ORGANIZATION OF THE FOSSIL PLANTS OF THE COAL-MEASURES. 701 
Fig. 10. Part of transverse section of the root shown in photograph 3. C.N. 1891. 
x 100. (See p. 689.) 
x*, Outer part of secondary wood. 
cb, Cells of the cambium, adhering to the outer surface of the wood. 
ph, Phloém, separated from the wood by a gap, due to the tearing of the 
cambium. 
en, Endodermis, probably double, including also the thin-walled cells 
adjacent to the phloém. 
Beyond en, a portion of the inner cortex is shown. 
Fig. 11. A part of the cortex, from the same root, in transverse section. The whole 
thickness is shown. The inner cortex is thin-walled. C.N. 1891. x 40. 
(See p. 690.) 
lz. Lacunar zone of middle cortex; the lacune are obliterated by the 
crushing in of the trabecuie. 
ep, Epidermoidal layer, here multiseriate, probably owing to commence- 
ment of periderm-formation. 
