Sir,—I beg to send you a notice, seemingly made with much care, respecting the origin and occurrences of earthquakes in England, which I find among some MSS. of an ancestor of mine, who, towards the end of last century, was an active Fellow of the Society of Antiquaries. It is curious as a record of the crude notions on volcanic phenomena prevalent to so near our times, and may be of some interest as a list—albeit imperfeot—of the numerous earthquakes noted in a country where earthquake-movements are exceptional occurrences, and as a record of some peculiar phenomena which, notwithstanding the quaint and pretentious narration, have considerable geological interest. According to this record, the earthquakes were distributed as under by centuries and seasons.

It is a well-known fact that the shell-bearing gravels of the Western counties repose in many localities immediately upon a bed of blue or grey clay. This bed has been described as it appears in Lancashire and Cheshire, by Mr. Binney; and more recently by Professor Hull; in North Wales by Mr. E. D. Darbishire; near Rugby by Mr. Wilson; and in numerous localities by Messrs. Taylor, H. F. Hall, D. Mackintosh, and other contributors to the GEOLOGICAL MAGAZINE, in various papers, all testifying to the great extent and importance of this bed.

There is, perhaps, no question of greater interest in the whole A range of physical geography than the circumstances that have determined the existence on the earth's surface of large and comparatively unbroken areas of land and water, involving as it does the debateable subject of marine and sub-aerial denudation, and the careful weighing of evidence on the just apportionment of these operations and of oscillations of level that have brought about the existing boundaries of sea and land.

In my fourth Eeport to the British Association, I described, among other Crustacea, two species belonging to the genus Cyclus, one of which still remains unique. Since that date, I have, by the kindness of Professor T. Rupert Jones, F.G.S., received a number of specimens of this genus, collected by Prof. Harkness, F.R.S.; Mr, Joseph Wright, of Belfast; and Mr. J. H. Burrow, of Settle, Yorkshire; from the Carboniferous Limestone, which I now propose to describe.

I Have already described in this Magazine several new species of Brachiopoda from the Lower Greensand of Upware; since then I have obtained many more specimens, and much kind assistance from Mr. Davidson, and I now propose to give the result of the examination of the new forms in this paper; also to more fully describe a Rhynchonella from the Inferior Oolite of Lincolnshire, which have named Rhynchonella Crossii.

The following is a very brief statement of the results of nearly two months' observations on the granitic and porphyritic drift of the north and north-west of Cumberland.

Page 155, line 12 from top, for Gaudy, read Gandry.