Lists Eocene foraminifers collected from the Herouval zone at Herouval, Oise, France, notes their relative abundance, and describes two new species (Spiroloculina morelleti and Discorbis herouvalensis). The presence of species which had disappeared by the Lutetian, and the absence of large Rotaliidae and Miliolidae common in the Lutetian of the Paris basin suggest that this zone is Cuisian in age.

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