FOSSIL FLORA OF SOUTHERN PORTION OF THE YORKS. COALFIELD 351 
seam occupies a considerably lower position in the Middle Coal Measures 
than the Top Hard and Barnsley Thick Coal from which were derived 
the greater number of previous determinations from this field, both 
in Yorkshire itself and from the southern extremity in Nottinghamshire 
and Derbyshire. 
The following is a list of the new records : — 
NAME. 
Equisetales. 
Calami tes rainosns Art. 
Calamophloios verticillaiiis (L. cS:H.) 
FiLICALES AND PtERIDOSPERME.T: 
Spkenopteris Potter i Zeill. 
S. Latirenti Andra 
5. {Zeilleria) avoldensis Stur 
S. {Zeilleria) delicatitla Sternb. 
Lycopodiales. 
Lepidodendron lycopodioides Sternb. ... 
Sigillaria pHncipis Weiss 
S. elongata ^rongn. 
S. discophora Kidst. 
Lepidophloios laricinus Sternb. 
Cordaitales. 
Cordaites principalis (Germar) 
Bond's 
Main Pits. 
The following is a complete list of the sj^ecies now known from 
Bond's Main and Grassmoor Collieries, and may be regarded as an 
example of the flora of the lower part of the Middle Coal Measures of 
the Yorkshire field. 
NAME. 
.Authority. 
(•) 
Bond's 
Main Pits. 
Grassmoor 
Pits. 
Equisetales. 
Calami tes ramosns Art. ... 
A. 
X 
C. undulatus Sternb. 
A.:\i.H. 
X. 
'Calamophloios verticil latits (L. & H.) ... 
A. 
X. 
Annul aria radiata (Brongn.) 
A.M.H. 
X. 
Calamocladus charaeformis (Sternb.) ... 
A.M. 
X. 
Pinnularia columnaris (Art.) 
M. 
X. 
* "A" indicates that this plant is recorded by the Author 
" H " by Mr. Horwood ; " M " by Dr. Moysey. 
