REVIEW OF THE QUEENSLAND F0MACANTIIINM.--0G1LBY. 113 
the snout, which is 2*6 in that of the head ; interorhital region a little wider and 
two thirds higher than the eye-diameter. Jaws equal, maxillary extending to 
below the anterior nostril. Preorbital without spines, its width 1*15 in the 
eye-diameter. Hinder limb of preopercle vertical, serrated or rugose, the spine 
24 in the length of the head and reaching to below the pectoral axil. 
Scales minute and strongly ctenoid, the entire exposed portion coarsely 
spinulose. Lateral line interrupted, the upper portion terminating close in front 
of the last dorsal rays, the lower eommeneing below the middle of the soft dorsal 
and extending straight to the root of the caudal, its tubes widely separated. 
Dorsal fin originating above the vertical limb of the preopei'cle, with xi 21 
rays, the soft portion only about one twelfth shorter than the spinous; spines 
graduated, the 1st well developed, 2-25 in the last, which is a little less than the 
4th and longest ray and nearly one fourth of the body-length ; outline of soft 
fin evenly convex. Caudal fin rounded, the middle rays as long as the outer and 
4-35 in the length of the body. Anal with iii 19 rays, originating below the 1st 
dorsal ray, the 1st spine half as long as the 3rd, which is as long as the anterior 
rays and 3*7 in the body-length; soft anal similar to but a little longer and 
higher than the soft dorsal. Pectoral with 18 rays, its length 4*3 in that of the 
body; 4th ray longest, extending to below the 8th dorsal spine. Ventral a little 
longer than the pectoral, its spine 1-35 in the outer ray, which is slightly 
produced, 3-8 in the body-length, and reaches to the anal. 
Gill-rakers 3 -|- 13, all short and triangular. 
Purplish brown; a broad yellow band from before and below the three 
anterior spines across the opercle and base of the pectoral, to between the origin 
of the ventral and the vent; a second band from the sixth dorsal spine to the 
peduncle, increasing in width from the front, and about evenly divided between 
the body and fin, is sometimes continued across the pediuicle, the extension being 
brown-si)otted. Sides of head and breast lighter than the body, uniform or dark- 
spotted, lips and chin yellow. Dorsal and anal fins purple, Avith numerous pale 
blue, wavy, often interrupted horizontal lines; caudal, pectoral, and ventral fins 
yellow. 
Vuriaiions : — IMcCulloch {loc, cit.) writes — ''Klunzinger and IMacleay have 
noted considerable variation in the arrangement of the lighter markings on the 
broad brown body-band. These may form either a network Avdth the lines 
descending from the back to the belly, or be longitudinal and nearly straight. 
In others, again, as in that figured, tiiey may b(‘ absent and represent(‘d only by 
a few irregular spots near the edges of the otheTwise uniform brown surface. 
The lines on the fins are characteristic, but ai)pear dark violet in some specimens 
and pale blue in others; the margins of the fins are similarly either light or 
dark.’' 
Ety^nology : — ^Named for Mr. F. H. du Eouley, an ardent field naturalist 
and collector of West Australia, whose recent death we have to deplore. 
II 
