s 
NEW OB LITTLE KNOWN FISHES 
SILURIDiE. 
TACHYSURUS BEOADBENTI sp. nov. 
BROADBENT'S SEA-CATFISH. 
I), i 7 ; A. 17. Depth of body 4| to -if, length of head 2| to 3 
in the total length ; width of head If to If in its length, the upper 
profile undulating and but little oblique. Diameter of eye 6f to 7 
in the length of the head and 2^ to 2f in that of the snout, which is 
broadly rounded or subtruncate and 1^ to li time as wide as long. 
Interorbital region convex, its width 1^ to If time that of the mouth 
and 2 to 2-§- in the length of the head. Premaxillary teeth in a 
continuous band, which is more or less emarginate behind, somewhat 
obtusely pointed at the extremities, and from 4| to 5 times as wide 
as long ; vomerine groups very small and widely separated, deciduous 
with age ; palatine teeth in two large, approximate, subovate groups, 
the inner borders of which are nearly parallel; each group is about 
twice as long as wide, and fully its own length from the premaxillary 
band; mandibular teeth in two short, widely separated, biserial or 
triserial bands. Maxillary barbel 1-| to If in the length of the head, 
extending horizontally nearly to, to, or a little beyond the hinder 
border of the opercle ; postmental barbel f to f of the maxillary 
barbel, inserted near to and but little behind the mental, which does 
not reach to the gill-opening. Cranial shield sparsely granulated, 
sometimes nearly smooth, the granulation not extending forward on 
the interorbital region nor downward to the gill-opening. Nuchal 
shield subtriangular, rather strongly keeled, coarsely granular, the 
granules disposed in regular series, which diverge posteriorly ; its 
greatest width 2i to 3 in its length, which is 3 to 3f in its distance 
from the tip of the snout; outer border nearly straight, the hinder 
notched. Dorsal buckler moderate, subcrescentic, coarsely granular, 
its mesial length 5| to 6i in the nuchal shield, with which it is in 
contact. Fontanelle long and narrow, conspicuous; occipital groove 
not extending backwards to the nuchal shield. Opercles smooth. 
Humeral process smooth, well developed, broadly triangular, extend- 
ing along the proximal f- to f- of the pectoral spine. Distance of 
dorsal fin from the tip of the snout 2- 1 - 1 ^ to 2f in the total length ; 
dorsal spine, granular in front, very feebly serrated behind, the sides 
striated ; its length 1| to If in that of the head. Adipose fin much 
higher than long, its base 1\ to 2f in that of the rayed dorsal, its 
distance from which is Z\ to 3^ in the total length. Anal fin as 
high as or slightly higher than long, with the outer border feebly 
emarginate, its length 2f to 3 in that of the head. Tipper caudal 
