BY J. DOUGLAS OGILBY. 5 



DorspJ fin originating a little behind the ventral and 

 one fifth nearer to the tip of the snout than to the root of 

 the caudal, its length 1-55 in its height ; outer border linear, 

 the last ray not produced. Anterior rays of anal about 

 thrice as long as the middle rays and 1-4 in the height of 

 the dorsal. Middle caudal rays 2 in the lower and longer 

 lobe. Pectoral fin long and pointed, extending to or 

 slightly beyond the base of the ventral. Space between 

 origin of ventral and tip of snout 1-45 in its distance from 

 the root of the caudal. 



Gilhrakeis long and slender, 24 on the lower branch 

 of the anterior arch, the longest 1 -25 in the diameter of the 

 eye. Vertebrae 42. 



Pale green above ; sides and belly silvery ; usually 

 a dusky shoulder spot. Longer dorsal rays and caudal 

 lobes narrowly tipped with blackish. 



Total length 150 millim. 



Rivers of South- Eastern Queensland. Abundant in 

 the Brisbane River, where it is taken commonly in the 

 praw^n nets, but is not used as food. 



Described from numerous specimens measuring from 

 7^2 to 150 millimeters. 



Allied to A. nasuta (Castelnau)* from the Norman 

 River, Carpentaria, from which it may be distinguished 

 b)y the following characters : — 



Depth of body rather more than 3-00, length of head 

 4.50 in length of body ; dorsal originating midway between 

 tip of snout and base of caudal . . . . . . nasuta 



Depth of body rather less than 3-50, length of head 

 3.75 in length of body ; dorsal originating one fifth nearer 

 to tip of snout than to base of caudal . . . . (Bstuaria 



Type in the Museum of the A.F.A.Q. ; Cat. No. 406. 



SYNODIDiE. 



XYSTODUSt gen. nov. 



Body depressed. No lateral line. Teeth in the jaws 



unequal and uniseiial, consisting of long compressed widely 



separated sagittate fangs, having between each pair one 



or two much shorter obtusely pointed teeth ; palatine teeth 



* Engraulus nasutus Castlenau, Proc. Linn. Soc. N.S. Wales, iii, 

 1879, p. 5). 



'\^v(Tr6vy a spear ; oSol's, a tooth. 



