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SAPORTA'S WORLD OF PLANTS.
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truly the action of the warm, dry climate of the Eocene, which succeeded the warm but humid climate of the Pliocene.
Other striking examples of these affinities of species are furnished by the laurel type (Fig. 8) and that of the ivy (Fig. 9). The large
Fig. 9.—Successive Modifications of the Type Hedera in the Course of the Tertiary Epoch: 1. Hedera prisca. 2. H. Philibertii. 3. H. Kargii. 4, H. Acutelobata. 5. H. MacCluri. 6. H. Strozzi.
varieties of Laurus primigenia pass insensibly into Laurus Canariensis. "It seems," says M. de Saporta, "that the narrow forms of this
