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Rissoa Chastelii, Nyst, sp. Paludina lenta. Next below are fresh-water and estuary marls and carbonaceous clays in the brackish-water portion of which are found abundantly Cerithium plicatum, Lam. The lower fresh-water and estuary marls contain Melania costata, Sowerby, Melanopsis, etc. This bed contains a mixture of Hempstead shells with those of the underlying Upper Eocene or Bembridge series.
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