112 MEMOIRS OF THE QUEENSLAND MUSEUM. 



.spine at the angle the hinder border usually serrated. One dorsal tin, with xi 

 to xiii 18 to 21 rays; spines strong, pungent, graduated; soft portion shorter 

 than the spinous, scaly, with rounded outline. Caudal rounded with 15 branched 

 rays. Anal similar to soft dorsal, with iii 17 to 19 rays, the spines graduated. 

 Pectoral .small and obtusely pointed, with 17 to 20 rays. Ventrals inserted 

 below the pectorals, close together, well developed, with i 5 rays, the spine long 

 and strong, the outer ray longest, without accessory scale. Gill-membranes more 

 or less broadly attached to the isthmus. 



Etymology : — Greek, x fUT7 7> a bristle ; 68wv, a tooth ; wrA-a, arms or implements 

 of warfare. 



Uang\ : — Chaetodontiform fishes of small or moderate size from the Western 

 Pacific Ocean. Aboul seven species are recognized. 



Key to the Queensland Species. 

 a 1 . Depth of body 1-4 in its length ; D. xi 21, the soft portion two thirds of the length of the 



spinous . . . . . . . . . . . . . . . . . . . . dubouleyi. 



a". Depth of body about half its length ; D. xiii 19, the soft portion nearly as long as the 



spinous . . . . . . . . . . . . . . . . . . . . conspicillatus . 



CHSTODONTOPLUS DUBOULEYI (Giinther). 3 



Holacanthus duboulayi Giinther, Ann. and Mag. Nat. Hist. (3) xx, 1867, p. 67 ; Macleay, Proc. 

 Linn. Soc. N. S. Wales, ii, pt. 4, 1878, p. 352 ; Klunzinger, Sitz. Akad.Wien, lxxx, i, 1879, 

 p. 361 ; Macleay, ibid., v, pt. 3, 1881, p. 395 (after Giinther) ; McCulloch, Rec. Austr. 

 Mus., ix, pt, 3, 1913, p. 360, pi. xiv ; id., Rec. West. Austr. Mus., i, pt. 3, 1914, p. 222. 



Chcelodontoplus duboulayi Bleeker, Arch. Neerl. Sci. Nat., xii, 1877, p. 22. 



Type locality: — North-West Coast of Australia. 1 



Depth of body 1-1 in its length; dorsal and ventral contours about equally 

 elevated but not symmetrical, the former linear and strongly acclivous to above 

 the anterior border of the eye, thence rising abruptly in a high convexity to 

 about the 6th dorsal spine, beyond which it descends in a longer and more gentle 

 curve to the caudal peduncle ; ventral contour slightly concave between the lip 

 and the throat, thence evenly rounded to the peduncle, the least depth of which 

 is 7-2 in the length of the body. Width of head 1-55 in its length, which is 1-2 

 in its depth and 3-85 in the body-length. Diameter of eye 1-15 in the length of 



3 While fully recognising the value of the law which strictly enjoins that there shall be no 

 tampering with an author's original orthography, there are, I think, cases where a certain amount 

 of relaxation from the strict letter of the law is not merely advisable but incumbent upon us. 

 One such case is that of a palpable printer's or pen error, of which the well-known substitution of 

 Orycnus for Orcynus is an example ; another such is the incorrect spelling of a proper name, 

 whether through ignorance, carelessness, or accident. Two examples of this latter occur at once 

 to me among Australian Fishes, namely duboulayi Giinther and philippi Schneider, which should 

 respectively be altered to dubouleyi and phillipi, so that those whose names are thus honored 

 may be correctly designated. 



4 Mr. du Bouley forwarded collections to the British Museum from both Roebuck Bay and 

 King Sound, and we may, therefore, assume that one or other of these inlets represents the type 

 locality. 



