470 CAIUNGIDiK. 



3. Nauclerus brachycentrus. 



Cuv. 8f Veil. ix. p. 252. 



The height of the spinous dorsal is one-fifteenth only of that of 

 the body. Prasoperciilum with a single very short spine at the 

 angle. Body mth seven blackish cross-bands, disappearing on the 

 belly ; caudal with a band. (Cuv.) 



Indian Ocean or Molucca Sea. 



4. Nauclerus triacanthus. 

 Cuv. ^ Val ix. p. 253. 



»-3|^.. A.2|l. 



Proeoperculum -wdth a very short spine at the angle ; the bands on 

 the back disappear on the sides ; caudal with two deep-black spots. 

 {Cuv.) 



Atlantic. 



5. Nauclerus annularis. 

 Cuv. <^- Val. ix. p. 254. 



Body with six black cross-bands encircling the beUy, and united 

 with those of the other side ; caudal with a small blackish spot. {Cuv.) 

 Atlantic between St. Helena and the Cape. (Gulf of Bengal.) 



6. Nauclerus leucurus. 

 Cuv. <^ Val. ix. p. 255. 



D.5|±. A.2|±. 



The body is higher than in N. comprcssus. Bauds of the body 

 narrow ; caudal without any spot. {Cuv.) 

 Atlantic between St. Helena and the Cape. 



10. POETHMEUS. 

 Porthmeus, Cuv. 8f Val, ix. p. 255. 



Body oblong, compressed, naked ; cleft of tlie mouth wide, with 

 the lower jaw prominent. The two dorsals continuous at the base, 

 and separated by a notch ; no separate finlets ; anal fin witli three 

 spines, the two anterior ones rather separate. Lateral line Axithout 

 any armature. Small teeth in the jaws, on the vomer and the pala- 

 tine bones. Prasoperculum serrated. Branchiostegals seven; air- 

 bladder present. Pyloric appendages numerous. 



A genus but little known. From the Indian Ocean and the Cai)o 

 of Good Hope. 



