U. S. NATIONAL MUSEUM 



PROCEEDINGS. VOL. 94 PLATE 3 



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A, Cetopsorhamdia Orinoco, new species: Holotype (U.S.N.M. No. 121214), Si.S mm. in 

 standard length; B, Perrunichthys perruno, new genus and species: Holotype (U.s'.N.M. 

 No. 121189), 270 mm.; C, Platysilurus mdarmo, new species: Holot\-pe (U.S.N.M. No 

 121179). 316 mm. A and B, retouched photographs; C, drawing. 



