BY "W. MACLEAY, F.L.S. 353 



of the eye is one-seventh, of the latter. Praeoperculum, supra- 

 scapiila and prgeorbital entire ; pectoral and ventral fins short, 

 caudal rounded, the fifth dorsal spine longest, the second and 

 third of the anal nearly equal. Colour greenish-brown, with 

 numerous small dark green spots ; belly whitish. 



All the rivers of the Murray system, and some of the northern 

 coast rivers of New South Wales. 



115. Oligorijs Mitchelli, Casteln. 



Proc. Zool. Soc. Victoria, Vol. 11., p. 150. 



Differs from 0. macquariensis in having the head much broader, 

 the eye considerably larger, it being one-sixth of the length of 

 the head, the upper jaw longer than the lower, the operculum 

 more rounded and the caudal fin a little longer. The height of 

 the body also is three times and a-third in the length without 

 the caudal, instead of four times and a-half as in the other species, 

 and the upper profile is more convex. 



In all the "Western rivers. 



116. Oligorus terr^-regin^, Eams. 



Proc. Linn. Soc. N. S. Wales, Vol. Y., p. 93, -gl. 9. 



One specimen in the Australian Museum from Brisbane, 

 measuring six feet in length and weighing over one cwt. 



Genus Homalogrystes, All. & Macl. 



Body oblong. Mouth large. Lower jaw longer than the 

 upper. A broad band of acute recurved, somewhat conical teeth 

 in both jaws ; a band of similar teeth on the vomer and palatine 

 bones. Two canines close together in front of the upper jaw ; 

 tongue smooth. Six branchiostegals. Operculum armed. Prre- 

 operculum bluntly serrated and emarginate on the posterior edge. 

 Eye moderate. Scales small. One dorsal fin with eleven spines. 

 Caudal fin rounded. 



