: Part IV. SECT. i. § 1] HOCENE. | 839 
poplars, hornbeams, willows, figs, planes, and maples. The markedly 
tropical climate was shown by clumps of Pandanus, with here and 
_ there a fan-palm or feather-palm, a tall aroid or a towering cactus. 
The Australian aspect of the vegetation eventually gave way to 

Fic. 400.—EocenE PLANTS. 
a, Sabal oxyrhachis (Heer) (reduced) ; 6, Nipadites umbonatus (Bow.) (3). 
one of a more American character, the Australian Proteacee being 
replaced by the American Myricacez.* 
The Eocene fauna presents similar evidence of tropical or sub- 
tropical conditions in central Europe. specially characteristic are 
foraminifera of the genus Nummulites, which occur in prodigious 
numbers in the nummulite limestone (Fig. 401), and also occupy 

Fic. 401.—Noummvtitic LIMESTONE (3). 
different horizons in the English and French Eocene basins. Tho 
assemblage of mollusca is very large, most of the genera being still 
living, though many of them are confined to the warmer seas of the 
1 J. S. Gardner, British Eocene Flora, Palzontograph. Soc. 1879. L. Crié, Recherches 
sur la végétation de Pouest de la France & l’époque tertiaire. Ann. Sciences Gévl. ix. 
(1877). 
