20 MEMOIRS OF THE QUEENSLAND MUSEUM. 



Part XL— LUTIANID^ (No. 2). 



LUTIANUS NEMATOPHORUS Bleeker. 

 (Plate I.) 



Mesoprion nematophorus Bleeker, Act. Soc. Sci. Indo-Neerl., viii, 1860, Celebes, p. 56; id.,. 



Yersl. Akad. Amst.. xii, 1861, p. 46. 

 Lutjanns nemaiophorus Bleeker, Verb. Akad. Amst., xiii, 1873, Kevis. Lutjan., p. 12; id.. Atlas 



Ichth., viii, 1S76, p. 47, pi. cclxxxv, fig. 3. 



THREADFINNED SEA PERCH. 



Type locality: — Celebes. 



Body deeply subovate and strongly compressed, the dorsal and ventral 

 contours symmetrical, its width 2-55 in its depth, which is 2-55 in its length to the 

 root of the caudal and^ one eighth more than the length of the head. Caudal 

 peduncle three eighths longer than deep, its least depth 2-5 in the length of the 

 head. Head two ninths longer than deep, its upper profile behind the snout and 

 that of the nape gently and evenly rounded, its width 2-25 in its length, which is 

 2-85 in that of the body. Snout long and pointed, with linear moderately 

 acclivous profile, its length 2-33 in that of the head. Eye small, its diameter 2-37 

 in the length of the snout, 544 in that of the head, and 1-5 in its distance from 

 the end of the maxillary groove. Interorbital region convex, its width one eighth 

 more than the eye-diameter and 4-87 in the length of the head. Jaws subequal ; 

 maxillary extending to below the anterior border of the eye, its length 2-5 in that 

 of the head, the width of its subtruncate distal extremity 1-3 in the eye-diameter. 

 Preopercle with a slight emargination above the angle, in and beyond which it is 

 feebly serrulate ; opercle without spine, the lobe obtusely pointed ; post-temporal 

 feebly serrated. 



Scales in 57 series above the lateral line, disposed somewhat obliquely to 

 the dorsal profile, in 51 horizontal series below the line ; 8/1/22 scales between the 

 first dorsal spine and the ventral ridge. Head naked, except the opercle, sub- 

 opercle, a patch from seven to nine scales wade on the cheek posteriorly, a triseria] 

 postorbital band, and a short biserial temporal band. Lateral line with 54 pore- 

 bearing scales, the tubes branched. Soft dorsal and anal fins each with a well 

 developed scaly sheath, the membranes naked ; accessory ventral scale small and 

 blunt, 1-5 in the eye-diameter. 



Dorsal fin with x 17 rays, originating above the lower angle of the 

 pectoral-base, the spinous portion one fifth longer than the soft; spines low, 

 slender but pungent, increasing in length to the fifth, beyond Avhich they decrease 

 to the ninth ; last spine a little longer than the fifth and 3-44 in the length of the- 

 head ; fourth to seventh rays produced and filiform, extending to or beyond the 

 extremity of the caudal ; beyond these the rays gradually decrease, the last being 

 about equal to the fifth spine. Caudal emarginate, the middle rays 1-5 in the 

 upper lobe, which is 3-67 in the body-length. Anal fin with iii 9 rays, originating 

 below the third dorsal ray ; spines short and stout, the third longest, 4-14 in the 

 length of the head ; soft portion with acutely pointed outline, the anterior rays 

 produced, the fourth the longest, extending beyond the base of the caudal, length 



