25 
Railway, and which retained its fibrous nature, although of 
considerable weight. Of true Coniferae we have Thuytes 
expansa and Brachyphyllum mammillare, from the Oolitic 
coal field, near Scarbro' ; Sphenophyllum erosum and 
Schlotheimii, from Gildersome and Wakefield; and a much 
larger species with the leaves more deeply cleft, which 
may probably be the dissection of Brongniart. Of Cyca- 
dian plants we have nine species, all from the Oolitic 
coal formation, as follows: — Cycadites Nilssoni, Zamia, gigas, 
lanceolatus, and longifolius, Pterophyllum comptum, minus, 
Nilssoni, Tenuicaulis, and Williamsonis. The last genus 
of Dicotyledonous plants, of which we have any remains, 
is Asterophyllites. These are the Asterophyllites, gali- 
oides, and foliosus, from Barnsley, tuberculata from Shelf, 
tenuifolia from Gildersome, and Equisetiformis from the 
mill-stone grit of Bramley Fall. Of Monocotyledons, (of 
which only a small number occur in the coal measures, 
and these possessing characters so indefinite as to render 
their affinity extremely doubtful,) we possess four genera, 
viz. : — Endogenites striata, (which, however, I do not 
believe is a perfect plant, but rather the central mass, 
similar to what is seen in Stigmaria,) Sternbergia, trans- 
versa, and approximata, from the millstone grit of Kirk- 
stall, Weetwood, and Bramley Fall. Two very different 
opinions are entertained as to the real nature of this 
genus. Brongniart regards such stems as analogous to 
those of Yucca or Draceena, considering the horizontal 
lines as the stations of leaves which have fallen off ; while 
from observations made on specimens found near Bir- 
mingham, by Mr. Dawes, he is disposed to consider Stern- 
bergia as the cast of the medullary cavity of stems or 
branches of large trees.* Poacites cocoina occurs both in 
the sandstone with Trigonocarpum, from Morley and Dews- 
* Proceedings of the Geological Society, vol. iv., p. 339. 
