264 Browne.—A natomy of the Cone and Fertile Stem of Equisetum. 
Fig. 3. Transverse section of part of the axis of Cone B of E . maximum at the level of the 
lowest whorl. Note the presence of some carinal canals and the small number of tracheides as com¬ 
pared with Fig. 1. Six traces are seen departing or passing through the cortex ; those in the latter 
are mostly descending so sharply as to be cut nearly transversely, x circa 45. 
Fig. 4. Longitudinal section of part of the axis of Cone E of E. maximum , showing the annulus, 
the downward curvature (in this case not very great) of the trace of the lowest whorl, and the straight 
course of a trace of the third whorl (this section passes between the traces of the second whorl), 
x circa 17*5. 
Fig. 5. Longitudinal section of part of the axis of Cone E of E. maximum , showing the other 
side of the section shown in Fig. 4. Note the carinal canal on the inner side of the bundle on the 
internode above the annulus, x circa 25. 
