358 MEMOIRS OF THE CARNEGIE MUSEUM. 



1729, C. M. ; 12111, 1. U. M., type and paratypes, three, 33-35 mm. (Konawaruk.) 

 Head 5.33; depth 7; D. 8; A. 7; eye 1 in snout, 3.75 in head, 1 in space between 

 the eyes. Width of head equal to its length; snout semicircular in outline, the head 

 depressed; mouth very wide, its width equal to the length of the head less half the 

 snout; upper jaw with three series of teeth; teeth of the two outer series conical, 

 those of the inner series broad, removed from the others, forming a solid palisade; 

 no labial teeth; lower jaw with an outer series of long, curved, claw-like teeth in the 

 lip, and four series in the jaw, of which the first is short, near the middle, the second 

 extends farther to the sides, the third is longest, extending from- the middle to the 

 side of the jaw, the fourth is shorter again and confined to the sides, not reaching 

 the median line of the jaw. Interopercle with nine claw-like erectile spines; opercle 

 somewhat prolonged, carrying a bunch of nine spines similar to those of the pre- 

 opercle above and behind the gill-opening. Gill-opening small, entirely above the 

 level of the middle of the pectoral; outer maxillary barbel about as long as the eye, 

 the inner one minute. Pectorals partly adnate; ventrals small, free, reaching anal; 

 dorsal about equal to the anal and but slightly farther forward. 



"Light, with numerous chromatophores more or less aggregated in places; a 

 black spot on base of caudal." 



The only specimens known were killed with hiari poison in a small pool of 

 back-water from the Essequibo. 



Genus XII. Vandellia 39 Cuvier & Valenciennes. (Plate XXXVIII.) 



Genus XIII. Urinophilus Eigenmann. 



Vandellia Cuvier & Valenciennes, Hist. Nat. Poiss., XVIII, 1846, p. 386, pi. 



547. 



Type of Vandellia. — Vandellia cirrhosa Cuvier & Valenciennes. 



Long, slender fishes with small inferior mouth; a few teeth in a single series in 

 the middle of the upper jaw; peculiar, claw-like teeth on the end of the maxillary 

 in some species, probably all of them; teeth on the mandible in some species, none 

 in other species; the mandibular rami not meeting, separated by a wide membrane; 

 opercular spines directed obliquely upward and backward, interopercular spines 

 directed downward and backward ; gill-opening small ; no nasal or mental barbels, 

 the lower of the barbels at angle of mouth very minute ; first pectoral ray not pro- 

 longed in a filament ; ventrals very much nearer to caudal than to tip of snout ; origin 

 of the anal behind that of the dorsal. 



39 In honor of Domingo Vandelli, professor of natural history at Lisbon, who sent the types of the 

 genus to Lacepfcde. 



