602 
ME. E. W. BINNEY ON SOME LOWER-COAL-SEAM FOSSIL PLANTS. 
d d. Parts of the external cylinder, composed of tubes or elongated utricles 
of a quadrangular form arranged in radiating series, and parted by large 
vascular bundles surrounded by coarse muriform tissue. 
Fig. 4. A tangential section of a portion of the same specimen, magnified 4 diameters. 
b. Parts of the internal cylinder, showing a section of the medullary rays or 
vascular bundles, b”. 
c. Portions 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. 
d d. Parts of the external cylinder, composed of tubes or elongated utricles 
of a quadrangular form arranged in radiating series, and parted by large vas- 
cular bundles surrounded by coarse muriform tissue. 
Fig. 4. A tangential section of a portion of the same specimen, magnified 4 diameters. 
b b. Parts of the internal cylinder, showing a section of the medullary rays 
or vascular bundles, b". 
c c. Parts of the coarse cellular tissue somewhat disarranged, but showing 
some structure, and traversed by vascular bundles. 
d d. Parts of the external radiating cylinder, showing the large oval bundles 
of vascular tissue (d 1 ) surrounded by coarse muriform tissue. 
PLATE XXXIII. 
Sigillaria vascularis. 
Fig. 1 shows a longitudinal section of a portion of the same specimen, exhibiting the 
central axis composed of barred vessels, a «, parted by smaller vessels divided 
by horizontal septse, a!, as well as portions of the internal cylinder composed 
of barred vessels, b b : magnified 15 diameters. 
Fig. 2 represents two of the barred vessels of the central axis as they would appear if 
not ground away in the slicing and polishing, magnified 45 times. 
Fig. 3. A tangential section of a portion of the same specimen across a part of the in- 
ternal cylinder, showing the medullary rays or bundles (b") traversing the 
cylinder b : magnified 15 diameters. 
Fig. 4. A longitudinal section of a portion of the external cylinder d, composed of tubes 
or elongated utricles arranged in radiating series, magnified 10 diameters. 
Fig. 5. A tangential section of a portion of the external cylinder, showing the large 
vascular bundles of an oval shape, d ', surrounded by coarse muriform tissue 
which traverse it : magnified 10 diameters. 
