Fish of the Tai-Hii. 
3*7 
SILURIDAE. 
Parasilurus asotus (Linne). 
Head 4^ ; depth 5^ ; 1). 1, 4 ; A. 81 ; snout 3^ in head ; eye 8^ ; mouth widtli 2 ; 
interorbital 21^0 ; caudal i,^ ; pectoral i|; ventral 2-J ; length of dorsal 2| ; 
maxillary barbel not quite reaching opposite dorsal origin. Length 225 nun. 
One example. 
Fluvidraco fluvidraco (Richardson). 
Head 3^ ; depth 3^ ; D. I, 7 ; A. v, 16 ; snout 3 in head ; eye 4f ; mouth width 
2| ; interorbital 2? ; head width i ^- ; maxillary not quite reaching eye. Maxillary 
barbel about reaches hind edge of gill-opening, nasal barbel only extends little 
behind eye. Outer mental barbel reaches pectoral origin ; inner mental barbel | of 
outer. First dorsal ray li in head ; .spine i|, front edge smooth and 4 weak 
antrorse serrae on hind edge. Fourteenth anal ray 2^ in head ; adipose fin i J ; cau- 
dal I ; pectoral spine if, front edge finely denticulated, inner edge with 8 antrorse 
serrae , humeral process 2-1-0 ; least depth of caudal peduncle equals its length or 3| 
in head. Along back and sides about 4 or 5 obscure dark brownish blotches. 
Fins more or less darker terminally. Length 90 mm. 
One example. 
Liocassis longirostris (Oiinther). 
Head 3^ ; depth 5^- ; L). I, 7; A. v, 12 ; P. I, 9, i ; V. i, 5 ; snout 2? in bead; 
eye, 13 ; mouth width 2I : interorbital 3^. 
Body long, compressed, deepest at dorsal origin, where back little elevated, 
caudal peduncle compressed, least depth 2| its length or 4^ in head. 
Head large, width its length. Snout conic, depressed, length | its width at 
front of e5^es. Kye .small, without free lids, hind edge little less than eye-diameter 
before center in head length; about 5 in snout, 4 in interorbital; mouth broad, 
transverse, preoral length half its width. Teeth slender, conic, in broad ])ands, 
upper little larger. Broad transverse band over front of vomer, much wider than 
front-band in upper jaw, small slender maxillary barbel, ih in snout, reaches 
opposite hind edge of eye. Outer mental barbel same length : inner of outer. 
Very short nasal l)arbel little shorter than eye. 
Nostrils small, about level with eye at least | in snout length. Interorbital 
elevated convexly. Median fontanel extends backward about | in head. Occipital 
bridge complete with dorsal buckler, surfaces of all finely striate. 
Ciill-opening forward midway in head. Gill-rakers 4 + 12, lanceolate, small, i| 
in gill-filaments, which equal I'i eye diameters. Isthmus wide. 
Skin smooth. Lateral line distinct, median along side, complete. vSurface of 
humeral process little roughened, striae rather obsolete. 
Dorsal origin little nearer siiout tip than hind edge of adipose fin ; spine long, 
compressed, with fine reticulated striae, with 20 strong antrorse denticles along 
hind edge, spine length ij in head ; first branched ray Adipose fin rather long, 
base about half of head and begins .slighth" nearer dorsal origin than caudal base. 
