70 NEW GENERA AND SPECIES OF AUSTRALIAN FISHES, 



narrow or wide; dorsal fin inserted above or a little behind the 

 ventrals; anal tin moderate. 



Clupeids of small or moderate size, inhabiting the seas and 

 fresh waters of south-eastern Australia and the western shores of 

 South America. Two or three recent genera and four species are 

 now known. 



POTAMALOSA. 



Pofamalosa, Ogilby, Proc. Linn. Soc. N.S. Wales, xxi. 1896, p. 

 504 (1897). 



Body oblong, strongly compressed. Cleft of mouth oblique,, 

 the lower jaw projecting; premaxillaries but little emarginate 

 anteriorly; maxillaries narrow. Teeth present in the jaws, on 

 the palatines, and on the tongue; -s'omer and pterygoids toothless. 

 Eye moderate, with the adipose lid little developed. Lower limb 

 of preopercle short; suborbital bone longer than deep. Eight or 

 nine branchiostegals ; pseudobranchi;e rather small ; gill-rakers 

 in moderate number, rather short and stout, serrulate. Dorsal 

 tin originating well in advance of the middle of the body; anal 

 fin rather short and deep, composed of eighteen or less rays; 

 ventral fins well developed, with eight rays; inserted below the 

 anterior fourth of the dorsal; pectorals small and pointed, with 

 sixteen or seventeen rays ; the upper ones the longest; caudal 

 forked. Scales moderate and adherent, with the free margin 

 rounded and entii*e; base of the ventral, pectoral, and caudal fins 

 scaly; an elongate scale in the axil of the ventral; dorsal scutes, 

 prominent, but not so strong as those of the abdomen, which 

 originate on the front of the throat; rauciferous system almost 

 confined to the main arteries. Bones of the head but little 

 striated, the occiput almost, the opercle quite smooth. Vertebrae 

 46. 



E t y m o 1 o g y. — Trora/ioj, a river; AJosa. 



T y p e. — Fotamalosa antiqua, Ogilby. 



Distributio n. — Rivers of the eastern watershed of New 

 South Wales. 



