IV. ORDER III. 85 



C5HJ&TODON, (sheep-head, unicorn fish,) head 

 small ; mouth also small ; teeth close set, flexile, 

 setaceous ; gill- membrane 3, 4, 5 or 6-rayed ; bo 

 dy broad, compressed, generally banded ; dorsal 

 and anal fin thick, fleshy and scaly at the base. 



ACANTHURUS, teeth small, lobate (in most spe 

 ies) ; tail aculeate on each side 5 habit and geiv 

 eral appearance as the Chsetodon. 



EQUES, (knight-fish,) teeth in several rows: 

 body banded. 



TRICHOPUS, body compressed; ventral fins 

 with an extremely long filament. 



SCARUS, jaws bony, divided in the middle,, 

 crenated on the edge ; teeth connate and conglom- 

 erate. 



SPARUS, teeth strong ; front teeth in a single 

 row, in some species, in 2, 8 or 4 rows in others ; 

 grinders (in most species) convex, smooth, dispos- 

 ed in ranges, so as to form a kind of pavement j 

 lips thick ; gill-covers unarmed, smooth, scaly. 



GOMPHOSUS, jaws lengthened into a tubular 

 snout ; teeth small ; those in front larger. 



LABRUS, (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. 



OPHICEPHALUS, head coated with dissimilar 

 scales ; body elongated. 



LONCHURUS, head scaly ; ventral-fins separate i 

 tail lanceolate. 



SCI^ENA, head scaly ; dorsal-fins two, seated m 

 a furrow, into which they may occasionally with- 

 draw ; gill-menibrane six-rayed. 



PERCA, (perch, basse, ruffe,) teeth sharp ; gill 

 8 



