HOLOCENTRUS. FISHES. 459 



P. Americanus, Cuv. (Amphiprion Americanus, Sclin.) The only 

 species of the genus. American seas. Reg. An. ii. 282. 



Gen. 58. HOLOCENTRUS, Artedi. 



Snout short, slightly extensible ; teeth small ; scales thick, hard, 

 and dentated ; a strong spine at the base of the preoperculum, 

 and the operculum with one or two at its upper margin ; soft 

 part of the dorsal fin elevated above the spinous part ; oc- 

 ciput without scales, osseous, and striated. 



H. sogo, Bloch. Body compressed and rectangular, silvery red, with 

 longitudinal yellow lines on each side ; fins long, bright red ; eyes 

 large ; tail very much forked. 1 foot long. Inhabits seas of both 

 hemispheres. Shaw, iv. pi. 80. 



H. angularis, Cuv. (Labrus angularis, Lacep.) Twelve spinous 

 and nine articulated rays in the dorsal fin, the articulated rays 

 longest ; five or six rows of small points on each side ; second piece 

 of the operculum notched and angular. Inhabits Indian seas. 

 Lacep. iii. pi. 22. fig. 3. 



H. diadema, Cuv. Body black, with a longitudinal white band ; 

 eleven spinous rays and ten articulated ones in the dorsal fin. In- 

 habits South sea. Lacep. iii. pi. 23, fig. 3. 



Gen. 59- ACERINA, Cuv. Perca, Bloch. 

 Mouth slightly cleft ; teeth small, crowded ; head without scales 

 and furrowed; margin of the preoperculum armed with eight or 

 ten small spines or hooks ; a pointed spine at the operculum, 

 and another at the shoulder bone ; margin of the scales den- 

 tated. 



A. cernua, Cuv. The Ruffe. Head thick and flattened ; body long 

 and slimy, subolivaceous, with numerous dusky spots ; first fifteen 

 rays of the dorsal fin hard and pointed ; tail forked. 8 inches long. 

 Inhabits rivers of Europe. B Pen. Brit. Zool. iii. 350. 



A. Schraitzer, Cuv. Body somewhat elongated, brownish, with four 

 longitudinal black lines on each side ; abdomen silvery. 10 in- 

 ches long. Inhabits the Danube and its tributary streams. Block, 

 pi. 332, fig. 1. 



Gen. 60. STELLIFERUS, Cuv. 



Head naked and cavernous ; suborbitaries, preoperculi, and oper- 

 culi furnished with spines; snout tumid; teeth small and crowd- 

 ed ; four rays in the branchial membrane. 



S. Capensis. (Bodianus stellifer, Bloch.) Head short and truncated ; 

 iris white, surrounded with a stellated silvery ring, body com- 

 pressed and silvery ; back and fins yellowish brown ; tail ovate. 

 5 inches long. Seas near the Cape of Good Hope. Block, pi. 231. 



Gen. 61. SCORP^NA, Schn. 

 Head rough with spines, chiefly above the orbits, on the occi- 



