342 Count Gaston de Saporta on the Temperature 



formed by the quaternary deposits, furnishes the following list, 

 which is nearly complete : — 



Alnus glutinosa, Linn. Travertins of Montpellier. 



Betula prisca, Ett. Tuscan Travertins. 



Carpinus betulus, Linu. Cannstadt. 



Corylus avellana, Linn. Travertins of Provence. 



Quercus pubescens, Wild. Travertins of Provence. 



Fagus sylvatica, Linn. Tuscan Travertins. 



Ulmus campestris, Linn. Travertins of Tuscany and Provence. 



Celtis australis, Linn. Travertins of Provence. 



Populus alba, Linn. Ditto. 



Salix viminalis, Linn. Ditto. 



caprea, Linn. Ditto. 



Platanus aceroides, Gopp. Tuscan Travertins. 



Fraxinus ornus, Linn. Ditto. 



Hedera helix, Linn. Travertins of Tuscany and Provence. 



Cornus sanguinea, Linn. Ditto. 



Jjiquidambar europceum, Al. Br. Travertins of Tuscany. 



Acer opulifolium, Linn. Travertins of Tuscany and Provence. 



Juglans gravicefolia, Gaud. Travertins of Tuscany. 



" regia, Linn. Travertins of Provence. 



Crataegus oxyacantha, Linn. Ditto. 



Cercis siliquastrum, Linn. Travertins of Tuscany and Provence. 



In this list only a very small number of genera are wanting. 

 It must even be remarked that Ostrya is difficult to distin- 

 guish from the hornbeam without the fruits, and that 

 the chestnut, frequenting siliceous soils, must have kept at a 

 distance from the locahties where the travertins were formed. 

 On the other hand, among the genera which have since become 

 extra-European, Juglans, Liquidambar, and Plata7ius show them- 

 selves in proof of their late elimination ; the genus Liriodendron 

 is the only one that does not make its appearance, as, no doubt, 

 it had already disappeared from Europe. 



The seventh horizon, the Pliocene, is richly represented by 

 the floras of Schossnitz, Gleichenberg, Senegaglia, and the Val 

 d'Arno ; it furnishes the following list, which includes only the 

 most prominent species of the period : — 



Alnus Kefersteinii, Gopp. Tuscany. 

 Betula macrophylla, Gopp. Schossnitz. 



prisca, Ett. Tuscany. 



Ostrya Prasili, Ung. Gleichenberg. 

 Carpinus pyramidalis, Gopp. Schossnitz, Tuscany. 

 Corylus Wickenburgi, Ung. Gleichenberg. 

 Quercus drymeja, Ung. Tuscany. 



lucumonum, Gaud. Tuscany. 



mediterranea, Ung. Tuscany. 



Fagus Deucalionis, Ung. Senegaglia. 



attenuata, Gopp. Schossnitz. 



Castanea Kubinyi, Kor. Tuscany. 

 Ulmus fVimmeriana, Gopp. Schossnitz. 



