FLORA OF THE CAINOZOIO PERIOD. 



89 



these cones had been considered to be Cjcadean, but their 

 internal structure indicates that they are coniferous. Pinites 

 ovatus is one of these cones (Fig. 92). The Cupres- 

 sinea3 are found in the Tertiary beds only. Taxodiese are 

 represented by Sequoiites (Plate II. Fig. 7) in the Cretaceous 

 and Eocene strata. Pence australis of Van 

 Diemen's Land and P. Pritchardi of Ire- 

 land are Tertiary plants. The Pence of 

 Eigg (P. Eggensis), according to Geikie, is 

 also Tertiary, and not Oolitic. Isoetes is 

 mentioned by Schimper as a Tertiary genus. 

 Although the vegetation throughout the 

 whole of the Tertiary period presents pretty 

 uniform characters, still there are notable 

 differences in the generic and specific forms, 

 and in the predominance of certain orders at different epochs. 

 Brougniart does not entirely agree with linger as to these 

 epochs. Many of the formations classified by Unger in the 

 Miocene division he refers with Raulin to the Pliocene. He 

 divides the Tertiary period, as regards plants, into the Eocene, 

 IVIiocene, and Pliocene epochs, and gives the following com- 

 parative results from an examination of their floras : — 



Fiir. 92. 



In the Eocene formation the fossil fruits of the Isle of 



Fig. 92. Pinites ovatus (Zamia ovata of Lindley and Hutton), an 

 ovate cone with a truncated base and obtuse apex, nearly allied to tlie 

 stone-pine. 



