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Notes on the systematics, morphology and biostratigraphy of fossil holoplanktonic Mollusca, 7-9. 7, Clio lucai spec. nov. from the Plio/ Pleistocene of northern Italy, with notes on evolutionary lineages of the genus Clio; 8, Cavolinia grandis (Bellardi, 1873) from the Early Pliocene of New Zealand, a further example of long-distance correlation by means of pteropods; 9, apertural reinforcements in Limacina atypica (Laws, 1944) from the Miocene of New Zealand