STUDIED IN AlSTIwM.IAN I'ISHKS — Mci'T [.Lncri. \,VA 



AltKNAI'tXiON l;OSKHiASTKH, h'diiisuii ,S' thiilhi/. 



(Plaii' xxi, liir. li). 



Jpogoii r(X<!ei(i((.<fer, Katii.say & Ogilhy, I'loc. I;iiiii. Soc. N.S.Wales (2), i., 

 ' 1886, p". 1101. LI., bgilby, Pjoc. l{.,y. S.K-. Qld., xxi., 1908, p. 24. ' 

 Aiiiix ros,'i,i,(s/,v, Stead, Proc. Linn. Soc. N.S. Wales, xxx., 1905, p. 481. 



Br. 7; U. vi, i/10 (11) ; A. ii/10 (11); P. 14; V. i/5 ; C. 17. L. Lat. 

 26; 1. tr. 1, 1, 6. 



Depth 2-9 ill tlie length to the hypnral jt)iiit; head 2*6 iu the same. 

 Diameter of the eye 'SS iu the head, longer than the snout, and a little 

 greater than the interorbital width ; snout 47, interorbital space 4 in the 

 head. Second dorsal ray 19 in the head, and a little longer than that of 

 the anal ; caudal peduncle 16 in the head. 



Snout obtuse, the jaws sabequal. Nostrils large, with a short inter- 

 space between them ; the anterior with a low membranous border. 

 Maxilla bi'oad, uaked, its hinder angle reaching beyond the vertical of the 

 middle of the eye. Both the preopei'cular margin and the iufraniarginal 

 crest are entire ; opercular border membranous, witliout spines. A narrow 

 band of villiform teeth in each jaw ; vomer with a few microscopic teeth 

 oi- smooth, palatines and tongue smooth. Gill-iakers slender, fourteen 

 on the first gill-arch, those at the hinder angle about half as long as the 

 eye. 



A thick silvery gland with a black upper surface is situated on each 

 side of the base of the tongue, from which a broad silver canal extends 

 backward on each side of the isthmus to the breast ; it expands over the 

 base of the pectoral and covers the lower portion of the abdomen, and 

 thence runs backward above the base of the anal tin to a short distance 

 before the hypural joint. It is shaiply defined, largely by a blackish line, 

 and is perhaps an elaborate phosphorescent organ. 



Head largely covered by membrane which is permeated by canals and 

 pores ; it extends backward on the neck to the fourth scale before the 

 dorsal tin. Operculum with about tive large cycloid scales. Body-scales 

 cycloid ; they extend over the base of the caudal fin, but the other fins aie 

 naked. Lateral line parallel with the back, and extending onto the base 

 of the caudal fin. 



First dorsal tin rounded, the third spine longest. Second ray of soft 

 dorsal highest and much longer than the third dorsal spine ; the edge of the 

 fin is slightly emarginate. Anal has its origin and termination a little 

 behind the same points of the second dorsal, but is similar to that fin in 

 form. Pectorals rounded, the fourth ray longest and reaching the 

 vertical of the anal origin. Ventrals inserted in advance of the pectorals, 

 and not nearly reaching the vent. Caudal emarginate. 



Colouration almost uniform after preservation ; a few brown spots on 

 the head form a bar across the snout and a less definite one across the 

 cheek. Each dorsal fin with a broad brown band crossing its lower half ; 

 a similar band may be [)resent on the anal. 



Described and figured from a specimen 62 mm. long to the end of the 

 middle caudal rays, from the Clarence River estuary, which is well 



