L. Lesquereux on the Coal Formations of N. America. 65 
er margin being horizontally truncate and regularly wavy-den- 
ticulate by the percurrent and slightly emerging nerves. The 
typical affinity of this plant is unknown. It is perhaps more re- 
lated to Cordaites or even to Salisburia than to a fern. 
The second genus peculiar to the American coal-flora is my 
Scolopendrites, represented, like the former, by a single species; 
Scolopendrites dentata Lsqx., of which fragments only have been 
ound, The name has no relation to the nervation of the leaf, 
but to its outline. This leaf is apparently five to six inches 
long, more than an inch broad, lanceolate, deeply cut by obtuse 
Gopp., Woodwartites Gépp., are no peculiar types. hus, consid- 
ering their generic distribution, the coal-plants of Europe and of 
rth Ameri 
would be too long and tedious, perhaps, to take one by one 
and compare all the American species with those of Europe, 
SECOND SERIES, Vo, XXX, No. 8&—JULY. 1860. . 
9 
