BY J. DOUGLAS OGILBY. 15 



to the 12th body-scale. Ventral as long as the pectoral, 

 extending to the vent. 



Colors (after long immersion in alcohol). Pale rufous, 

 with five rather wide dark longitudinal bands following 

 the curvature of the back above the lateral line and twelve 

 much narrower linear bars below ; a large black elliptical 

 spot covers the upper middle portion of the side from 

 above the middle of the pectoral fin to below the anterior 

 third of the soft dorsal ; about two thirds of it are below 

 the rest above the lateral line, and the two lower longi- 

 tudinal bands and three upper bars are lost in it ; a large 

 oval black spot on the side of the tail, partly below the 

 end of the soft dorsal and partly on the peduncle, across 

 the upper edge of which it extends but does not reach 

 the lower border. Ocular band running from a short 

 distance in front of the dorsal through the eye to the inter- 

 opercle, darkest superiorly, and somewhat interrupted 

 by a lighter spot where it leaves the nape ; opercle with 

 several large dark brown spots. Soft dorsal and anal 

 fins each with a narrow dark in^ramarginal band, which 

 extends forward on the former to the posterioi rays[; 

 caudal fin with a wide pale brown basal and a dark brown 

 subarcuate median band. 



Described from a Moreton Bay specimen, measuring 

 75 millimeters, in the collection of the Queensland Museum. 



Closely allied to Megaprotodon plehius*, from which 

 it differs chiefly in the color markings. The lateral blotch 

 bears a close resemblance to that of Chcetodon speculum'f 

 as figured by BleekerJ, but is more pointed at either end. 



TRIACANTHID^. 



TBI ACANTHUS FALCANALIS sp. HOV. 



D. V or vi— 22 or 23 ; A. 18 ; P. 16. Depth of body 

 2-75, length of head 3-35, of snout 4.85, of first dorsal spine 

 3-55, of ventral spine 4-3, of pelvic bone 5-, of soft dorsal 

 3-55, of anal 5-5, of caudal 3-85, of caudal peduncle 5-1 

 in length of body. Diameter of eye 3-85, width of inter- 



* Chcetodon plebeius Gmelin, Syst. Nat., 1789, i, p. 1269. In Turton's 

 Iransiation, 1806, no mention is made of this species. 



t Chcetodon speculum (Kuhl & v. Hasselt) Cuvier & Valenciennes, 

 Hist. Nat. PoisB, vii, 1831, p. 73. 



t Atlas Ichth, pi. ccclxxv, fig. 3. 



