BY J. DOUGLAS OGILBY. 727 



Gray Mullet, which was said to be found in the George's River 

 above the weir at Liverpool and in the adjacent waterholes, and 

 which, my informant assured me, differed greatly from any of 

 those inhabiting the estuary, in which it was very rarely obtained, 

 and then only after severe floods, by Avhich a few of these fishes 

 and of the fresh-water Herrings ( PotamnJosa iiova-hollandice) are 

 occasionally swept down over the weir from the upper reaches of 

 the river. 



The pools wdiich we netted are merely drinking-places for 

 stock, either of artificial construction or natural depressions of 

 the ground, and are fed by the overflow from the river during flood- 

 time supplemented by the rainfall, or in one -instance at least by 

 filtration through the sandy ridge intervening between the Avater- 

 hole and the river, the water alwa3\s maintaining the same level 

 in the two. 



At the time of my visit all the pools were very low in con- 

 sequence of the long continued drought, only the one to Avhich 

 reference has just been made being anywliere of a greater depth 

 than six feet, and in it, owing to the inequalities of the bottom 

 and the presence of snags, assisted by the clearness of the water — 

 the result of filtration — we were almost quite unsuccessful, our 

 entire capture consisting of a single example of the Smelt 

 ( Retro phi') la) and a young Australian River-Perch ( rercalates 

 coloiiorum). 



The latter of these species is known to occur abundantly along 

 the entire coastal region of south-eastern Australia and northern 

 Tasmania, but the range of Retropinna is by no means so well 

 understood, as it has been very generaljy confounded with 

 Galaxias; but, in such opportunities as I have enjoyed for observ- 

 ing our fresh-water fishes in their native haunts, I have not so 

 far succeeded in detecting the two genera as associating in the 

 same waters. In Macleay's Catalogue, jSTo. 8-40, Vol. ii. p. 164, 

 (Proc. Linn. Soc. JV.S. Wales, vi. ISSl, p. ,,'JS) the only 

 Australian locality given is " Rope's Creek," and we may, there- 

 fore, take it for granted that this was the only place known to the 

 author from which the genus had been recorded outside of New 



