4. IXOLACANTHUS. 43 



Jtussell, i. pi. H8. 



Chsetodon resiiuus, Gronoc. Sysl. ed. Gray, p. 71. 



D.g. A.fg. L.lat.66. 



The prseopercular spine is rather flat, and reaches to the vertical 

 from the posterior margin of the opcrcuhim. The dorsal is produced 

 in adult specimens. Head with two bluish streaks from the oper- 

 culum round the forehead, one through, the other below the eye ; 

 shoulder with a blue ring ; body with six or seven arched blue 

 streaks, radiating from the base of the pectoral ; caudal yellowish. 



East Indian Seas. 



a. Twelve inches long : skin. Ceylon. Presented by E. F. Kelaart, 



M.D. 

 h. Adult : stuffed. Moluccas. Purchased of Mr. Frank. 



c. Eleven inches long : stuffed : bad state. From the Collection of 



the Zoological Society. 



d. Adult. 



e. Adult : discoloured. 



/. Adult : bad state. From the Haslar CoUectioi^ . 

 (J. Adult : skin. From Gronov's Collection. 



2. Holacanthus pseudannularis. 

 Bleaker, Nutuurk. Ti/dschr. Kederl. Lid. 1858, p. 170. 

 D. 15. A. ^. L. lat. 60. 



The height of the body is about one-half of the total length. 

 Head and body with curved, blue, longitudinal and transverse bands : 

 a single streak along the middle of the forehead ; the second from 

 the anterior angle of the branchial aperture before the eye to the 

 vertex ; the third from the inferior margin of the praeoperculuui 

 across its middle to above the eye ; the fotu-th from the ventral spine 

 near the pra)opercular margin to the nape of the neck ; the fifth 

 from the base of the ventral before that of the pectoral to the third 

 dorsal spine ; the sixth from the vent behind the shoulder towards the 

 top of the soft dorsal. Head with two longitudinal bands besides, 

 the lower of which is below the eye ; the scapular region with a blue 

 ring. Body with five oblique longitudinal bands, broader than those 

 described ; tail with a blue cross-bar posteriorly. Anal with two or 

 three curved longitudinal bands ; pectoral with two transverse bands 

 at the base; caudal with a violet margin. (Bl.) 



Sea of Batavia. 



3. Holacanthus arcuatus. 



Crr«y, Zool. Miscdl. p. 33, and Griff. Anim. Kingd. Fishes, p. 32o. pi. Ir^ 



D. J|. A. y^. L. lat. 48. L. transv. 8/26. 



The pra3opercular spine is conical, ajid reaches to the vertical from 

 the posterior margin of the operculum; dorsal and anal fins even. 

 A dark browoi longitudinal band, slightly arched, from the eye to 



