The most representative series of fossiliferous pebbles from the Birmingham district is that in the Evans Collection, which was acquired by the National Museum of Wales in 1937 and catalogued under the numbers 37.110 GR 1–316. For the loan of this collection I am indebted to Dr. F. J. North, and material for comparison from other collections was obtained from Dr. C. J. Stubblefield, Miss J. R. Harding, and Professor L. J. Wills, who has also corrected the typescript.
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Archie Lamont (1946) studied this question.
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