BY J. DOUGLAS OGILBY. 295 



slightly convex, much shorter than the eye, which is 5i to 5J in 



the length of the head. Interorbital region almost flat, its width 



7^ to 8^ in the length of the head. Maxillary extending to the 



vertical from the posterior border of the eye, its length ^ of the 



head. Dorsal rays increasing in length to the last, which is about 



I longer than the eye : anal originating below the 23rd or 24th 



dorsal spine, its distance from the tip of the mandible 2^ to 2| in 



the total length : ventral shorter than the eye : caudal with 13 



rays, 14 to 15| in the total length. Pale yellowish or pinkish, 



the upper surface and the dorsal fin chestnut-brown growing 



lighter posteriorly, the two colours sharply defined ; upper surface 



of head uniform yellowish-brown or with longitudinal darker and 



lighter bands. 



Named for Dr. A. Zietz, Assistant Director, South Australian 

 Museum. 



Described from three examples from St. Vincent's Gulf, the 



largest of which measures 105 millimeters. 



PLEURONECTID^. 



Arnoglossus fisom, sp.nov. 



B. vi. D 98. A. 74-75. L.l. 55-58. Vert. 10/29. 



Depth of body 1^ to 2, length of head 44 to 4 J in the total 

 length. Head a little deeper than long, the profile from in front 

 of the upper eye evenly convex and separated from the rounded 

 snout by a conspicuous cleft, its length 4 to |- of the space 

 between the anal fin and the commencement of the straight 

 portion of the lateral line. Eyes without orbital ridge, the lower 

 very slightly in advance of the upper, its diameter 4|- to 4|- in 

 the length of the head. Interorbital region narrow and flat, 

 naked. Snout smooth, ^ to 4 longer than the eye. Jaws equal; 

 cleft of mouth very oblique, the maxillary extending to the 

 vertical from the anterior border of the eye, its length 2| to 2^ 

 in the head, its width at the distal extremity f of the diameter 

 of the eye. Jaws with a single series of small teeth, those on the 

 left ramus of the mandible somewhat larger and more distant; 



