. 



