Abstract
IT is remarkable, as Prof. Cockerell points out in NATURE of January 12, p. 42, that until his discovery of a Miocene buttercup no species, of the family Ranunculaceæ should have been recorded among the fossil plants of North America. More especially is this the case because the carpels of Ranunculus are among the commonest fossils found in deposits of Pleistocene and Pliocene age in Britain and the neighbouring parts of the Continent. Among the many lists of fossils determined by my husband and myself from such deposits, in one only, the Pliocene of Bidart (Basses-Pyrénées), is the genus not represented, and in this deposit very few species of any kind were found.
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