- we big 
a 
: x 
L, Lesquereux on the Coal Formations of N. America. 375 
far, I have never found with this coal C. Suckowii Brgt., which 
has left so many of its remains in coal 1B. A ew of the most 
: Brgt., S. Menardi 
. 
ca Bret., S. sculpta Lsqx., S. obliqua Brgt.; 8, dilatata Lsqx., S 
ert : 
are extremely numerous in its shales. This last species scatters 
ts threadlike branches in every direction and mixed with Neu- 
cosa Lsqx., the most beautiful of the genus, J. jissa qx. WV. 
plicata Sternb., NV. rotundifolia Brgt., N. Granger’ Bret., N. Cistit 
bbosa Lsqx., N. undans Lsqx., N. 
lenuinervis Lsqx., N. dentata Lsqx., N. Desorii Lsqx., N. hetero- 
_ Phylla Brgt., all these species, except perhaps the last, af for 
the first time, and are probably rs ing, “esate with this coal 
only. It has still Neuropteris crenulata Brgt., 
ed also with No. 1B. The Sphenopteridee are represented 
the characteristic type (the large leaflets) of the species of No. 
To this coal belong exclusively all the species of doubtful 
ith Hymenophyllites Gopp., viz. Hyme- 
Se eee eee a hiveuutus Lsqx. 
and 7. giganteus Lsqx. ; 
) ie om a the first rank for the number of repre- 
SeNtatives in coal No. 4th. It has Alethopteris Pennsylvanica Lsqx., 
A. aquilina Bret., A. urophylla? Brgt., (specimens incomplete,) 
