4. HOLACANTHUS. 53 



with curved, concentric, alternately white and bluish transverse 

 lines, the posterior of which forms a complete ring ; on the doreal, 

 caudal and anal fins, the lines are divided and form reticulations ; 

 the posterior half of the caudal is white. 

 East Indian Archipelago. 



29. Holacanthus semicirculatus. 



Holacanthus semicirculatus, Cuv. Sf Val. vii. p. 191. pi. 18-3 ; Bleek. 



Amboina, vi. p. 414 (not Banka, p. 452) ; Voy. Coqu. Zool. Poins. 



p. 173. pi. 30. f. 3. 

 Chsetodon microlepis, Bleeker, Sumatra, ii. p. 257. 



T-K 13-14 A 3 



Scales small. The prajopercular spine is smooth, and reaches to 

 the vertical from the posterior margin of the operculum ; anal and 

 doi-sal fins triangular, not produced. Entirely black, with curved, 

 concentric, alternately white and bluish transverse lines, the white 

 ones being broader ; caudal black, with white cross-streaks. 



East Indian Archipelago ; Polynesia. 



a. Adult. Feejee Islands. Voyage of the Herald. 



b, c. Adult and young. Amboyna. Purchased of Mr. Frank. 

 d. Adult. From the Collection of the Zoological Society. 



30. Holacanthus striatus. 



Holacanthus striatus, RUppell, N. W. Fisehe, p. 32. taf. 10. f. 2 ; Bleek. 



Amboina, vi. p. 414. 

 semicirculatus, Bleeker, Bankn, p. 452 (not Cuv^. 



D.^^ A.i. 



23 -21 



Scales small. The praeopercular spine reaches to the vertical from 

 the posterior margin of the operculum. Black, with curved, concen- 

 tric, alternately white and bluish transverse lines, the white ones 

 being broader ; caudal white. 



Red Sea. 



a. Half-grown. Red Sea. 



31. Holacanthus alternans. 



Cuv. Sf Val. vii. p. 193. 



T) '^ A - 

 JJ. 57- A.-. 



Scales small. Dorsal produced into a long point ;*anal angular. 

 Brown, dotted with darker anteriorly, with lighter posteriorly and 

 on the dorsal and anal fins ; four white veriical lines on the side of 

 the head ; body with ciirved white transverse lines, alternately 

 broader and narrower, those on the tail vertical and straight ; caudal 

 with one or two white transverse lines. {Cuv.) 



Sea of Madagascar. 



