=e 
880 L. Lesquereux on the Coal Formations of North America. 
on the contrary, we admit with most of the European a 
cture, com 
@ rather 
than to the Protopteride or ferns. As the Psaronius epee an ; 
which I have examined in Southern Ohio, I have fou 
the smallest in size, whose uncovered stems evidently oe 
long oval scars, the external character of the arborescent fert oi 
Now, admitting the species of Psaronius as true arbo wk 
ferns, the question of their distribution in the Coal Meast the 
and of the place and importance which they occupied. Hier 
vegetation of the coal epoch is still unsolved. Where dit h the 
come from, all these trunks of the same genus; all pine 
same peculiar structure; all horizontally broken in frag sonal 
varying from one inch to one foot in length, and thus panste 
at some peculiar and isolated localities, where they appear ¢ . 
‘they had been heaped by some wonderful and wnacco! 46 
sney ? I do not know in our Coal Measures of another © 
°O! a trunks of fern trees except that of Shade riveh; © 
It begins at Athens and extends southward as far as har'es 
At least, I have seen trunks of Psaronius scattered 
. Geol. 869, pl. 13, fi a oo 
Geol. nage gh oe ape name of Caulopteris insign'® 
Worthenii, sp. nov., Ill. Geol. Rept. ined., pl. 14, fig- 1 
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