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been confirmed since by repeated visits, are shared by Prof. Hughes, whose opinions on a matter of this kind are entitled to the greatest weight. At present he holds that it is postglacial.

The second reputed case of the discovery of Pleistocene mammalia in Glacial or Interglacial deposits is offered by those in the caves of Cefn explored and described by Dr. Falconer, Mrs. William Wynn, Prof. Hughes, the Rev. D. R. Thomas, and myself, and lately correlated (Quart. Journ. Geol. Soc. xxxii. p. 94) by Mr. Mackintosh with the Glacial strata of the surrounding district. Here,