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At the base of this upper division of the Speeton clay there occurs a layer of large Septaria, formerly worked for the manufacture of cement. This bed is crowded with fossils, especially Ammonites, one species of which, three feet in diameter, was observed by Mr. Judd. Pecten cinctus, Sowerby. Middle and Lower Neocomian. Mr.

Lower Neocomian Lower part of Speeton clay: Part of Wealden beds of Kent, Surrey, Sussex, Hants, and Dorset. In Western France, the Alps, the Carpathians, Northern Italy, and the Apennines, an extensive series of rocks has been described by Continental geologists under the name of Tithonian.

A beautiful view from the churchyard includes the whole sweep of the bay, cut off sharply by the Brig on the left hand, and ending about eight miles away in the lofty range of white cliffs extending from Speeton to Flamborough Head.

The middle division of the Speeton clay, occurring at Speeton below the cement- bed, before alluded to, is 150 feet thick, and contains about 39 species of mollusca, half of which are common to the overlying clay. Ammonites Noricus, Schloth.

But some fragments of them occur beneath the Neocomian or Speeton Clay on the coast of Yorkshire, containing many more fossils common to the Portlandian of the Continent than does the same formation in Dorsetshire. The Kimmeridge Clay consists, in great part, of a bituminous shale, sometimes forming an impure coal, several hundred feet in thickness.

Flora of the Wealden. Upper Neocomian Greensand of Folkestone, Sandgate, and Hythe, Atherfield clay, upper part of Speeton clay: Part of Wealden beds of Kent, Surrey, Sussex, Hants, and Dorset. Middle Neocomian Punfield Marine bed, Tealby beds, middle part of Speeton clay: Part of Wealden beds of Kent, Surrey, Sussex, Hants, and Dorset.

Atherfield Clay. Similarity of Conditions causing Reappearance of Species after short Intervals. Upper Speeton Clay. Middle Neocomian. Tealby Series. Middle Speeton Clay. Lower Neocomian. Lower Speeton Clay. Wealden Formation. Fresh-water Character of the Wealden. Weald Clay. Hastings Sands. Punfield Beds of Purbeck, Dorsetshire. Fossil Shells and Fish of the Wealden. Area of the Wealden.

In the lower division of the Speeton clay, 200 feet thick, 46 species of mollusca have been found, and three divisions, each characterised by its peculiar ammonite, have been noticed by Mr. Judd.

The headland itself is lower by more than a 100 feet than the cliffs in the neighbourhood of Bempton and Speeton, which for a distance of over two miles exceed 300 feet. A road from Bempton village stops short a few fields from the margin of the cliffs, and a path keeps close to the precipitous wall of gleaming white chalk.

Yellow limestone, which I have myself seen near Neuchatel, in Switzerland, represents the Lower Neocomian at Speeton.