a Hazel (different from that now existing), Scirpus lacustris, 
Phragmites communis, and Menyanthes trifoliata. * 
The glacial epoch followed, during and since which there has 
= been little generic change in the vegetation of the 
* globe. 
_ 82. So much for the main facts hitherto regarded as estab 
lished in Vegetable Paleontology. They are of little value #® 
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somes of structure or specialization of organs, as representel” 
y the successively higher groups in the natural method of clas 
Sification. Secondly, that the earliest recognizable Cryptogas - 
* During the printing of this sheet I have received from my friend M. pry 
dolle a very interesting memoir on the tertiary fossil plants of Tuscany, by 
Gaudin and the Marquis C. Strozzi, in which some of the genera here alladed a 
are described. The age of these Tuscan beds is referred by Prof. O. Heer to 8% 
or caution, to existing genera, and this in almost all cases from imperfect ~ 
alone! Without questioning the good faith or ability of the authors of this relly ; 
valuable and interesting memoir, [ cannot withhold my protest against this Prine 
sof making what are at best little better than surmises, appear a poe Oe 
sng Sapit, 
aa. se ie te foliage to existing genera of L i Mem, Soe. He 
Vet. Se. Nat. 1857; Bibl. Univers. Genev., August, 1858. oe ee | 
