fossil Plants from Lower Carboniferous Rocks. 267 
this species is the strong vein-like markings which extend 
from the margin of the nucleus to the periphery of the wing. 
These veins are usually simple, but occasionally forked. 
The specimens which are in the Collection of the 
Geological Survey of Great Britain, Museum, Jermyn Street, 
London, were collected by Mr J. Rhodes. 
Horizon.—Calciferous Sandstone Series; Lower Limestone 
Series ; Cement Stone Group. 
Localities—Horncliffe Dean, near mill, river Tweed; south 
of Horneliffe village, Northumberland; River Coquet, } mile 
N.N.E. of Holystone, Northumberland. 
-CARDIOCARPUS BICAUDATUS, Kidston, n. sp. 
[Plate VI., Figs. 3, 4.] 
Description—General form cordate-apiculate, with two 
tail-like downward expansions of the membranous wing; 
nucule oval, acute, lenticular in transverse section, wing 
broad, smooth, entirely surrounding the seed, apiculate at 
apex, and at the base extending into two long tail-like lobes. 
Remarks.—The largest specimen, Pl. VI., Fig. 3, is 1°5 cm. 
broad and about 1:4 cm. long, measured from the sinus 
between the tail-like wings. The wings are about 5 mm. 
broad, and the two lobes are about 1 cm. long. The nucule 
is oval-acuminate, and surrounding it is a thickened vein- 
like band which extends to the apex of the two basal lobes. 
This is exhibited in both the figures of the species. These 
two vein-like structures extend upwards, round the nucule, ° 
and end in a short excurrent point as seen at Fig. 4. If we 
except the two caudate appendages, the fossil has very much 
the appearance of the seed of the elm. 
Horizon.—Calciferous Sandstone Series; (Cement Stone 
Group.) 
Locality—Long Craig Bay, about 14 mile west of Dunbar, 
Haddingtonshire. 
