446 ox THREE UNDESCRIBED FISHES FROM PORT JACKSON, 



The example, from which the alcove description was taken, was 

 trawled in Middle Harbour on the 22nd ult., and id an adult male, 

 measuring 22^ inches. The species under consideration bears 

 considerable similarity to the Scyllium bilrgeri of Miiller and Henle, 

 but the greater size of the spots, the pattern of coloration, and the 

 much larger and differently sha])ed anal fin distinguish it from that 

 species at a glance. 



Registered number of type in the Australian Museum, B. 8,447. 



Heliastes immaculatus. sp. nov. 



D. 13/17. A. 2/14. V. 1/5. P. 18. C. 15. L. lat. 28. L. 

 ^rans. 4/12. 



Lengtli of head about 4, of caudal fin 4 J to 4|, height of body 

 2g in the total length. Diameter of the eye i of the length of 

 head, equal to that of the snout, and of the interorbital space, 

 which latter is convex and rather swollen. Jaws equal. The 

 maxilla does not quite reach to the anterior margin of the eye • 

 its front edge is strongly arched inwards. Greatest width 

 of the pre-orbital half a diameter of the eye. Teeth in the jaws 

 in a single series, conical. Dorsal fin commences somewhat in 

 front of the vertical from the end of the operculum ; its 4th spine 

 is the longest, about | the length of the head ; the 5th to 9th rays 

 longest, much longer than the spines. The anal commences beneath 

 the 12th dorsal spine ; its second spine is stronger and longer than 

 any of the dorsal spines. Outer ventral ray elongate, longer than 

 the head, and reaching to behind the anal spines. Pectoi-als rather 

 less than length of head. Caudal forked. The scales extend in 

 front of the eyes, and for more than half the height between the 

 dorsal spines : eight longitudinal series on each cheek. 



(jrround color pale olive-green above, silvery below, the sides 

 with a bronzy wash. The scales on the lateral line are darker, 

 giving an appearance of a faint band. The vertical fins have a 

 violet tinge, and are narrowly edged with pale blue. 



The description is taken from a specimen trawled on Shark Reef, 

 where several examples have been obtained during the last two 

 months ; none of them exceed six inches in length. Registered 

 number of type in the A.ustralian Museum collection, B. 7,452. 



