26 
bury, and the coal shale from Gildersorae. That Poacites 
was really a species of Palm is more than probable, not only 
from its appearance, but also from the circumstance of its 
being found associated with Trigonocarpum, which is sup- 
posed to be the fruit of some plant of that family. The 
well authenticated genus of Palms, Nceggerathia, of which 
the flabellata and the foliosa, though occurring in the New- 
castle and Lancashire coal fields, has never been detected 
in Yorkshire. Of the genus Trigonocarpum, we have a 
number of examples of Nceggerathii, from Dewsbury, Mor- 
ley, Wakefield, and Darton. In one mass of sandstone is a 
cluster of about forty, as if separated from one branch, and 
as we might expect to be the case if a raceme of Palm fruit 
were broken up. The other species I have recognised 
appears to be the oblongum and Dawesii, from Darton and 
Pontefract ; and another, apparently undescribed, about the 
size of a nectarine. 
From the second great division, Cellulares, to which the 
principal mass of the plants formiug the fossil flora belong, 
I shall briefly enumerate such species as occur within our 
limits. Of the genus Equisetum, two, the columnaris and 
laterale, have long been known in the upper carboniferous 
series of the Yorkshire coast; but the dubius, although 
occurring in the Lancashire coal-field, has never, I believe, 
been observed here. In Calamites, however, this district is 
particularly rich, no less than fourteen species having been 
detected, examples of nearly all of which are comprised in 
the valuable series belonging to this Society, and that of the 
Philosophical Society of Leeds, exhibiting both the terminal 
portion, the root, crushed and contorted specimens, &c. 
These consist of cannseformis and approximatus from 
Chapel Allerton and Wentworth; decoratus, pachyderma, 
Steinhaueri, ramosus, and undulatus, from Low Moor; 
dubius, insequalis, ornatus, Suckowii, and arenaceus, from 
