RELATIONSHIPS OF THE AUSTRALIAN CAINOZOIC SYSTEM. 
species of which indicate deeper bathymetrical surroundings than 
the upper beds at Muddy Creek, and clearer water than prevailed 
in the Beaumaris area. 
The view that the Bairnsdale limestone indicates a somewhat 
low horizon in the extensive and extremely variable Janjukian 
series 1s supported by the fact that the two Tertiary groups as 
revealed in geological sections along the course of the Mitchell River 
in the Bairnsdale district are unconformable.* Here, as indicated 
by Dr. Howitt, the Upper Cainozoics rest on an eroded surface of the 
Bairnsdale limestone. This is also clearly set forth by Messrs. 
Dennant and Clarke,t who state that at Rose Hill, “ Immediately 
underlying the Miocene [Lower Phocene] marls there is the typical 
Eocene [Miocene] limestone of the area, which was here evidently 
an eroded surface when the later beds were deposited upon it.” 
The same authors also record the Kalimnan series at Belle Vue, 
represented by a fossiliferous ironstone bed. 
D.—The Geelong Area.—Corio Bay. 
The strata exposed in the low sea-cliff of Corio Bay consist of 
yellow and occasionally greyish shelly and earthy marls, in which 
the large Magellanias, large Pectens, and_ solitary corals are 
conspicuous. “The beds are evidently an argillaceous phase of the 
Janjukian stage. An extensive comparison of the fauna with 
that of some Balcombian marls would at first sight lead one to 
suppose the ages of the two beds to be identical, so many species of 
mollusca and other fossils being common to both beds. If, however, 
we test the faunas from these beds and select the restricted species, 
we find the following list of nine species of fossils present in the 
Corio Bay series,{ which are elsewhere entirely confined to Janjukian 
localities. They are :— 
Bullinella paucilineata, Tate and Cossman. 
Ancilla ligata, Tate sp. 
Scala echinophora, Tate sp. 
Turbonilla liraecostata, T. Woods. 
Limopsis insolita, Sow. sp. 
Pecten praecursor, Chapman. 
P. peron, Tate. 
Nucula semistriata, Tate. 
Linthia (2) gigas, McCoy sp. (probably referable to ZL. moora- 
boolensis, Pritchard). 
Besides these Janjukian restricted forms, another species, Wysella 
sericea, Tate, is recorded which elsewhere only occurs in the overlying 
Kalimnan series at Beaumaris, the upper beds of Muddy Creek, and in 
* Prog. Rep., vol. ii., 1874, p. 62, section No. 4 
+ Proc. Roy. Soc. Vict., vol. xvi., pt. 1, 1903, p. 21. The terms in square brackets are 
inserted by the present writer. 
t See list of Cainozoie Fossils, by Dennant and Kitson. Rec. Geol. Surv. Vict., vol. i., pt. 
2, 1903. 
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