BY W. MACLEAY, F.L.S. 367 



lower long, strong and acute. The spines of the dorsal fin strong, 

 the fifth longest ; the spine of the soft dorsal more than twice the 

 length of the preceding one ; the soft dorsal and anal fins lower 

 than the spinous dorsal, the third anal spine the longest ; caudal 

 fin deeply emarginate, the lobes pointed ; pectorals small, shorter 

 than the ventrals. Colour silvery, each scale with a yellow or 

 pearly centre. . The top of the head and all the fins blackish, 

 excepting the spinous dorsal, which seems to have been of a 

 lighter colour, with a large black blotch from the third to the 

 seventh spine. 



Eockingham Bay. One specimen eight inches long. 



143. Therapon- longulus, w. sp, 



D. 12/10. A. 3/7. L. lat. 48. 

 The height of the body is one -fourth of the total length, the 

 length of the head nearly the same. The eyes are about the 

 diameter of the orbit apart, the interspace flat and naked ; the 

 length of the snout is about the same. The teeth in the external 

 row in both jaws are strong, regular, and a little curved. The 

 preeorbital is dentated behind over the maxillary, the pree- 

 operculum is strongly and regularly dentated on the posterior 

 margin the denticulations becoming smaller below the angle ; 

 the lower point of the operculum is divided into two or three 

 strong spines; the coracoid is large, free, and strongly denticulated. 

 The dorsal spines arc rather slender ; the second and third anal 

 spines are about equal ; the tail is subtruncate. The coloration 

 seems to have been uniform, in spirits the specimens present a 

 dingy grey appearance all over. Length six inches. 



Fresh-waters inland from Port Darwin. 



Genus Helotes, Cuv. 



Differs from Therapon only in having the teeth lobed on each 

 side. 



2 U 



