232 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 94 



giving these fins a mottled appearance; paired fins blackish; maxillar}' 

 barbel blackish to dark brown basally, barred with brown distally; 

 outer mental barbel barred with brownish; inner mental barbel pale; 

 just inside band of teeth on lower jaw is a darkish band. 



Remarks. — This new species differs from all other pimelodid cat- 

 fishes in the shape, size, and arrangement of the villifonn patches of 

 teeth in the roof of the mouth, as well as in color pattern, length and 

 shape of barbels, and concave interorbital space, among other dif- 

 ferences. 



Named perruno after the common name of this species in tlic 

 Maracaibo Basin. 



Genus BRACHYPLATYSTOMA Sleeker 



Brachyplatystoma Bleeker, Nederl. Tijdschr. Dierk., vol. 1, p. 97, 1863. (Type, 

 Plaiystoma vaillanti Cuvier and Valenciennes.) 



BRACHYPLATYSTOMA VAJLLANTI (Cavier and Valenciennes) 



Figure 3, e 



Plaiystoma vaillanti Cuvier and Valenciennes, Higtoire naturelle des poissons, 

 vol. 15, p. 21, pi. 423, 1840 (Cayenne and Surinam). — Peters, Monatsb. 

 Akad. Wiss. Berlin, 1877, p. 469 (Calabozo), 



Genus PSEUDOPLATYSTOMA Bleeker 



Pseudo-platy stoma Bleeker, Nederl. Tijdschr. Dierk., vol. 1, p. 97, 1863. (Tj'pe, 

 Silurus fasciatus Linnaeus). 



PSEUDOPLATYSTOMA FASCIATUM (Linnaeus) 



Bagre Rayado 

 Figure 3, a 



Silurus fasciatus Linnaeus, Systema naturae, ed. 12, vol. 1, p. 505, 1766. 



Pseudoplaly stoma fasciatum Eigenmann and Allen, Fishes of western South 

 America, p. 108, 1942 (La Plata northward to the Magdalena, Orinoco, and 

 Guiana).— RoHL, Fauna descriptiva de Venezuela, p. 375, 1942 (Rio Apure 

 at Bolivar). 



Plaiystoma fasciatum Peters, Monatsb. Akad. Wiss. Berlin, 1877, p. 469 (Cala- 

 bozo, Venezuela). 



Genus PLATYSILURUS Haseman 



Platysilurus Haseman, Ann. Carnegie Mus., vol. 7, p. 320, pi 52, 1911. (Type, 

 Platysilurus barbatus Haseman.) 



This genus of pimelodid catfishes was not adequately described by 

 Haseman. The following description is based entirely on the species 

 found in the Maracaibo Basin: 



