Corals of the Miocene Formations as means of Correlation.—Although a general correlation has been established between the European Mid-tertiary formations and the Nivajé Shale and Limestone of San Domingo, the shale and part of the inclined limestones of Jamaica, the three coralliferous beds of Antigua, and the Newer Parian beds of Trinidad, still it has not hitherto been possible to determine a close parallelism between any particular European and West Indian Miocene stratum.

Dr. Duncan'S researches on the Palæontology of the West Indies have so much enhanced the value of any fossils found in those islands, that I do not hesitate to make a few remarks on some Orbitoides contained in a piece of Antiguan ‘Chert’, given many years ago, by Dr. Nugent, to the Geological Society, and to which Mr. H. M. Jenkins, Assistant-Secretary G.S., some months since directed my attention; and also on some specimens of fossiliferous flint and limestone from Jamaica.

This species (under the generic name of Himantopterus)was first noticed by Mr J. W. Salter in the Quarterly Journal of the Geological Society for 1856 (vol. xii. p. 28, fig. 5); but only the penultimate segment and telson were then known.

In vol. xv. of the same Journal (1859), Mr, Salter described eight species of Eurypterus, from the Upper Ludlow Rocks and the Old Red Sandstone; but he did not refer to E. lanceolatus in that paper. Of these eight species of Eurypterus, E. pygmceus, from its smaller size, is the best preserved species. It occurs in the Downton Sandstone of Kington, in the Basement-beds of the Old Red Sandstone at the Ludlow Railway, and in the Upper Ludlow Rock of Ludford; and I have lately seen an entire specimen (in the cabinet of Mr. Jas. Powrie, F.G.S.), only one inch in length, from the Old Red Sandstone of Petterden in the Sidlaw Hills, Forfarshire.

Everyone who has collected the fossils of the Upper Chalk will have noticed how the Echinoderms and Belemnites are overgrown by small oyster-like shells with a striated disk, commonly passed by as the fry of Ostrea vesiculosa. There is a beautiful example of Micraster cor-anguinum in the Museum of the Geological Society (given by Mr. Bayfield, of Norwich, to the late Daniel Sharpe), on which a dozen of these little shells, each about half an inch across, have left their lower valves; and above twenty are congregated on a fragment of Ananchytes (occupying a space of about three square inches) in the British Museum.

The British Museum has lately received a fossil Fish from the lower Chalk at Folkestone, which appears to be undescribed, and is probably the type of a distinct genus. The fossil is twenty inches long, with the vertebral column and the fins tolerably well preserved, whilst the head unfortunately has suffered so much that scarcely any part of it can be distinguished.