ARBEB : FOSSIL FLORA OF SOUTH YORKSHIRE COALFIELD. 145 
1893. Calamites approximatus, Kidston, Trans. Roy. See, Edinb., 
Vol. XXXVII., p. 311, Plate II., Fig. 5-6. 
1898. Calamites (Calamitina) approximatus, Seward, Foss. Plants, 
Vol. I., p. 369, Fig. 100. 
1901. Calamites approxim^itiLS, Kidston, Proc. Yorkshire Geol. 
and Polytech. Soc, Vol. XIV., Plate XXXV., Fig. 2. 
1903. Calamites approxim/itus, Arber, Quart. Joum. Geol. Soc, 
Vol. LIX., p. 5, Plate I., Fig. 3. 
The Calamite pith-cast, figured on Plate XIII., Fig. 3, possess- 
ing very short intemodes, with which somewhat longer internodes 
bearing a ring of branch scars, occasionally alternate, is a fairly 
frequent fossil in the British Coal Measures. At the present time, 
there appears to be some difficulty as to the name which should 
be applied to this plant. The name Calamites approxim^tiLs'^ was 
first instituted by Schlotheim^, who did not, however, figure an 
example. It has been pointed out by Zeiller and Kidston that 
pith-casts, such as those since figured by Brongniart and others 
(see above) under this name, do not agree with Schlotheim's 
description of his plant, whatever it may have been. Kidston^ 
has proposed that Stur's name Calamites waldenburgensis '" should 
be applied to such fossils as those here figured ; though it seems 
probable that two species of pith -cast were included by Stur 
under this name. On the other hand, it appears to me preferable 
to maintain the name C. approximutus , which has become estab- 
lished, and this can be easily done by ignoring Schlotheim's 
diagnosis which was imperfect, because it was not illustrated by 
a figure, and taking the specimens described and figured by 
Brongniart, as the types of Calamites approximxitus. 
Erem^pteris mx>yseyi, sp. nova. 
Plate XIV., Figs. 1 and 2. 
A single specimen, in a nodule from the ^liddle Coal Measures 
of Digby Clay Pit, Kimberley (Nottinghamshire), on the horizon 
of the Top Hard Coal, was collected by Dr. Moysey, which appears 
to me to be a new species of fern-like frond, referable to the genus 
1 Schlotheim, Petrifactenkunde, p. 399. 1820. 
2 Kidston, Trans. Roy. Soc. Edinburgh, Vol. XL. p. 789, 1903. 
3 Stur, Steinkohl. Calamarien, Pt. II., PI. XXV., Fig. 1, 1887. 
