CLASS IV. ORDER Ili. §5 
Guxropon, (sheep-head, unicorn fish,) head 
small ; mouth also small ; teeth close set, flexile, 
setaceous ; gill-membrane 3, 4, 5 or 6-rayed 5 bo- 
dy bread, compressed, generally banded ; dorsa! 
and anal fin thick, fleshy and scaly at the base. 
Acanruurus, teeth small, lobate (in mest spe- 
cles) ; tail aculeate on each side ; habit and gen- 
eral appearance as the Chetoden. 
Eaquss, (knight-fish,) teeth in several rows; 
hody banded. 
Tricnopus, body compressed; ventral fins 
with an extremely long filament. 
Scarus, Jaws beny, divided in the middle, 
crenated on the edge ; teeth connate and conglom- 
erate. 
Srarus, teeth strong; front teeth in a single 
yOW, in some species, in 2, 3 or 4 rows in others ; 
grinders (in most species) convex, smooth, dispos. 
ed in ranges, so as to form a kind of. pavement ; 
lips thick ; gill-covers unarmed, smooth, scaly. 
Gompuosus, Jaws lengthened into a tubular 
snout; teeth small; those in front larger. 
Lazsrus, (old-wife,) teeth strong and suba- 
cute ; grinders sometimes as in Sparus, convex 
-and crowded ; lips thick and doubled ; rays of 
the dorsal-fin, in some species, elongated into soft 
processes ; gill-covers unarmed and scaly. 
OpnHICErHALUS, head coated with dissimilar 
scales ; body elongated. 
Loncuvrus, head scaly ; ventral-fins separate ; 
tail lanceolate. : 
Screna, head scaly ; dorsal-fins two, seated in 
a furrow, into which they may occasionally with- 
draw ; gill-membrane six-rayed, 
Perca, (perch, sed! ruffe,) teeth sharp ; gill 
