There is perhaps no better collecting-ground in England for Lower Cretaceous Fossils than Folkestone, nor any which has been more industriously explored. The last fossil from this locality recorded in our Journal was in 1867 (Geol. Mag., Vol. IV., p. 65, PI. V.), when Prof. Huxley described the remains of a new reptile from the Chalk-marl east of Copt Point, Folkestone, under the name of Acanihopholis horridus. In the same Journal will be found (at p. 67) an interesting notice by Mr. Robert Etheridge, F.E.S., Patæontologist to the Geological Survey of Great Britain, of the stratigraphical position of the Cretaceous series at this locality, from whence Mr. Griffiths, the intelligent collector, obtained these and the many other fossils with which the cabinets of the Rev. Thomas Wiltshire, M.A., F.G.S., Mr. J. Starkie Gardner, F.G.S., and those of so many other private collectors as well as of our public Museums are stored.

Professor Ramsay in a recent paper put forward the notion that the Magnesian Limestone and its associated beds of the north-east of England were formed, in part at least, by chemical precipitation in an inland sea. Given such a sea, without outlet, and with streams flowing into it holding in solution the necessary salts (bicarbonate of lime and sulphate of magnesia would answer the purpose), it is clear that by continued evaporation a state of saturation would at length be brought about, and precipitation would take place, and Dr. Sterry Hunt has shown that dolomite and gypsum would be the probable products.

The genus Endoceras was proposed by Hall (Pal. N. York, vol. i., p. 58) for a group of Orihocerata; having “a large siphunele, mostly lateral or excentric, marked or ridged on the outer surface by the septa, which, from their oblique direction, give it the appearance of a tube with spiral lines. Within this siphunele are one or more very elongated eonical tubes, often one within the other to the number of four or five.” The leading point, then, in the definition of Endoceras is the possession of a multiple siphunele, composed of two or more concentric tubes placed one within the other, each tube having the form of an elongated cone.

In my last communication to the Magazine I made an attempt to correlate the Scottish Glacial deposits with the equivalent accumulations in Switzerland, Northern Europe, and North America, my purpose being to show that the same order of succession holds good in all those regions where the “Drifts” have been examined, and that in each case there is no proof whatever of any warm period having intervened since the deposition of the clays with Arctic shells and the decrease and disappearance of local glaciers. In the present and a subsequent paper I propose to treat of the superficial deposits of Ireland and England, more especially those of the latter country.

My attention having been directed, during the construction of the Main Outfall Sewer at Birkdale, to the Post-Glacial deposits underlying the great plain between Waterloo and Crossens, and having, through the execution of numerous other works in the district, peculiar advantages for prosecuting investigations in Post-Glacial Geology, I am induced to lay before your readers several interesting facts, and also, as I venture to think, some important deductions therefrom.

The majority of geological formations have certainly been deposited in what was at their respective periods the sea; but Sir Charles Lyell, Prof. Geikie and others have shown that the action of the waves and currents upon sea-cliffs, and their power to remove matter from above to below the sea-level, is very insignificant compared with that effected by atmospheric agents, by rain and rivers, in the interior, in consequence of the immensely more extended area upon which these act; so that, even supposing the height of ancient cliffs to have been very much greater than those of the present time which have been considered to average not more than twenty-five feet, it appears difficult or rather impossible to attribute the origin of the materials of which they consist, sometimes amounting to several miles in thickness, to the erosion of coast-lines, with the exception of a comparatively thin stratum situated at their base. Those who have ascribed their origin to marine denudation have given no satisfactory explanation of the manner in which the débris from the disintegration of the cliffs has been redistributed to form these strata.

The Foraminifera of the Chalk were treated of in Nos. 89 and 90 of the Geol. Mag., November and December, 1871, with the view of aiding collectors and authors in their arrangement of these numerous and puzzling microzoa in their catalogues and cabinets. We shall be rendering further service to students, if we refer them to the Rev. Henry Eley's clear and useful, though somewhat hard, drawings of the Foraminifera usually found in the English Chalk and Flint. These were published ia his “Geology in the Garden; or, the Fossils in. the Flint Pebbles.” 8vo. London, 1859.