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PROCEEDINGS OF THE NATIONAL MUSEUIM 



VOL. 94 



and 1.1 to 1.3 in interorbital ; pectoral and dorsal spines almost equal 

 in length; supraoccipital process about as long as the snout; adipose 

 fin elongate, its total length contained from 2.8 to 3.2 in the standard 

 length, and origin of adipose 2% eye diameters behind base of dorsal 

 fin; head about 4% in the standard length and depth 5 to 6 times; anus 

 almost equidistant from tip of snout and base of caudal fin; first dor- 

 sal ray not longer than branched rays of that fin ; intestine with a few 

 convolutions. 



Detailed measurements were made on the holotype and a few para- 

 types, and these data are recorded in table 4. 



Color. — Grayish, with a black lateral streak from snout to base of 

 caudal fin, fading on middle rays of that fin; a blackish streak along 

 each side of dorsal fin extending to head; dorsal fin with pigment in 

 front of each ray on interradial membrane, the anterior two-thirds 

 of membrane hyaline; anterior tubular nostril blackish; peritoneum 

 silvery. 



Fin-ray counts are recorded in table 5, but the holotype has the 

 following: Dorsal I, 6; anal v, 8; pectoral I, 8-1, 8; pelvic i, 5; 

 branched rays in caudal fin 15. 



Remarks. — This new subspecies differs from P. chagresi chagresi 

 (Steindachner) by having longer barbels, as indicated in the key. 



Named odynea in reference to the severe pain caused by these little 

 catfishes when my fingers were pricked by their pectoral spines. 



PIMELODELLA CHAGRESI CHAGRESI (Steindachner) 



Pimelodus (Pseudorhamdia) chagresi Steindachner, Sitzb. Akad. Wiss. Wien, 

 vol. 74, p. 34, 1S76 (Rio Chagres and its tributary, near Obispo). 



U.S.N. M. No. 121130, 14 specimens, 26 to 83 mm., collected by Leonard P. 

 Schultz in the Rio Gonzdles at La Gonzdles, Rio Chama system, Maracaibo Basin, 

 Estado de Mdrida, March 29, 1942. 



U.S.N. M. No. 121131, 32 specimens, 48 to 82 mm., collected by Leonard P. 

 Schultz in the Rfo Chama at Estanques, Estado de M6rida, April 3, 1942. 



Table 5. — Fin-ray counts for certain species of Pimelodella from the Maracaibo 



Basin, Venezuela 



Genus PINIRAMPUS Bleeker 



Pinirampus Bleeker, Ichthyologiae Archipelagi Indici Prodromus, vol. 1, p. 198, 

 1858. (Type, Pimelodus pirinampu Agassiz.) 



