72 L. Lesquereux on the Coal Formations of N. America. 
American basin is considerable. They follow the stratigraphi- 
cal distribution of the genus Lepidodendron, though they do not 
appear in any way related to this genus. About twenty well 
marked but undescribed species ought to be added to those : 
counted in the table. Some of them have peculiar forms with: 
out relation to any European species. One of the most remark 
able, Rhabdocarpos arcuatus Lsqx., is described and figured for 
the fourth volume of the Geological Report of the State Survey 
Owen 
a single species of Lycopodites, very rare indeed, since I found 
bracing at the base, it differs from any of the twelve European 
species of the coal yet described Dr, Newberry has not men- 
tioned any species of this genus in his catalogue. 
Asterophyllites Brgt.—As some species of this genus are repre 
analogous, but in a position contrary to that of some pines 
_ Without including the species of Dr. Newberry, the table of a 
to “ number of species common to both continents, but as 
_ much, also, to the number of Species peculiar to America. There- 
