BY J. DOUGLAS OGILBY. 



281 



anterior granulation. Humeral process feebly granular, acute, 

 extending along the proximal half of the pectoral spine. Gill- 

 membranes meeting at an obtuse angle, the free flap narrow. 

 Axillary pore moderate, slit-like. Distance of dorsal fin from tip 

 of snout 2J in the total length; dorsal spine strong, granular in 

 front, serrated behind, the sides striated, its length 4 of that of 

 the head : adipose fin longer than high, its length |^ of that of the 

 dorsal, its distance from which is 34 in the total length : anal fin 

 emarginate, higher than long, its length 2|- in the head : ventral 

 obtusely pointed, I of the head, and not reaching to the anal : 

 pectoral with 10 soft rays, the spine similar to that of the dorsal, 

 its length 4 of the head : upper caudal lobe much shorter than 

 the head, | of the total length; least depth of caudal peduncle ^ 

 of its length behind the adipose fin. Vent a little nearer to the 

 ventrals than to the anal. Deep lead-blue above, silvery below. 

 (I^roxhmts, nea,Y : on account of its outward resemblance to A. 

 aitstralis.) 



The example described is in the Macleay Museum, Sydney 

 University, and measures 400 millimeters. It was obtained at 

 Port Darwin, North Australia. 



Arius stielingi, sp.nov. 

 B. vi. D. i 7, 0. A. 22. 



Depth of bady i'i, length of head 3| in the total length; width 

 of head 4 of its length, the upper profile linear and but little 

 oblique. Eye with partially adnate lid, its diameter 7 in the 

 length of the head and 2| in that of the snout, which is rounded, 

 and 1^ times as wide as long. Interorbital region gently rounded, 

 its width a little less than that of the mouth and 2^ in the length 

 of the head. Premaxillary teeth in a continuous band, which is 

 emarginate behind, obliquely rounded at the extremities, and 

 about nine times as long as wide; mandibular band narrowly 

 divided, tapering from the symphysis; vomerine patches well 

 developed, separated by an interspace; palatine patch ovate, much 

 wider than long, narrowly separated from and twice as wide as a 



