Jordan and Evermaim. Fishes of North America. 153 



243. BHAMDIA MICROPTERA, (GUnther). 



Head4|; depth 7|; D.I, 6; A. 13. Occipital process slender, not reach- 

 ing base of dorsal ; adipose fin 2f in length ; maxillary barbels reaching 

 end of dorsal. Pectoral spine a little more than \ head. Ventral very 

 short, shorter than pectoral. Anal small; caudal short, the lower lobe 7 

 in body. Blackish; dorsal with a faint band. Rio San Geronimo. 

 (Giinther.) (/UKpof, small ; irrep'ov, fin.) 

 Piiel<t<1ns microplerus, GUNTHER, Cat., v, 124, 1864, Rio San Geronimo, Guatemala. 



244. RHAMDIA MANAGUENSIS, (Giinther). 



Head 5; depth 6. D. I, 6; A. 14 or 15. Occipital process slender, not 

 reaching basal bone of dorsal; adipose fin more than i length ; maxillary 

 barbels short, reaching nearly to base of dorsal spine; dorsal spine short. 

 Color uniform brown ; dorsal with a pale cross-band. Lake Managua, 

 Nicaragua. (Giinther.) 



Pimelodus managuensis, GUNTHER, Fishes Cent. Am., 474, 1869, Lake Managua, Nicaragua. 



245. RHAMDIA POLYCAULUS, (GUnther). 



Head 5 ; depth 6. D. I, 7; A. 15. Occipital process short ; adipose fin 

 long, 3 in length ; maxillary barbels to tip of pectoral; dorsal spine very 

 short ; caudal lobes equal. Uniform blackish. Rio San Geronimo. (Giin- 

 ther.) (TroPu'f, many; KoDAof, stem; the number of dorsal and anal rays 

 being greater than usual.) 

 Pimelodus polycaulm, GUNTHEK, Cat., v, 131, 1864, Rio San Geronimo. 



246. RHAMDIA PETENENSIS, (Gunther). 



Head 4-; depth 6. D.I, 6; A. 11. Adipose fin low but long, more than 

 i length, the maxillary barbels reaching to its front. Tail deep; its depth 

 more than ^ the head. Lower jaw scarcely shorter. Dorsal spine very 

 feeble ; pectoral spine not quite i head. Ventral fin short, brownish, with 

 a dark lateral band ; dorsal with the usual band. Lake Peten, Yucatan. 

 (Gunther.) 

 Pimelodus petenensis, GUNTHER, Cat., v, 126,1864, Lake Peten, Yucatan. 



247. RHAMDIA PARRTI, (Eigenmann). 



Head 4f ; depth 4 to 5. D.I, 6; A. 12 to 14. Upper jaw longer than 

 lower. Occipital process moderate. Dorsal spine very low and weak ; 2i 

 to 2| in head ; pectoral spine 2 to 2J in head ; caudal 4 to 5. Occipital 

 process very narrow and short. Maxillary barbels short, extending little 

 beyond dorsal fin ; caudal lobe short and broad. Adipose fin 3 to 31 

 in length. Brownish, a dark lateral band. Rio Zanalenco, Chiapas. 

 (Eigenmann.) (Named for Dr. C. C. Parry, a well-known botanist.) 



Rhamdella parryi, EIGENMANN, Proc. Cal. Ac. Sci., 1888, 130, Rio Zanalenco, Chiapas. 



82. PIMELODELLA, Eigenmann & Eigemannn. 



Pteudorhamdui, STEINDACHNER, Siisswasserf. Sudiistl. Bras., m, 1876, 46, (Interiftriga) ; not of 



Bleeker, which is Pimelodus. 

 Pimelodella. EIGENMANN & EIGENMANN, Proc. Cal. Ac. Sci., 1888, 131, (cristatu*). 



