37 
dendron, found in one of the quarries on Swinton Common, 
near Rotherham, which is named Lychnophorites superus, 
from an impression that it was a Syngenesious plant, which 
I conceive to be an error, and, therefore, insert it amongst 
the Lepidodendra. In addition to the plants I have 
enumerated, there are several whose real affinities are very 
obscure, as, for instance, Hydatica columnaris, and pros- 
trata, and Myriophyllites gracilis, from Elsecar ; Pinnularia 
capillacea, from Shelf ; Dictyophyllum rugosum, Solenites 
furcatis, and Murrayana, Sphoerococcites arcuatus, Sphoerida 
paradoxa, and Tympanophora simplex and racemosa, from 
Gristhorp and Cloughton. 
Such is a brief list of the fossil flora of the Yorkshire 
coal-field, to which, I have no doubt, considerable additions 
might be made, if the various coal-pits in the district were 
examined with as much zeal and scrutiny as those in New- 
castle and in Lancashire, where such harvests of specimens 
have repaid the labourers ; the number of genera and 
species being much greater in both the other localities than 
with us; that is, confining our observations to the lower 
coal series, with which alone a comparison can be fairly 
made. As it is very desirable that we should possess a per- 
fect list of all the plants which occur in the Yorkshire coal- 
field, I shall feel particularly obliged by additions to, or 
corrections of errors, which the Members of this Society, 
more especially owners of collieries, may be able to transmit 
me; or examples of doubtful species, by which means the 
Museum of the Geological and Polytechnic Society of the 
West Riding of Yorkshire may become the depository, 
as it surely ought to be, of an extensive and entire series 
of all the vegetable remains which occur in this district, 
which would supply information and instruction of the most 
important kind — geologically, as exhibiting the local treasures 
of the county, and morally, by means of these silent moni- 
