OF THE FOSSIL PLANTS OF THE COAL-MEASURES.—PART XIII. 
301 
figure. 
Plate. 
1 
21 
2 
22 
3 
21 
4 
21 
5 
22 
6 
21 
7 
22 
8 
22 
9 
23 
10 
21 
11 
22 
12 
23 
13 
22 
14 
22 
15 
22 
16 
21 
Heterangium Tiliceoides. 
Transverse section of a stem. X 15 diameters. Cabinet number 
1302, pp. 289, 290, 291. 
Portion of a transverse section of another specimen. X 12 
diameters. C. N. 1303, pp. 290, 291. 
Portion of a transverse section of a medullary axis. X 103 
diameters. C. N. 1301, p. 289. 
Portion of a transverse section showing the phloem of a vascular 
wedge or bundle, and parts of two phloem rays. X 48. C. N. 
1303, p. 290. 
Part of a transverse section with two wedges or vascular bundles 
being pushed outwards for some unknown purpose. X 24. 
C. N. 1303, pp. 290, 293. 
Part of a transverse section of the outermost cortex. X 31. 
C. N. 1303, pp. 290, 291. 
Transverse section of a pair of the twin vascular bundles passing 
outwards through the outer bark. X 51^. C. N. 1623, p. 290. 
Two other twin bundles. X 20 diameters. C. N. 1302, pp. 290, 291. 
Obliquely longitudinal section through another stem, showing the 
tissues of the medullary axis, the exogenous xylem, phloem, and 
part of the inner cortex. X 36 diameters. C. N. 1628, p. 291. 
Tangential section through the phloem of a fibro-vascular bundle. 
X 14 diameters. C. N. 1622, p. 291. 
Vertical radial section through the external cortex, showing three 
of the horizontal bands of sclerenchyma. X 31 diameters. 
C. N. 1304, p. 292. 
Vertical section through a stem, giving off a lateral branch, which 
is intersected in an obliquely transverse manner. C. N. 1622,p. 292. 
Transverse section through one primary phloem ray and portions 
of two vascular wedges, each of which latter is giving off a 
cluster of tracheids to supply the vascular elements of a lateral 
branch. X 51 diameters. C. N. 1619, p. 292. 
A spiral vessel from a small bundle passing outwards to some 
lateral organ. X 112 diameters. C. N. 1301, p. 293. 
A reticulated vessel from the exogenous xylem of a stem. X 112 
diameters. C. N. 1621, p. 293. 
A vessel with bordered pits from the exogenous zone of a stem. 
X 187 diameters. C. N. 1621, p. 293. 
