BY W. MACLEAY, F.L.S. 359 



anal -with three. Operculum with two or three points, prse- 

 operculum serrated ; chin not very prominent ; eyes moderate. 

 Seas and rivers of tropical regions. 



126. DuLES Haswellii, n. sp. 



D. 10/11. A. 3/10. L. lat. 42. L. transv. 5/9. 



Height of body one-third of total length, the length of the 

 head nearly one-fourth. Eye large, its diameter being, about 

 equal to its distance from the point of the muzzle, three times 

 the height of the preeorbital bone, and about haK the width of 

 the interorbital space, which is rather flat and concave in the 

 profile ; the mouth is slightly oblique, and the maxillary extends 

 to rather beyond the vertical from the posterior margin of the 

 orbit. The praeoperculum is crenulated on the posterior edge* 

 The scales are ctenoid, those on the opercles as large as those 

 on the body. The fifth and sixth spines of the dorsal fin longest, 

 the eleventh nearly as long, but much shorter than the anterior 

 rays, the anal spines are strong and of nearly equal thickness, 

 but increase in length backwards, the third much shorter than 

 the first rays ; the caudal fin is considerably emarginated ; 

 pectorals short. Colour silvery, very dark towards the back ; 

 many of the scales show dark spots, and there are distinct black 

 spots on the opercles and near the anal fin. The vertical fins 

 are blackish with the extreme tips whitish. 



Fresh-waters Rockingham Bay. Length fourteen inches. 



Genus Macquaria, Cut. & Yal. 



Five branchiostegals. No teeth in the jaws or on the palate. 

 Spines strong, eleven in the dorsal and three in the anal fins. 

 Praeoperculum serrated. Scales moderate. 



127. Macqtjaria australasica, Cuv. & Yal. 

 Grunth. Cat. Fishes I., p. 286. Less. Voy. Coqr., Zool. IL, p. 194, 



pi. 14, f. 1. 

 2 T 



