Among the Vienna foraminifera, the genus
Amphistegina (Figure 147) is very characteristic, and is supposed by d'Archiac
to take the same place among the Rhizopods of the Upper Miocene era which the
Nummulites occupy in the Eocene period.
The flora of the Vienna basin exhibits some species which have a general range
through the whole Miocene period, such as Cinnamomum polymorphum (Figure 138
Chapter 14), and C. Scheuchzeri, also Planera Richardi, Mich., Liquidambar
europaeum (Figure 135 Chapter 13) Juglans bilinica, Cassia ambigua, and C.
lignitum. Among the plants common to the Upper Miocene beds of Oeningen, in
Switzerland, are Platanus aceroides (Figure 141 Chapter 14), Myrica
vindobonensis, and others.
UPPER MIOCENE STRATA OF ITALY.
We are indebted to Signor Michelotti for a valuable work on the Miocene shells
of Northern Italy. Those found in the hill called the Superga, near Turin, have
long been known to correspond in age with the faluns of Touraine, and they
contain so many species common to the Upper Miocene strata of Bordeaux as to
lead to the conclusion that there was a free communication between the northern
part of the Mediterranean and the Bay of Biscay in the Upper Miocene period.
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