L. Lesquereux on the Coal Formations of the United States. 197 - 
laminated shales where it was found contain together with it 
abundant remains of Lepidodendron, especially of its leaves and 
cones, - 
2. Lichens, Mosses and Liverworts. 
Brongniart and other paleontologists have already remarked 
&8 a peculiar phenomenon, the absence of every trace of fossil 
Lichens, Mosses and Liverworts in the old formation of our 
earth. A few mosses and Hepatic only have been observed in 
ra Ph iy no older than the tertiary,* and especially in pieces 
Of amber in Germany. : ; 
Many years ago, T tensa around Pottsville, Penn., a kind of 
laminated soft gray shales, splitting in thin lamellw and resem- 
oo Heer’s Flora tertiary Helvetica and also Ungers’ Genera; Dunker’s Monegr.; 
Brongniart’ il flora. ; ‘ . 
{HB Géppert atid °G. C. Berendt, die in Bernstein a 
Reste der Vorwelt—Gippert in Berichte der Berlinen Academy, 1858" Menge 
Beitraege zur Benstein flora inden Schriften der Nat. Gesell, zu Danzig. : 
