4. nOLACANTHUS. 51 



22. Holacanthus xanthometopon. 

 BUeher, Sumatra, ii. p. 258. 



D.H A. A. L.lat.48. 



The praeoiJerculai- si)ine is more than one-half shorter than the 

 head ; the dorsal and anal fins are rounded posteriorly. Head blue ; 

 the cheeks and oporcles with numeroiLs golden, black-edged dots ; 

 chin and lips lineolated with black. A band between the orbits 

 orange-coloured. Body -sdolet ; tail yellow : each scale on the sides 

 with a blue spot in the centre and a golden margin ; an orange- 

 coloured spot on the scapulary region. Dorsal, caudal, and pectoral 

 fins yellow, edged with ^'iolet ; the soft dorsal posteriorly with a large 

 round black, blue-edged spot ; the anal with numerous blue, black- 

 edged spots. {Bl.) 



Sea of Sumatra. 



23. Holacanthus xanthurus. 



Beniu'tt, Proc. Comm. Zool. Soc. 1832, p. 18.3. 



D. 1^. A. ^. L. lat. 46. L. transv. 7/22. 



The praeopercular spine is smooth, and reaches to the base of the 

 pectoral; the dorsal, and anal fins rounded posteriorly. Brownish 

 (in spii'its), each scale with a light crescent-shaped streak ; caudal 

 yellow. 



Sea of Ceylon. 



a. Fine specimen. Ceylon. Collected by Dr. Sibbald. — Tji^e of 

 the species. 



24. Holacanthus vrolikii. 



Bleeker, Amhoina, iv. p. 3.39. 



D. j|. A. ^. L. lat. 46. L. transv. 6/19. 



The prseopercular spine is smooth, and reaches to the base of the 

 pectoral ; the dorsal and anal fins are rather rounded posteriorly. 

 Uniform greyish -brown, gradually becoming black posteriorly ; the 

 margin of the operculum blackish. 



Seas of Ceram and AmbojTia. 



a. Fine specimen. Amboyna. Piu'chased of Mr. Frank. 

 h. Fine specimen. Ceram. Purchased of Mr. Stevens. 



25. Holacanthus nox. 



Bleeker, Amboina, iv. p. 338. 



D.^. A.-^. L.lat.48. 



10 18 



The prseopercular spine is about as long as the diameter of the 

 eye; the dorsal and anal fins rounded posteriorly. Black. {Bl.) 

 Sea of Amboyna. 



e2 



