66 . 
FLrVIFAUXrLAE OF Ar.^TRALTA. 
S.A. NAT.. 
VOL. xvnf.. No. 4. 
already a peculiar family N am^atherinidae related to the Austra- 
lian freshwater Sunfish has been recognised, while Eels are present. 
A very remarkable Mussel, Lortiella, has already been discovered, 
and other freshwater mollusca are known, but these show no 
extra-ordinary forms, 'khis is the least known of the districts 
of Australia as to its fish and molluscan faunulae so anything 
may yet turn up. 
Vlaminghian Fluvifaunula. 
The \'LAl\IINGHIAX FLLATFAUNULA occurs in the 
Leeuwinian Area, and although this is also not well known^ and 
nothing distinctive of an Autochthonian element has yet been 
noted unless Bostockia (Perchlet) be such. Another strange 
Perch (Edelia) exists, and the species of Galaxias (Native Trout) 
are there different, and it is suggested that when these, Terapon 
(Grunters) and Gudgeons are intensively studied, they will be 
differentiated in accordance with the fluvifaunulae here distinguish- 
ed. The Freshwater Mussels are separable as Westralumo, while 
\ iviparine molluscs do not enter into this fluvifaunula, though 
Bullinids are present. 
Sturtian Fluvifaunula. 
The STURTIAN FLU\ IFAUNULA inhabits the rivers and 
lakes of the Centralian or Larapintine Area westward of the Darl- 
ing, which has a fluvifaunula of its own. A peculiar Goby 
(Chlamydogobius) has been described, but as would be anticipat- 
ed, fish are not numerous. 'Fhe molluscs show specialisation, a 
\ iviparine evolution, Centrapala, being noticeable, as also the 
widely spread Bullinid genus, Isidorella, and the Mussel genus, 
Centralhyria, A very remarkable molluscan form, Coxiella, fre- 
quents the salt-water lakes of the \’lami,nghian sector, and recurs 
ui the Bassian sector, while a development, Coxielladda (type, 
Ealudina gilesi Angas) is found in the salt-water lakes of the 
Sturtian influence. 
Mitchellian Fluvifaunula. 
The MITCHELLIAN FLUVIFAUNULA is very striking, 
occurring in the Darling, Murrumbidgee, Murray, with their trib- 
utaries and the river captures of South Eastern Queensland. The 
world-famous Murray Cod {M.acctdlochella) characterises this 
fluvifaunula, but it is not alone, being accompanied by the quaint 
Bass (Macquaria), the Catfish (Tandanus), the Slippery Black- 
fish (Gadopsis), and Blandozvskiella, a distinctive Chanda Perch. 
Eels are absent, a noteworthy negative item. 
The large Freshwater Mussel, Alathyria, is notable in this 
fluvifaunula. . . _ . 
