Three new Siluroid Fishes. ae 
form, with obtusely pointed posterior processes. Humeral 
process not keeled, rounded behind, extending as far as 
nuchal. Dorsal 1 7; spine as long as head, feebly serrated 
behind, with a filamentous prolongation the length of which 
somewhat exceeds that of the spine. Adipose fin 44 times as 
long as deep, 22 times as long as its distance from dorsal, 
Anal [V 7, rounded. Pectoral spine nearly as long as head, 
moderately serrated on outer edge, very strongly on inner, 
not quite reaching ventral. Latter rounded, not reaching 
anal. Skin smooth, not villose. Greyish above, with small 
scattered darker spots, white beneath; fins whitish, with 
small greyish spots on the dorsal and caudal; dorsal fila- 
ment and upper and lower borders of caudal black; barbels 
white. 
Total length 180 millim. 
A single specimen from the mouth of Lake No. 
Most nearly allied to S. serratus, Riipp., with which it 
agrees in the form of the barbels. Distinguished by fewer 
mandibular teeth, a shorter snout, a larger eye, the absence of 
denticulation on the anterior border of the dorsal spine, the 
very long dorsal filament, and the coloration. 
Synodontis eupterus. 
Depth of body 3 times in total length, length of head 4 
times. Snout rounded, granular near the eyes, as long as 
postocular part of head; interorbital region granular, its 
width not quite 4 length of head; eye supero-lateral, its 
diameter 33 times in length of head; maxillary barbel dis- 
tinctly fringed at the base, 13 length of head; mandibular 
barbels with long slender branches, those of the inner with 
tubercular ramifications. Outer mandibular teeth barely } 
length of eye, about 50 in number. —Oceipito-nuchal shield 
obtusely tectiform, with obtuse posterior processes. Humeral 
process not keeled, obtuse-pointed, extending as far as nuchal. 
Dorsal I 9, remarkable for its great depth, the spine and the 
fine anterior soft rays being prolonged into long filaments ; 
spine longer than head, feebly serrated behind; second soft 
ray 24 as long as head. Adipose fin 23 times as long as 
deep, narrowly separated from dorsal. Anal IV 8, pointed. 
Pectoral spine as long as dorsal, moderately serrated on 
outer edge, very strongly on inner, not quite reaching ventral. 
Latter pointed, reaching origin of anal. Upper lobe of 
caudal much produced. Skin smooth, not villose. Dark 
grey-brown, with a few round blackish spots on the head, 
back, and adipose fin; fins grey, with numerous small round 
black spots ; fringe of maxillary barbels black. 
