*THE CATFISHES OF VENEZUEIiA — S€HIILTZ 235 



The following counts were made: Dorsal 1,6 (1,6); anal vi, 9 (vi,9); 

 pectoral 1,10 (1,9) ; pelvic i,5 (i,5) ; branched rays of caudal fin 15 (16) ; 

 number of gill rakers on first gill arch — (5 + 12). 



The caudal peduncle is slender, rounded; origin of anal a little behind 

 that of adipose origin ; pelvics inserted about under the fourth branched 

 ray of the dorsal; the supraoccipital process is a little divided in the 

 midline posteriorly, so that the predorsal plate projects a little into the 

 supraoccipital process; a fontanel begins on snout and extends back- 

 ward through interorbital space almost to base of supraoccipital pro- 

 cess; eyes superior-lateral in position, not showing from below, about 

 2 to 2.2 in interorbital space, and 4.8 to 5.3 in the snout; postorbital 

 length of head about Ko length of snout; width of snout at corners of 

 mouth % width of head at base of pelvics; total length of adipose fin 

 5 to 6K times in standard length; height of adipose fin about 2^^ in its 

 total length; adipose fin length a httle shorter than snout but much 

 longer than base of anal fin; pectoral spine almost as long as snout and 

 eye; the filamentous end of the maxillary barbel, if unbroken, is as 

 long as or longer than the ossified part of this barbel, the ossified part 

 reaching to opposite rear of dorsal fin; other characters described 

 under the genus. 



Color. — Grayish to blackish or brownish above, paler on lower 

 sides, white ventrally; the most consistent and prominent color mark 

 is a large black spot at base of upper lobe of caudal fin; sides of body 

 with an irregular row of large black blotches more or less along lateral 

 line anteriorly, but above it on caudal peduncle; in the holotype the 

 black spots are less prominent than on all the other paratypes, but 

 it was selected because it was a more perfect specimen otherwise; 

 sometimes smaller black spots are scattered on back, as well as on 

 dorsal, adipose, and sometimes on basal parts of caudal fin; anal and 

 paired fins white; lower half of lower lobe of caudal fin blackish, the 

 upper part of this lobe white; upper lobe pale grayish, the long upper 

 simple ray dark grayish; peritoneum pale. 



Remarks. — This new species dift"ers from all other pimelodid cat- 

 fishes in the extremely long barbels in combination with the color pat- 

 tern and arrangement of the broad villiform patches of teeth widely 

 separated from each other and from P. barbatus as indicated in the key 

 on page 233. 



Named malarmo (bony-cheek) after the common name of this species 

 as given to me by the Venezuelans who went along with me on the trip 

 to the Rio Negro in the territory of the hostile Motilone Indians. 



Family CALLOPHYSIDAE 



Genus CALLOPHYSUS Miiller and Troschel 



CaUophysus Muller and Troschel, Horae ichthyologicae, pt. 3, p. 1, 1845). 

 (Type, Pimelodiis macropterus Lichtenstein.) (Ref. copied.) 



