PISCES ABDOMINALES. SILURUS. 
55 
No. CLXX. 
Silurus pinna dor salt postica adiposa ; cirris sex ; cauda sub-lunata. 
The Silurus with an adipose hinder dorsal fin ; six cirri; and a sub-lunated tail. 
Called by the Natives Nalla Jellah. 
1 I 
B. iv. D 8. 0. P. 10. V. 6. A. 29. G. 19. 
The body oblong-ovate, roundish, compressed, adipose. 
The head broad, depressed; the jaws equal, mouth small; teeth, tongue, and palate, as in the last. The 
eyes smaller; the nostrils contiguous, close to the point of the rostrum, the anterior very small; the opercula 
so close, that the branchial membrane cannot easily be got at. A cirrus two inches and a half long, from each 
side of the nose; and four, less than half that length, from the under jaw. The lateral line oblique, not con¬ 
spicuous ; the branchiae, and anus, as in the last. 
The Jins in their situation and shape as described in the last, only that the caudal is here sub-lunate. 
The colour of the head and back a bluish leaden, the belly, throat, and hinder part of the tail, a dull white. 
The whole trunk strewed with small, obscure, dusky dots. The dorsal, ventral, and anal fins have blackish 
margins ; the pectoral and caudal glossy, with a faint yellowish cast. 
Length of the subject, nine inches. 
No. CLXXI. 
Silurus cirris carens; pinna dorsali postica adiposa; cauda trijida; pinnis inermibus; ventrales 
longissimce. 
The Silurus without cirri; the hinder dorsal fin adipose; a trifid tail; the fins without 
spines, and the ventral fins very long. 
Called by the Natives Wan a Motta. 
B. xxiv. D. 12. 0. P. 10. V. 9. A. 15. C. 17. 
The body sub-lanceolate, roundish, compressed, without scales, soft, adipose, white, pellucid. 
The head small, long, declivous, compressed, obtuse, the front depressed, scabrous. The mouth low, trans¬ 
verse, large, wide, no lips. The jaws long, narrow, the upper emarginate, fixed; the inferior somewhat longer, 
boat-shape, moves in a wide range: both are full of teeth. The teeth dissimilar, some of the front and the 
marginal (particularly below) larger, conical, recurve; the others linear, crowded, or in many rows. Tongue 
very small, short, denticulate, immoveable. The palate narrow, denticulate. Eyes remarkably close to the 
rostrum, in a deep, long orbit, very small, orbicular. Nostrils double, near each other, the first smallest, round, 
the posterior oval. The branchial opercula consist of a single soft lamina, open below; the membrane exposed; 
the aperture wide, lateral, and gular. 
The trunk. The back from the shoulders to the spurious fin slightly arched, it then rises a little towards 
the caudal fin, the tail becoming much broader near the fin ; the breast and abdomen almost straight, convex; 
the sides compressed but roundish. The branchiae have acerose denticles. Lateral line high, nearly straight, 
slightly raised. The anus remote, 
