412 
PALAEONTOLOGY OF ILLINOIS. 
Hymenophyllites myriophyllum, Brgt. 
Yeg. foss., p. 184, PI. 55, fig. 2 
The straight, strong main rachis and its branches, like the form and divisions 
of the leaflets, entirely agree with the author’s description and figures of this 
species. Some of the terminal divisions of the pinnules appear on our speci¬ 
men as slightly inflated at the point. It is not possible to see whether this 
swelling is caused by fructification, or by the remains of some part of the half 
destroyed epidermis. 
Roof shales of the coal at Morris, contributed by Mr. S. S. Strong. 
Hymenophyllites Schlotiieimii, Brgt. 
Yeg., foss., p. 108, PI. 51. 
This species should be placed in its natural order after Hymenophyllites tri¬ 
dactylites , Brgt., but our specimen, a very fine one, is described here from the 
remarkable likeness of its divisions when deprived of their epidermis, with the 
former species. Except a few entire leaflets which have preserved their inte¬ 
gral form, the whole specimen represents merely the veins and their divisions, 
without any substance of the leaflets attached to them ; in that state, the spe¬ 
cies could easily be confounded with the former or considered as a new one. 
From the same place as the former, and due also to the successful researches 
of Mr. S. S. Strong. 
Hymenophyllites delicatulus, Brgt. 
Yeg. foss., p. 185, PI. 58, fig. 4. 
/ V 
f 
This species, also from the shales of Morris, could be admitted, by some of 
its parts deprived of their epidermis, as identical with that of the same name 
of Sternberg, which has been considered as a Cheilanthes by Groppert. The 
thin membranaceous substance of the pinnules in our Hymenophyllites , is gen. 
erally partly or totally effaced by maceration. 
