chus, should be noticed in all the species of Conosmilia. The continuation of the septa and costae is likewise wanting in some Liassic Montlivaltioe, and in many simple Rugosa. The importance of the Conosmilioe can hardly be estimated at present ; but it is evident they are very synthetic forms, occurring late in the coral faunas of the world. The genus Haplophyllia, Pourtales, whose solitary species were dredged in 324 fathoms off the Florida reef, has a styliform columella and an octomeral arrangement of the septa. There are no endothecal dissepiments.
Antillia lens is a discoid form, representing the discoid Montlivaltioe in this genus, which differs from that celebrated Mesozoic one by having a distinct columella. The genus is well represented in the West-Indian Miocene ; and there are fossil species in the Arabian, Sindhian and Travancore Miocene. I have lately seen a recent Antillia from Batavia. Nevertheless A. lens is the only discoid form, and is very beautiful and characteristic.
The eight new species of Balanophyllia, and that already known as a form from the Miocene of Tortona, give a very Falunian and Crag facies to the Australian corals as a whole, especially as there are no recent species known in the seas around. There are recent species in the Philippines and close to the American continent at Panama ; but they are not amongst those found in the Australian tertiaries. Forming a large proportion of the fossil fauna, the Balanophyllioe stamp the deposits with a definite character as regards the depth at which they occurred ; and this is rendered almost certain by the bathymetrical disposition of the genera Caryophyllia, Flabellum, Placotrochus, Sphenotrochus, and Amphihelia. The northernmost Faluns contain vast quantities of Balanophyllioe (not of species), a Flabellum and Sphenotrochi ; and there, as in the Australian Tertiaries, every gradation of sea-depth, from the abyss to low spring-tide mark, is represented by species.
The Australian Balanophyllioe are as peculiar as most of the other corals, and are very characteristic. I cannot distinguish between one form and B. italica, a well-known Italian Miocene species.
VI. Localities.
The strata numbered No. 1 by Mr. Selwyn, and which are 1-1/2 mile west of Cape Otway, contain : —
Flabellum distinctum, Edw. & H. Conotrochus M'Coyi, Duncan. Deltocyathus italicus, Edw. & H., var.
Balanopliyllia cylindrica, Michel, sp., var. Ulrichi, Duncan.
Bed No. 3, of the Upper " Coralline deposits," Cape Otway, contains : —
Amphihelia incrustans, Duncan. | Balanopliyllia Selwyni, Duncan.
No. 4, Clay bed near Cape Otway, with Trigonia semiundulata, contains : —
Flabellum gambierense, Duncan. —distinctum, Edw. & H.
Placotrochus elongatus, Duncan. Balanophyllia campanulata, Duncan.
