1870.] DUNCAN—AUSTRALIAN CORALS. 311 
No. 7 bed, 23 miles east of the river Gellibrand, contains :— 
Trochocyathus meridionalis, Duncan. | Cycloseris tenuis, Duncan. 
Victoriz, Duncan. 
No. 9 bed, 3 miles west of the river Gellibrand, contains :— ~ 
Conotrochus typus, Seguenza. Placotrochus deltoideus, Duncan. 
Flabellum Candeanum, Edw. & H. 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. —— striata, Duncan. 
excisus, Duncan. Antillialens, Duncan. 
Flabellum Victoriz, Duncan. Balanophyllia seminuda, Duncan. 
Candeanum, Hdw. § H. armata, Duncan. 
Placotrochus elongatus, Duncan. — tubuliformis, Duncan. 
deltoideus, Duncan. fragilis, Duncan. 
Palzoseris Woodsi, Duncan. | australiensis, Duncan. 
Conosmilia elegans, 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. 
Conosmilia anomala, Duncan. 
VIL. Tue exisrine 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 north- 
east 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, Manztell. } New Zealand: recent and raised 
Mantelli, Hdw. g H. beaches. 
Conocyathus sulcatus, D’Orb. Port Jackson: Oligocene, Mayence. 
Flabellum affine, Edw. g H. Australian coast. 
—— rubrum, Quoy & Gaimard, sp. New Zealand: 25 fathoms. 
Amphihelia venusta, Edw. § H. Australia. 
Stylaster gracilis, Edw. f H. Australia. 
sanguineus, Edw. ¢ H. Australia, 
granulosus, Edw. § H. Australia. 
