208 PROCEEDINGS OF THE NATIONAL MUSEUTVl vol.94 



101614, a 173-inin. specimen collected by Niceforo Maria in the Rio 

 Pamplonita, near Ciicuta, Colombia (Catatumbo system). 



Description. — Measurements of the holotype and one paratype were 

 carefully made, and the data, expressed in hundredths of the standard 

 length, are recorded in table 3. 



The following counts were made: Doi-sal rays I, 6; I, 6; anal v, 8; 

 V, 8; pectoral I, 10 and I, 11; pelvic i, 5; i, 5; caudal with branched 

 rays — ; 15. Additional counts are recorded in table 2. 



Upper surface of head depressed; the supraoccipital process elevated 

 along the midline and touching the predorsal plate; eye with a free 

 margin; premaxillary band of teeth broad with rounded corners later- 

 ally; no teeth on vomer or palatines; snout projecting beyond lower 

 jaw a distance a little greater than width of lower lip ; maxillary barbel 

 extends anj^where from rear of anal fin base to middle of length of 

 caudal fin; outer mental barbel reaching a little beyond the base of 

 pelvics and inner mental barbel to middle of pectorals; bases of outer 

 mental barbels a trifle behind base of inner mental barbels; anterior 

 edge of pectoral and dorsal spmes smooth or nearly so ; posterior sides 

 of pectoral spine strongly toothed, that of dorsal weakly serrated or 

 only rough with age; giU rakers K diameter of eye; rear margins of 

 dorsal, anal, pectoral, and pelvic fins a little concave; caudal fin deeply 

 forked; minute papillae on head; body compressed posteriorly; total 

 length of adipose fin a little shorter than length of head and longer 

 than distance from base of dorsal to adipose origm by the depth of 

 the caudal peduncle; dorsal spine l%in distance from tip of snout to 

 dorsal origin, pectoral spine reaching three-fourths the way to pelvic 

 insertion; dorsal spine not quite reaching adipose origin; upper 

 caudal lobe a little longer than lower lobe. 



Co^or.— Black spots occur everywhere on upper surface, even on 

 top of the head and adipose and dorsal fins in the type; pau-ed fins 

 and anal with their bases yellowish; underside of body whitish; caudal 

 fin plain; peritoneum pale. In specimens up to 190 mm. the color 

 pattern consists of black spots more or less separated by pale streaks, 

 one extending from predorsal plate obliquely downward to lateral 

 line, thence to caudal fin base, and one along middle of upper sides; 

 often the top of head and all fins are plain in color, and in the smallest 

 specimens before me the black spots disappear or fade out posteriorly. 

 Named navarroi in honor of Rafael Navarro, of Maracaibo, who 

 acted as my assistant in collecting many of the fishes herein reported 

 upon from the Maracaibo Basin. 



Remarks. — This new subspecies, grosskopjii navarroi, may be separ- 

 ated from grosskopjii grosskopjii of the Magdalena system by the shorter 

 adipose fin. Other differences are indicated in the key and in the 

 tables. 



