L. Lesquereux on the Coal Formations of the United States. 195 
coal measures with remains of fishes and of marine shells. But 
describing such remains and referring them to marine plants 
would be only an hazardous hypothesis. The stems and leaves 
of some plants of the coal of Pomeroy are covered with a brown- 
ish, thick epidermis resembling the thick leaves of some Fucacee. 
ut this kind of skin is mixed with remains of ferns and cannot 
be referred to Fucoides without a better proof than this leathery — 
appearance. Prof. Geinitz does not mention any Fucoides in his 
fossil flora of Saxony. 
2, Funginee (Mushrooms). 
As far as the evidence of fossil plants can be trusted, it seems 
to prove that species of the mushroom family were living 
during the period of the formation of the coal. It is especially 
Some of those small, mostly round species of the Hypoxylee tribe, 
_ that have been found attached to leaves and stems of fossil 
ferns, One of them is described by Prof. Géppert (Syst., p. 
262, t. 36, fig. 4), with the name of Hzcipulites Neesit on the 
leaves of Hymenophyllites Lobelit. The same is described again 
by Geinitz ( Verst, p. 8, pl. 23, fig. 18,) on the leaves of Sphenop- 
teris tridactilites. In this last author we have also, belonging to 
the same tribe, a Depasites Rabenhorsti and especially the Gyro- 
maces Ammonis, Gipp. This last species is the only one that has 
been found heretofore in our Coal measures of America and that 
It abounds on the leaves, the 
of fossil stem from Carbondale, Penn. (Specimen No. 711 of 
Géppert, then de- 
about the tenth of an inch 'in diameter, with the spires progress- 
ively enlarging and greatly resembling our Planorbis parvus Say) 
4small shell now living in fresh water under the leaves and on the 
Stems of floating plants. Its outer end, which in the figures of 
European authors is blunt and obtuse, appears, on our specimens, 
