EXPLANATION OF PLATE XXVI. 
Blechnoxylon talbragarense, Eth. fil. 
Fig. 6. The impression of part of an internode, with a node in the round, 
bearing a series of leaf-scars, spirally arranged, and each 
pierced by a single vascular opening ; to some of the scars are 
attached the frond petioles. Between the fronds above are 
two scales similar to that seen in Fig. 5 : * 4. 
„ 8. An internode and portions of two others, more or less decorticated ; 
two nodes are indicated by the remains of two fronds projecting 
from either side the stem ; * 2%. 
„ 10. Section of the stem prepared for the microscope. The black centre 
represents either the pith, or the pith and primary wood, 
whichever may have existed ; the second zone with radii is 
the secondary wood ; the third zone of varying thickness, 
caused probably by partial decomposition and extraneous 
pressure, occupies the position of the phloem in the stem of 
Botrychium ; whilst the fourth, or outer zone, represents the 
parenchyma of the latter. The endo- and exodermal layers 
are represented by the two outermost irregular rings; highly 
enlarged. 
,, 11. A portion of the two innermost zones of Fig. 10, the dark centre 
being the pith, or pith and primary wood, as the case may be, 
and the outer radial cellular portion the secondary wood ; very 
highly enlarged. 
„ 17. The revolute end ot the right-hand side of Fig. 16 (PI. xxvii.) 
showing the supposed pedicels, one of them supporting a 
round body that may be a sporangium ; very highly enlarged. 
