L, Lesquereux on the Coal Formations of North America. 213 
show the real form of the dots. Both the linear and the round 
impressions are seen on the same specimens. Our species in this 
case is undistinguishable from Pecopteris arborescens. e Asple- 
ies nodosus of Géppert has been also recalled to it by Geinitz. 
P olypodites elegans, are extremely like specimens of our Pecop- 
tris unita Brot 
The fossi ig tribe are, even for the same 
He fossil plants referable to this nach sll arposeig: 
Sp species can be referred, this classification is admitted for our 
The genus Sphenopteris Bret. is still subdivided by Géppert in 
ave Sections seb here in an order contrary to that of the 
Ist, Dicheonsoicles : frond bi-tripinnate, pinnules suboblique, 
*ssile, often united together at the base, entire or =o Aa 
sately divided. Nerves pinnate, flexuous, ie t srs bed 
“nes forking or dichotomous, the superior ones simple. 
