246 DESCRIPTIVE CATALOGUE OF AUSTRALIAN FISHES, 



less than the width of the interorbital space, and two-thirds of 

 the length of the postorbital part of the head. Vertex and inter, 

 orbital space convex. The root of the ventral fin is nearly 

 midway between the front margin of the eye and the base of 

 the caudal fin. Dorsal and anal rays scaleless, the former a 

 little longer than the latter ; they commence opposite to each 

 other. Caudal fin moderately forked, with the lobes nearly ecp^al 

 the central rays being much longer than the eye. Sides with a 

 well defined silvery band as broad as a scale. 



Port Jackson. 



869. Hemirhamphus argenteus, Beun. 

 Hemirhamphis Ireviceps, Casteln., Proc. Linn. Soc. Yol. II., p. 240. 



Brisbane. Pare in Sydney. 



870. Hemiruamphus margin atus, Forsk. 



Gunth., Cat. Pishes VI., p. 270.— Bleek., Atl. Ichth. Scombr., 



tab. 8, fig. 4. 



D. 14. A. 11-12. L. lat. 52. 



The length of the entire head is contained twice and three- 

 fifths, or twice and a half in the total (without caudal), the length 

 of the lower jaw beyond the extremity of the upper, four times 

 and one-third. The triangular part of the upper jaw, formed by 

 the intermaxillaries, is as broad as long. The diameter of the 

 eye equals the width of the interorbital space, and is contained 

 once and three-fourths in the length of the postorbital part of the 

 head. The root of the ventral fin is nearer to the caudal than to 

 the axil of the pectoral. Dorsal and anal fins scaleless, the 

 former much longer than the latter. Caudal fin deeply forked, 

 the central rays being shorter than the eye. Back dark greenish; 

 sides with a rather indistinct silvery band. 



Palm Islands (Chevert Exp.) 



