Tachysuridac. 
Hexanematichthys caelatus (Valenciennes). 
Head 3%; depth 5; D. I, 7; A. v, 17; snout 2Z in head; 
eye 5; maxillary 3; interorbital 2z. 
Body well compressed, caudal peduncle with least depth 
2 in its length or 32 in head. Head width 1 1/5 its length. 
Snout convex, length 2/3 its width. Eye moderate, hind edge 
about midway in head as seen in prifile. Mouth wide, 
gape extends slightly beyond hind nostril. Upper jaw pro- 
trudes. Jaws with broad bands of fine pointed teeth; 
ovate patch of vomeropalatine teeth, coarser, rather obtuse, 
> 
shout, width of each patch greater than bands in jaws, though 
well seperated at vomer. Maxillary barbel slightly 
depressed pectoral tip; outer mental barbell to middle of 
pectoral spine; inner mental barbel = to pectoral origin. 
Nostrils large, together, frenum about first 2/5 in snout 
profile. Interorbital elevated convexly, broadly depressed 
medially. Cranium strongly rugose-striate. Broad fontanel 
behind eye to apex which forms at supraoccipital. 
rakers 6 - 10, lanceolate, about 3/5 of filaments, 
1 1/5 in eye. Fin spines (tip broken) edged with bony 
ules basally and antrorse serrae terminally. 
about midway between snout tip and adipose fin origin. Lat- 
ter little nearer last dorsal ray base than that 
length equals interorbital. Anal gin about mi 
spinous dorsal origin and caudal 
length (tip damaged) about 1 1/6 in head. Pectoral about S/S 
to ventral, latter inserted well behind dorsal base or gsbout 
