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PROCEEiDINGS OF THE NATIONAL MUSEUM 



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tance from snout to dorsal origin 42.1 (41.8; 41.6); snout to anal 

 origin 72.5 (75.8; 74.5); snout to adipose origin 76.0 (71.4; 75.5); 

 snout to pelvic insertion 52.8 (53.8; 55.4); snout to pectoral insertion 

 30.8 (31.9; 30.8); snout to anal origin 59.8 (62.6; 63.4); length of 

 dorsal spine 10.8 (11.9; 7.50); length of pectoral spine 15.4 (16.5; 

 13.2); longest branched ray of pelvics 15.9 (17.8; 14.9); longest 

 branched ray of pectorals 19.1 (18.7; 16.1); longest branched ray of 

 dorsal 18.2 (19.8; 18.5); longest branched ray of anal 15.9 (16.5; 

 15.5) ; longest ray of upper lobe of caudal fin 25.2 (28.6; 20.1) ; longest 

 ray of lower lobe of caudal fin 24.3 (25.5; 19.4). 



The following counts were made, respectively: Dorsal rays I, 6 (I, 6; 

 I, 6); anal iv, 8 (v, 8; iv, 7); pelvic i, 5— i, 5 (i, 5— i, 5; i, 5— i, 5); 

 pectoral I, 6—1, 6 (I, 6—1, 6; I, 6—1, 6); branched rays of caudal 

 12 (13; 13); gill rakers on first arch— (3 + 7; 3+6). For additional 

 counts see table 1. 



Table 1. — Counts made on species of Zungaro and Pseudopimelodus from the 



Maracaibo Basin 



Head depressed, its width across base of pectorals about 1.1 to 1.2 

 in its length; body compressed at caudal peduncle; adipose fin with 

 a short base; anal base short, about equal to snout; origin of adipose 

 fin over origin of anal fin or a trifle in front of the latter; insertion of 

 pelvics under posterior end of dorsal fin base; margin of eye not free, 

 the eye small, 3K to 5 times in interorbital space; gill membranes 

 extend far forward, attached to isthmus without a free fold; nostrils 

 wide apart, the anterior one tubular, near front of snout, the posterior 

 nostril funnel-shaped with a minute point or barblet on the anterior 

 edge of the membranous rim; teeth villiform, in a wide band on den- 

 taries and premaxillaries ; at the lateral ends of the premaxillary band 

 is a posteriorly projecting arm on adults, but only angular to rounded 

 in the young ; no teeth on vomer or palatines ; the predorsal plate does 

 not meet the supraoccipital process; dorsal surface of head fleshy, 

 the bones covered with thick skin; gill rakers short, pointed, two to 

 three above and six to eight below the angle of first gill arch; both 

 jaws equal, mouth terminal, gape wide; pectoral spine about 2 to 2% 

 in the head, with long teeth on front and rear margins, those on front 

 margin antrorse distally, and on inner margin retrorse; dorsal spine 



