ORGANIZATION OF THE FOSSIL PLANTS OF THE COAL-MEASURES. 958 
Fig. 57. Transverse section through a sporangium, sm, and its sporangiophore, sp. 
In the former, delicate tissue lining the wall is shown, and within this the 
spores. In the sporangiophore, the xylem of the vascular bundle is evident. 
C.N. 1898H. xX 60. 
Fig. 58. Corresponding longitudinal section of a sporangium and part of its sporangio- 
phore, showing the attachment. The vascular bundle of the sporangiophore 
is shown. The section is somewhat oblique. C.N.1898E. xX 60. 
PLATE 86. 
This contains figures, from photographs, of medullary casts of Calamites. For 
description, see text, pp. 896-899. 
All the figures are much reduced. F is rather more than a quarter of natural size ; all 
the rest are rather more than half natural size. 
MDCCCXC1Y.—B. 6G 
