182 MR. G. KREFFT ON NEW AUSTRALIAN FISHES. [Apr. 26, 
yellowish white; crown and a vertebral line running from the neck 
to the tip of the tail black. 
Hab. North-east Australia, neighbourhood of Rockhampton. 
5. Notes on AUSTRALIAN FRESHWATER FISHES, AND DescrIP- 
TIONS OF Four New Species. By Grerarp KRerFrtT. 
The scanty knowledge which we possess of the fishes inhabiting 
our freshwater streams has induced me to pay some attention to this 
subject ; and I now furnish a list of species of the several rivers | 
from which I have received specimens. To begin with our imme- 
diate neighbourhood, I find that up to the present time not more 
than four species have been captured in the streams emptying into 
Port Jackson and Botany Bay :—unamely, Eleotris australis, sp. nov. ; 
Mugil dobula, Gthr.; Anguilla australis, Rich.; and Galaxias scriba. 
These four species we find in almost every stream, swamp, and 
lagoon, Galaxias scriba even in old wells or other water-holes on 
the top of hills, which have no connexion with any of the running 
streams. Anguilla australis is also frequently found in detached 
pools of water ; whilst Eleotris australis frequents the clearer stream- 
lets. I have never had an opportunity of examining the creeks which 
are situated upon the north shore of Port Jackson, nor have I ever 
received specimens captured there ; but I have reason to believe that, 
besides the four kinds of fish mentioned, there exists a larger fresh- 
water species, commonly called ‘ Perch,” probably a Therapon, 
which is not found in the salt water of the harbour. 
With regard to the fishes of the Nepean or Hawkesbury, its tri- 
butaries, and the swamps and lagoons with which this river is occa- 
sionaily connected during high floods, I am enabled to give a better 
account. I have drawn the seine in the Hawkesbury between 
Windsor and Richmond, about fifty miles from its mouth, where the 
water is as fresh as that of any mountain-stream ; and the result was, 
at a haul, about 200 so-called “‘ Mullets’’ (two species, Mugil dobula, 
Gthr., and Mugil compressus, Gthr.), two ‘“ Eels” (Anguilla aus- 
tralis, Rich.), a ‘‘ Perch”? (Lates colonorum, Gthr., Ann. N. H. 
1863, xi. p. 114), and a ‘Rock Cod” (Dertropogon robustus, Gthr.). 
How this last fish managed to go so far up a freshwater river I could 
not understand. It has all the appearance of a true sea-fish; and 
yet I took it subsequently much further up the river, between the 
mountains, whilst I have also received two specimens captured with 
hook and line in Mr. Pitt’s lagoon near Bronte—a lagoon which, 
Mr. Pitt informs me, has not been flooded during the last four 
years. There is another fish, called a ‘‘ Bream”? by the settlers, 
which we did not succeed in capturing (this is probably Beryx affinis), 
and a second species of Perch, which may prove to be new. Ata 
second haul a true Flat-head (Platycephalus tasmanius, Rich.) was 
secured, besides the usual amount of ‘ Mullet’? and “ Perch.” 
The smaller fry, as Galaxias scriba, Rich., and the so-called Sprat 
