152 Bulletin 47, United States National Museum. 



dorsal. Orizaba, Mexico ; allied to R. motaguensis, but with smaller eye, 

 deeper body, and slight difference in fin rays. (Cope.) (Bpaxve, short ; 

 irrepov, fin.) 

 Pimelodus brachypterus, COPE, Trans. Am. Phil. Soc., 1866, 404, Orizaba, Mexico. 



237. KHAMDIA SALTINI, (Gunther). 



Head 5; depth 6. A. 11, Occipital process short; adipose fin 4 in length; 

 maxillary barbels short, not reaching tip of pectoral; dorsal spine very 

 feeble; pectoral spine very short, not J- head; caudal lobes subequal. 

 Coloration plain brown. Rio San Geronimo, Guatemala. (Gunther.) 

 (Named for Oscar Salvin, who collected largely in Central America.) 

 Pimelodus salvini, GUNTHER, Cat., v, 130, 1864, Rio San Geronimo, Guatemala. 



238. RHAMDIA HYPSELURUS, (Gunther). 



Head 5; depth 6. D.I, 6; A. 13. Occipital process triangular; adipose 

 fin 4 in length ; maxillary barbels reaching to the end of dorsal. Caudal 

 peduncle deeper than long ; caudal lobes both rounded. Uniform blackish. 

 Mexico. (Gunther.) (vtpeAoe, high; oitpd, tail.) 

 Pifnelodus hypselurus, GUNTHER, Cat., v, 126, 1864, Mexico. 



239. RHAMDIA LATICAUDA, (Heckel). 



D. I, 6; A. 13. Occipital process short; adipose fin 3 in length, 

 maxillary barbels reaching ventral ; tail about as deep as body ; pectoral 

 spine i as long as the rays; caudal subtruncate. Mexico. (Heckel.) 

 (latus, broad ; cauda, tail.) 



Pimelodus laticaudus, HECKEL, in Kner, Sitz. Wien, Ac., xxvi, 420, 1857, Mexico. 

 Pimelodus laticaudus, GUNTHER, Cat., v, 127, 1864. 



240. RHAMDIA GODMANI, (Gunther). 



Head 4; depth 6. D. I, 6; A. 13. Occipital process triangular, much 

 longer than broad. Adipose fin 3 in length. Lower jaw little shorter 

 than upper. Pectoral spine not more than \ head, serrated. Caudal 

 lobes equal. Color brown; dorsal with the usual band. Valley of Rio 

 Usumacinta, Guatemala. (Named for Mr. F. Godman, associate of 

 Salvin.) 

 Pimelodus godmani, GUNTHER, Oat., v, 124, 1864, Rio Usumacinta, Guatemala. 



241. RHAMDIA GUATEMALENSIS, (Gunther). 



Head 4 ; depth 6. A. 13. Adipose fin long, 2 in length ; maxillary 

 barbels about reaching middle of adipose fin. Dorsal spine very feeble ; 

 pectoral short, i as long as head ; lower caudal lobe long. Blackish ; dor- 

 sal with very light band. Huamuchal, Guatemala. (Gunther.) 

 Pimelodus gualematoisis, GUNTHER, Cat., v, 122, 1864, Rio Huamuchal, Guatemala. 



242. RHAMDIA NICARAGUENSIS, (Gunther). 



Head 4i; depth 7. D. I, 6 ; A. 13. Adipose fin 2| in length ; maxillary 

 barbels reaching its front ; pectoral spine f- head. Blackish ; dorsal with 

 a faint pale band. Lake Nicaragua. (Gunther.) 

 Pimelodus nicaraguensis, GCNTHER, Cat., v, 125, 1864, Lake Nicaragua, Nicaragua. 



