258 Proceedings of the Royal Physical Society. 
XVI. On some New Species of Fossil Plants from the Lower 
Carboniferous Rocks of Scotland. By Ropert Kinston, 
F.RS.E., F.G.8. [Plates IV.—-VI.] 
(Read 20th December 1893.) 
This paper may be regarded as an appendix to the Address 
I had the pleasure of delivering last month. 
At the end of my Address I gave a list of all the species 
of Carboniferous plants I had yet identified in Britain, 
showing the horizons from which they had been derived. 
In that list I included the following six new species, which 
I now describe. 
Plumatopteris elegans, n. gen, and n. sp. 
Sphenopteris Dunsii, n. sp. 
Rhacopteris subcuneata, n. sp. 
Sigillaria Youngiana, n. sp. 
Cardiocarpus nervosa, n. sp. 
Cardiocarpus caudatus, n. sp. 
PLUMATOPTERIS, Kidston, n. gen. 
Description.—Frond bipinnate (or tripinnate ?), pinne 
alternate, oblong or linear oblong, obtuse, entire or sinuous 
or more or less lobed, nerves numerous, simple or bifurcated, 
springing from the midrib at an acute angle and running to 
the margin with only a slight curvature in their course. 
Remarks.—The fern which forms the type of this genus 
finds its nearest allies in Archwopteris Tschermaki, Stur, 
and Archwopteris Dawson, Stur,? and perhaps these two 
species might find a place in Plumatopteris. 
In the absence of any knowledge of the fructification of 
these three fossils, and the entirely different mode of the 
pinnule cutting, none of them have any claim to be placed 
in Dawson’s Archewopteris, of which the outstanding character 
is the fructification.* . 
1 Culm Flora, vol. i., p. 57, pl. xii., fig. 1. 
2 Jbid., p. 60, pl. xii., figs. 2, 3, 4. 
‘8 Dawson, Plants of the Erian (Devonian) and Upper Silurian Formations 
of Canada, part li., p. 98, 1882. See also Kidston, Trans, Geol. Soc. of 
Glasgow, vol. ix., p. 30, 1891. 
