MR. E. W. BINNEY ON SOME LOWER-COAL-SEAM EOSSIL PLANTS. 
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PLATE XXXI. 
Sigillaria vascularis. 
Fig. 1 (No. 2). Specimen of a stem of Sigillaria vascularis in a calcified state, found in 
the lower coal-measures of the West Hiding of the County of York, at North 
Owram near Halifax, in the middle of the Hard bed of coal, showing a front 
view of the upper part, containing the central axis, internal vascular cylinder, 
space on the outside of the latter composed of coarse cellular tissue, and 
external radiating cylinder : natural size. 
Fig. 2. Side view of the same specimen, which not only shows the upper part of the 
specimen like fig. 1, with the central axis, internal radiating cylinder, inter- 
vening space of lax cellular tissue, and external radiating cylinder, but a 
side view of the decorticated portion of the stem with irregular ribs and 
furrows, on the former of which are traces of the cicatrices left by the leaves 
of the plant : natural size. 
PLATE XXXII. 
Sigillaria vascularis. 
Fig. 1 shows a transverse section of the central axis and internal radiating cylinder of 
the same specimen, magnified 5 diameters. 
Fig. 2. A part of the same specimen, a denoting the central axis, and b the internal 
radiating cylinder: magnified 12 diameters. 
Fig. 3. A longitudinal section of the same specimen, commencing on the outside of the 
internal radiating cylinder passing through the central axis, the other portion 
of the internal radiating cylinder, the part composed of coarse cellular tissue 
generally disarranged adjoining to it, and the external radiating cylinder to 
the outside of the specimen : magnified 4 diameters. 
a a. Parts of the central axis composed of hexagonal vessels arranged with- 
out order, having all their sides marked by transverse striae. 
b b Parts of the internal cylinder, composed of hexagonal vessels in wedge- 
shaped bundles, and radiating series marked on all their sides by transverse 
striae parted by medullary rays or vascular bundles communicating from the 
outside of the central axis to the exterior of the cylinder, and probably 
extending on to the leaves. 
cc. Parts of the coarse cellular tissue, generally a good deal disarranged, 
traversed by large vascular bundles, most probably connected with the medul- 
lary rays or vascular bundles of the internal cylinder, and communicating with 
the leaves. 
