OF THE FOSSIL PLANTS OF THE COAL-MEASURES. 
81 
PLATE IX. 
Pig. 53. A longitudinal section of part of a rootlet of Asterophyllites , enlarged 30 
diameters. 
Pig. 54. Obliquely tangential section of the outer bark of fig. 46, enlarged 90 diameters. 
Fig. 55. Tangential section of part of the outer bark of fig. 46, enlarged 90 diameters. 
Pig. 56. Transverse section of the vascular axis of a large root, exhibiting the successive 
lines of concentric growth, enlarged 9 diameters. 
Fig. 57. Transverse section of a similar root to fig. 46, but exhibiting the central pris- 
matic axis seen in the aerial stems of Asterojfhyllites and Sjphenophyllum , 
enlarged 12 diameters. 
Fig. 58. Central part of fig. 57, showing the central triangular axis, enlarged 30 
diameters. 
Fig. 59. Transverse section of the vascular axis of another species of amyeloid root 
with very large vessels, corresponding closely with the stems figs. 1 to 16, 
enlarged 30 diameters. 
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MDCCCLXXIV. 
M 
