BY W. MACLEAY, F.L.S. 395 



203. HoLACANTnUS SEXSTRIATUS, CllV. & Yal. 



Gimth. Cat. Fislies II., p. 49.— Bleek. Mas Iclith. Chectod., pi. 



10, %. 2. 



D. 13/18-19. A. 3/18. L. lat. 48. L. transv. 7/25. 



The j)ra3opercular spine is smooth, and reaches to the base of 

 the pectoral, the dorsal and anal fins are not produced. Head 

 and ventral fins brown ; the former with a white vertical band, 

 descending from the nape of the neck, between the eye and pree- 

 opercular margin to the spine. Body with six brown vertical 

 bands ; each scale with the centre darker. 



Port Darwin. Cape Grenville (Chevert Exp.) 



204. HoLACANTHUS DuBOULAYi, Gimth. 



Ann. and Mag. Nat. Hist. 1867, Vol, XX., p. 67.— Macl., Proc, 

 Linn. Soe. N.S. Wales, II., p. 352. 



D. 11/23. A. 3 20. 



Prteopercular spine reaches to the vertical from the hind margin 

 of the operculum. Dorsal and anal fins rounded posteriorly. 

 Head and anterior part of the body yellow, the remainder brown. 

 A very broad ocular band, broader than the eye, descends from 

 the neck to the ventral fins. The brown portion of the body 

 is coarsely reticulated with yellow, the lines descending from the 

 back to the belly. Caudal fin and a cuneiform band along the 

 hinder half of the base of the dorsal, yellow. 



North-west Coast. Port Darwin. 



Genus Scatophagus, Cuv. & Yal. 

 Differs from Chcetodon in having a recumbent spine pointing 

 forwards in front of the dorsal fin, and in having four spines to 

 the anal. 



205. Scatophagus argus, Linn. 

 Gunth. Cat. Fishes II,, p. 58.— Bleek. Alt. Ichth. Charted., pi. 1, 



fig. 2. 



