L. Lesquereux on the Coal Formations of North America. 385 
ders, covered with a thin but strong bark. No remains at all of 
roots, of fruits, or of leaves, are found in this sandstone and in 
connection with the Calamites. 
It is very difficult to establish the relation of the cones of 
Asterophyllies with the branches, to which they are rarely found 
attached, and thus to fix the true species. For this reason, I 
think it more convenient, though less scientific, to give different 
names to each of the parts of the plants, as long as they have 
not been found in evident connection. The roots and floating 
filaments, formerly known under the names of Hydatica prostrata 
rt., are now considered by Prof. Geinitz as the roots of Aséero- 
phyllites foliosa Lindl. They have been found attached to large 
Stems apparently belonging to this species. The roof shales of 
the coal at Pomeroy, Ohio, are, in some places, covered with these 
tadiculose filaments, and, though I have not seen them attached 
to the stem, the abundance of branches of Asterophyllites foliosa, 
und on the same shales, confirms the views of the celebrated 
German author. But Mr. Geinitz also refers the cones known 
as Asterophyllites tuberculata Ll. & H., to the same species, and 
€se cones are not found at Pomeroy. Per contra, they abound 
on the shales of the red ash coal at W. W. Woods and at the 
em vein of Port Carbon, near Pottsville, where Asterophyllites 
equisetiformis is plentiful, and where I have not found Aséerophyl- 
lites foliosa or Hydatica. At W. W. Woods, with numerous re- 
Mains of Calamites, the three species of cones named Astero- 
phyllites tuberculata Ll. & H., Asterophyllites aperta Lsqx., and 
Asterophyllites lanceolata. Lsqx., are also in great quantity of 
ments 
_ , A beautiful species of Sphenophyllum, S. bifurcatum Lsqx., has 
. been found in ms coal inferior to the Millstone Grit re, Arkan- 
_ Sas. It may be the same species as the small specimen figured 
_ and described in the Pennsylvania Report as rophilum trifo- 
: hatum Lsqx. Difficult as it is to fix the specific characters of a 
__ Sphenophyllum, this species, from the great number of specimens 
_ €Xamined, may be considered as a true one. It shows that the 
__ leaves of this genus are united at the base by a narrow margin 
_ his union exists for the leaves of Asterophyllites and of Annu- 
_ “ma; and thus their whorls of leaves are more of the nature of 
. Psi, deeply cut in laciniz of various forms, than of true 
— deaves 
Since the time (1854) when I delivered my report on the 
fossil plants of Pennsylvania, I have seen nothing in our fossil . 
_ Plants to change my opinion concerning the fructifications 
_ f the genus Annularia. I supposed then, and still suppose, 
_ "at these fructifications were borne on the top of the leaves, 
_ Within the inflated and hollowed medial nerve, in a kind of 
el-like cavity, like the spores of some species of Hymeno- 
