150 MEMOIES OF THE QUEENSLAND MUSEUM. 



a slight emargination at the isthmus; width of body 4 in its depth, which is 

 2-3 to 245 in its length and five ninths to two thirds more than the length of 

 the head; abdominal region moderate, 1-67 in the length of the anal; caudal 

 peduncle about three fifths longer than deep, its least depth three tenths more 

 than the eye-diameter. Head rather small, its length 3-8 in that of the body, 

 its width 1-8 in its depth, which is 1-1 in its length; cranio-nuchal keel little 

 developed. Snout moderate and rounded, its upper profile linear and oblique, 

 with a slight prefrontal prominence, its length one eighth more than the eye- 

 diameter, which is 3-85 to 4 in the length of the head ; adipose lid little developed ; 

 interorbital region elevated and sharply rounded, its width three eighths more 

 than the eye-diameter. Jaws equal ; maxillary extending to below the anterior 

 border of the pupil ; its length 2-75 in that of the head, the width of its concave 

 distal extremity two thirds more than its distance from the eye and 2-55 in 

 the eye-diameter. Preopercle with rounded angle, the membranous border 

 feebly crenulate, the hinder limb vertical. 



Both jaws with a band of villif orm teeth ; similar teeth on the vomer and 

 palatines; pjterygoids and tongue smooth. 



Scales small and roimded on the trunk, becoming gradually larger on 

 the tail; cheeks and postorbital region scaly; rest of head and nuchal ridge 

 naked. Lateral line with a feeble curve anteriorly, thence straight to the caudal 

 fin, the pores about 95. 



Dorsal fin with vi, i 23 or 24 rays ; procumbent spine strong and exposed ; 

 spines short and separate, graduated, the last 1-4 in the eye-diameter. Soft 

 dorsal originating one fifth nearer to the root of the caudal than to the tip of 

 the snout, the anterior rays produced, the first the longest, varying from 2-25 

 to 3-2 in the body-length, and extending when depressed to the base of the 19th 

 ray or the middle of the caudal peduncle ; last ray not produced. Caudal fin 

 very long and deeply forked, the lobes pointed, the upper rather the longer, 1-95 

 to 2-15 in the length of the body. Anal fin with ii, i 23 rays, originating a 

 little in advance of the soft dorsal, its lobe as high as that of the dorsal. 

 Pectoral pointed, with 17 rays, its length 5-5 in that of the body ; 4th ray longest, 

 extending to a little beyond the level of the vent. Ventral small, inserted slightly 

 behind the pectoral-base, its length 1-75 to 1-85 in that of the pectoral and 9 to 

 9-75 in that of the body; 1st and 2nd rays equal, reaching to the vent. 



Gill-rakers rather short and moderately strong, 7-|-16 on the anterior 

 arch, the longest 8-2 in the length of the head and as long as the gill-fringes. 

 Vent midway between the origins of the ventrals and anal. 



Upper surface of head and body greenish gray, shading through the 

 silver-gray of the sides to the milk-white of the lower surface ; a series of four 

 round spots on each side upon the lateral line ; the first faint, situated upon the 

 curve, below the procumbent spine; the second larger and darker, below the 

 3rd and 4th spines ; the third rather larger, below the anterior dorsal rays ; the 

 last much smaller and fainter, below the middle of the soft dorsal.^" Dorsal and 

 anal lobes and the outer edge and tip of the upper caudal lobe blackish. 

 (Named after L. A. J. Baillon, an early French naturalist.) 



Described from one of two specimens collected by Mr. McCuUoch at INIurray 

 Island, these being at present the only authentic examples known from Australian 



^^ On the left side the arrangement of the spots is similar, but all are appreciably fiirther 

 ba<;k. 



