SOUTH AMERICAN NEMATOGNATHI. 303 



center of eye, but continuing as a groove backward as 

 far as the posterior margin of the eye. Occipital process 

 scarcely as long as its basal width, coossified with the 

 dorsal plate, its surface ridges somewhat granular. 



Eye 1 in snout, 3^ in head, 2 in interocular. 



Bony portion of the maxillary barbel | its whole 

 length, extending half its length beyond the rictus, its 

 lower edge very minutely crenulate near its tip. Snout 

 short as in brevis, about 2 in interocular. Upper jaw 

 everywhere narrowly projecting, the intermaxillary band 

 of teeth about as in brevis. 



Lateral line zig-zag, with branches extending from 

 the angles. 



Distance of dorsal fin from snout 2| in the length; the 

 dorsal spine Ij in head, roughened in front, short teeth 

 on its inner margin except near base. Interdorsal space 

 2i in the length; adipose fin high and short. 



Caudal forked, the lobes pointed, 1 in the head. 



Origin of anal | nearer base of caudal than to the 

 rictus. 



Ventrals reaching the anal 1-| in head. 



Pectoral spine like that of brevis, except a little shorter, 

 li in the head. 



Purplish on the back; head dotted above and below 

 with purple; upper lip dark purple, the lower very nar- 

 rowly margined; a rather obscure lateral band formed of 

 dark dots; minute punctulations above the anal fin; all 

 tlje fins more or less dotted with purplish, the caudal 

 narrowly edged with that color. 



Head 3|; depth, below dorsal, 6, above anal, 5; D. I, 6; 

 A. 30. 



One specimen .095 m. Exact locality unknown. 



