No. 7 bed, 2 miles east of the river Gellibrand, contains :
Trochocyathus meridionalis, Duncan. |Cycloseris tenuis, Duncan. Victoriae, Duncan.
No. 9 bed, 3 miles west of the river Gellibrand, contains :-
Conotrochus typus, Seguenza. Flabellum Candeanum, Edw. & H.
Placotrochus deltoideus, Duncan. Conosmilia lituolus, Duncan.
The Mount Gambier tertiaries contain Flabellum gambierense, Duncan.
The Hamilton tertiaries, Muddy and Violet Creeks, the Murray tertiary deposit, and that of the banks of the Geelong, equivalent- formations, contain : —
Caryophyllia viola, Wood & Duncan.
Sphenotrochus australis, Duncan. —excisus, Duncan.
Flabellum Victoriae, Duncan. —Candeanum, Edw. & H.
Placotrochus elongatus, Duncan. —deltoideus, Duncan.
Palaeoseris Woodsi, Duncan. Conosmilia elegans, Duncan.
Conosmilia anomala, Duncan. —striata, Duncan.
Antillia lens, Duncan.
Balanophyllia seminuda, Duncan. —armata, Duncan. —tubuliformis, Duncan. —fragilis, Duncan. —australiensis, Duncan.
No. 3 of the Cape Otway series = "Mount Gambier coralline limestones ;" and both are deep-sea sediments.
No. 1 of the Cape Otway series is probably the oldest of the beds ; and Nos. 4, 7, and 9 are the equivalents of the Hamilton coral-beds, described by the Rev. Mr. Woods. They are deposits which were formed in shallower water than the " coralline limestones," during a period of subsidence ; they were covered as the subsidence persisted by the deep-sea coralline limestones or their equivalents.
VII. The existing Coral-fauna of the Australian and NEIGHBOURING SEAS.
The existing coral-fauna of the Australian seas is tolerably rich in species, even if the forms from the great reefs to the north and northeast be omitted. The New-Zealand seas, and those around Tasmania and the south coast of Australia, contain many genera and species ; and a comparison of them with the fossil forms is necessary. The following is a list of the species ; but it does not contain the true reef-building forms of the tropical seas to the north, north-west, and north-east of Australia, as they are not within the scope of this essay, no reef- building species having been found in the tertiaries : —
Trochocyathus hexagonalis, Mantell. |New Zealand: recent and raised —Mantelli, Edw. & H. |beaches.
Conocyathus sulcatus, D' Orb. Port Jackson : Oligocene, Mayence.
Flabellum affine, Edw. & H. Australian coast. —rubrum, Quoy & Gaimard, sp. New Zealand : 25 fathoms.
Amphihelia venusta, Edw. & H. Australia.
Stylaster gracilis, Edw. & H. Australia. —sanguineus, Edw. & H. Australia. —granulosus, Edw. & H. Australia.
