RELATIONSHIPS OF THE AUSTRALIAN CAINOZOIC SYSTEM. 
found, often in abundance, in the shallow- water deposits of some of 
the beds in the Tertiary series, such as those of Clifton Bank, Muddy 
Creek, and Waurn Ponds, near Geelong. 
The earliest reference to the “ Orbitoides ” group in the southern 
Australian Tertiaries was made by the Rev. W. Howchin, F.G.S., 
who, in 1889, recorded Orbitoides dispansus, Sowerby, 0. mantelli, 
Morton, and 0. Stella to, d’Archiac, from the lower beds at 
Clifton Bank, Muddy Creek, near Hamilton, Victoria.* An 
examination of the median layer of the Muddy Creek forms shows 
them to belong to the genus Lepidocyclina, a group that was 
imperfectly worked out when Mr. Howchin made his determinations. 
The lepidocyeline relationship was suggested by Lemoine and 
Douville in their paper, “ Sur le Genre Lepidocyclina, Gumbel/’f 
where they say, “ a Muddy-Creek (Victoria), dans des couches cjue 
Ton considcre comme d'.ige eocene, M. Howchin a signale 0. mantelli 
et 0. sfellata d’Archiac ; cette derniere forme, d’apres la description 
de M. Howchin, possede desloges hexagonal es et doit, par suite, etre 
rangee dans le genre Lepidocyclina.” This latter form 1 had already 
determined to my own satisfaction as belonging to that genus, and 
have since been able to refer it to L. martini, Schlumberger. 
In 1891 Messrs. Hall and Pritchard recorded Orbitoides mantelli 
from the Filter Quarries and Upper Quarry at Batesford ; and also 
at Griffin’s and near Madden’s in the Moorabool Valley to the south- 
east of Batesford. J These specimens were identified by Mr. Howchin . 
Genus Lepidocyclina, Giimbel. — Examples of the genus Lepido- 
cyclina have been collected by me from four of the known localities 
in Victoria, and this collection has been further increased bv specimens 
kindly given me by Dr. T. S. Hall. The localities furnishing this 
interesting group of foraminifera are, in the Balcombian series — 
Clifton Bank, Muddy Creek ; in the Janjukian series — Waurn Ponds, 
Batesford, Griffin’s, near Madden’s, along the Moorabool Valley, 
all near Geelong; and at Green Gully, Keilor. Quite recently I found 
a rich horizon for Lepidocyclina in Western Victoria, in the Janjukian 
limestone of the Grange Burn opposite Mr. Henty’s farmstead. 
It has already been pointed out in another place§ that, whilst 
the Burdigalian species, Lepidocyclina tournoueri, Lemoine and 
R. Douville, occurs in great abundance at Batesford, the Keilor 
ferruginous limestone contains, besides this form, another species. 
A. verbeeJci, Newton and Holland, a species also met with at Clifton 
bank (Balcombian). This fact seems to point to the Keilor horizon 
representing, although Janjukian, a bed slightly older than the 
Batesford limestone. 1 o illustrate this more clearly we may note 
* Trans. Roy. Soc. S. Austr.. vol. xii.. 1S89. p. 17. 
t Mom. Soc. Geol. France, vol. xii.. fasc. ii.. 1904, p. 32. 
+ l’roc. Roy. Soc. Viet,, vol. iv.. pt. 1. 1891, pp. 10, 18. 19. 
| ( Uapman. A Study of the Batesford Limestone.” Proc. Row Soc. 
( N.S.), pt. 2, 1910, p. 311. 
Viet., vol. xxii. 
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