REVIEW OF THE QUEENSLAND POMACANTHINAS.—OGILBY. 101 



or less distinctly angulated. Caudal usually rounded, more rarely emarginate, 

 with the outer rays produced. Anal similar to the soft dorsal, with iii 15 to 22 

 rays. Pectoral obtusely pointed, with 15 to 20 rays. Ventrals inserted below 

 or slightly behind the pectoral base, close together, with a moderate or strong 

 spine and 5 rays, the outer of which is usually produced, without accessory 

 scale. Gill-openings wide; gill-membranes separate, narrowly attached to the 

 isthmus ; branchiostegals six ; pseudobranc'hise well developed ; gill-rakers minute ; 

 air-bladder large, posteriorly bifurcate. Pyloric caeca numerous. 



Etymology: — Greek, oAoz, whole or perfect; aKavda, a spine. 



Coastal fishes of small or moderate size from the Indian, Pacific, and 

 Western Atlantic Oceans. About 10 species known. 



Key to the Queensland Species. 

 a 1 . Scales moderate, in less than 55 transverse series (Holacanthus). 

 b l . Habit holoeentriform ; lepidosis without squamulae. 



c 1 . Eye longer than the snout ; lateral line incomplete ; dorsal with 14 spines, the soft 

 portion obtusely pointed . . . . . . . . . . . . flavissimus. 



6 s . Habit chfetodontiform ; lepidosis with scattered squamulse. 



d l . Eye about as long as snout ; lateral line incomplete ; dorsal with 15 spines, the soft 

 portion acutely pointed ; pectoral with 16 or 17 rays . . . . . . bicolor. 



d". Eye much shorter than snout ; lateral line complete ; dorsal with 13 spines, the soft 

 portion obtusely pointed ; pectoral with 19 spines . . . . . . sexstriatus. 



a". Scales small, in more than 70 transverse series (Acanthochcetodon). 

 e 1 . Dorsal fin with 14 spines ; lateral line complete. 



/'. Eye much shorter than snout ; soft dorsal acutely pointed .. .. imperator. 



/-. Eye rather longer than snout ; soft dorsal rounded or obtuselj r pointed 



semicirculatus. 



HOLACANTHUS FLAVISSIMUS Cuvier & Valenciennes. 

 Holacanthus flavissimiis Cuvier & Valenciennes, Hist. Nat. Poiss., vii, 1831,. p. 197 ; Jordan 



& Seale, Bull. U.S. Bur. Fisher., xxv, 1905, p. 348. 

 Holacanthus luteolus (Parkinson) Cuvier & Valenciennes, ibid., p. 198. 

 Holacanthus cyanotis Gunther, Brit. Mus. Catal. Fish., ii, 1860, p. 517 ; id., Fisch. d. Sixdsee, 



pt. 2, 1874, p. 52, pi. xl, fig. A. ; Ogilby, Mem. Queensl. Mus., i, 1912, p. 54. 

 Holacanthus monophthalmus Kner, Sitz. Akad. Wien, lvi, 1867, p. 714, fig. 2 (juv.) ; id., ibid., 



lvii, 1868, p. 16. 

 Holacanthus ocularis Peters, Mon. Akad. Berlin, 1868, p. 147. 

 Holacanthus sphynx de Vis, Proc. Linn. Soc. N. S. Wales, ix, pt. 3, 29 Nov. 1884, p. 457. 



Type localities: — Ullie Island, Caroline Group (flavissimiis) ; Tahiti, 

 Society Group (luteolus) ; Aneiteum, New Hebrides Group (cyanotis) ; Raiatea, 

 .Society Group (monophthalmus) : South Sea (ocularis) ; Coast of Queensland 



(sphynx). 



Depth of body 1-8 in its length ; dorsal contour slightly more elevated 

 4han the ventral, its anterior profile from snout to nape evenly convex and 

 •decreasingly acclivous, thence rising slightly by a further convexity to the 7th 

 dorsal spine, beyond which it descends in a long gentle curve to the caudal 



