Midland districts from that of the southern and northern areas in England, in which that formation is developed,—the southern exhibiting the entire series of deposits, which seem to reappear in the northern area, while in the Midland district the lower members have not been observed.
Mr. Judd remarked that the conditions of deposition in the North and South had been different; the Red Chalk increases northwards, from 4 feet at Hunstanton to 30 feet at Speeton. He considered that the Carstone does not represent the Tealby series of Lincolnshire, and that it is probably Aptian or Upper Neocomian, but containing in its lowest part fossils derived from the disintegration of Lower Necomian beds, in the same manner as the deposits of phosphatic nodules at Potton and Upware.
Mr. Whitaker objected to the use of chemical characters in the identification of beds, and thought that the presence of the same fossils did not necessarily prove the identity of the Red Chalk and the Gault.
Mr. Wiltshire, in reply, maintained the sufficiency of the Palæontological evidence, that furnished by the species of Ammonites being especially remarkable.
February 24, 1869.
Henry Cook, Esq., M.D., H.M. Bombay Medical Service; Lieut. William Innes, R.E.; H. R. Moiser, Esq., Heworth Grange, York; R. Hill Tiddeman, Esq., B.A., Oriel College, Oxford, and Samuel Allport, Esq., Snow Hill, Birmingham, were elected Fellows.
The following communication was read:—
On the Distribution of the British Postglacial Mammals. By W. Boyd Dawkins, Esq., M.A., F.R.S., F.G.S.
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§ 1. Introduction.
§ 2. Distribution through England and Wales. § 3. Authorities. § 4. Notes on Species. § 5. Identity of Mammalia of Caves with those of River-beds. § 6. Predominant Animals. § 7. Postglacial Mammals of Scotland and Ireland.
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§ 8. Cause of unequal distribution.
9. Relation of Postglacial to Preglacial Mammals. § 10. Relation of Postglacial to Prehistoric Mammals. § 11. Characteristic Postglacial Mammals. § 12. Age of the Lower Brick-earths and the Deposit at Clacton. § 13. Postglacial Climate.
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§ 1. Introduction.—The materials on which this essay is founded are the result of ten years' work on the Pleistocene Mammalia of Great Britain, during which every public Museum and private collection of note in the United Kingdom has been examined, either by myself or by some one on whose judgment I could depend. To
