PISCES THORACICI. CILETODON. 
65 
The trunk. The back and belly arched and carinate. The sides and tail compressed. The lateral line 
high, not so much arched as the back, but descending obliquely to the narrow part of the tail, is continued 
waving to the root of the fin. 
The anus nearly middle. 
On each side of the tail where narrowest, there is an oval groove, tinged yellow on the inside, in which is 
lodged a moveable spine, the anterior point a little curve, the other point straight; it is furnished with a 
black sheath, moves as on a pivot, and, when raised, the curve point is turned foreward. 
The Jins. The dorsal and anal long, and both, especially the last, regularly assurgent; the pectoral low, 
broad, pointed above, declivous; the ventral contiguous, pointed in the middle. The caudal lunate. 
The colour generally a shining black, streaked on the head and several parts of the body with longitudinal 
lines of very dark blue. 
The dorsal and anal membranes are leathery, resembling a bat’s wing; the points of the spines white. 
Inches. Lines. 
The length from the rostrum to the caudal fin - - - g o 
of the longest rays of ditto ----- 2 8 
Greatest breadth of the body - -- -- -- - 4 8 
REMARKS. 
They are sometimes brought double the size of the subject described, but seldom appear at the European 
tables, though a very white, firm, and palatable fish. The crescent shape of the tail distinguishes it from 
the Chastodon Nigricans of Linnaeus, 
No. LXXXIII. 
Chastodon caucla sub-arcuata; spinis /pinna dorsi tredecem ; fascia nigrante ad Jaciem; 
corpore lineis obliquis fuscis striato. 
The Celetodon with a tail slightly arched ; thirteen dorsal spines; a blackish band cross 
the face; and the body variegated with oblique yellowish lines. 
Chatodon yagabundus? Linn. S. JV. p. 1 6 5. 
Called by the Natives Painah. 
13 j _ _j_ 
B. V. D. 37. P. 16. V. 6. A. 19. G. 16. 
The body. This species in its form resembles many others of the genus, but the scales are uncommonly large, 
and the head and opercula are squamous, as well as the trunk and fins. 
The head small, much compressed, with a short, blunt, rostrum: the scales smaller than on the trunk. 
The mouth projects more than any of the preceding, but the wide lips, jaws, setaceous teeth, tongue, and 
palate are as usual in the genus. The opercula squamous, and cover, without hiding, the branchial 
membrane. 
The trunk. The back assurgent from the vertex, then arched; the breast and belly are carinate like the 
back, but less arched; the sides and tail much compressed. The lateral line forms a high arch and terminates, 
as in the last fish, at the upper edge of the tail. The anus middle. 
The /ins. The spinous part of the dorsal possesses the ridge of the back, the soft part, the declivity: both 
