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Fig. 8. 
DR. D. H. SCOTT ON BOTRYCHIOXYLON PARADOXUM. 
EXPLANATION OF THE PLATES. 
All figures, except fig. 19, are of Botrychiorylon paradoxum. The photographs 
frequently need to be examined with a lens. 
PLATE 37. 
Photographs by Mr. W. Tams. 
Lowest transverse section of the stem. aph., branching aphlebia, half of which is shown in fig. 14; 
aph.', triple aphlebia shown in fig. 15. Several appendages (probably roots and aphlebia- 
strands) are in connection with the stele. Periderm (fig. 3) is seen on the right. x about 9. 
Slide 2459. 
. Next section above. Roots are seen passing out through the cortex. The large outgrowth, l.t., 
from the stele appears to be a leaf-trace. x 74. Slide 2460. 
Outer cortex and periderm from the right of fig. 1. x about 40, Slide 2459. 
. Stem and petiole, from the transverse section next above the dichotomy of the stem. r., branching 
root. x about3. Slide 2464. 
PLATE 38. 
5. Transverse section next above fig. 2. The leaf-trace, /./., is seen in the cortex, see fig. 9. The 
outgrowth r. from the stele is probably the base of a root. x 71. Slide 2461. Photograph 
by Mr. Tams. 
. Transverse section next above the dichotomy, through the vertical branch. The smaller strands 
(as at aph.) in the cortex are those of aphlebiz ; the larger one, r., is a root. x 13. Slide 2464. 
Photograph by Mr. J. Lomax. 
Stele from last section enlarged. cb., cambium. A root-strand is passing out from the stele. 
x 35. Slide 2464. Photograph by Mr. L. A. Boodle, F.L.S. 
PLATE 39, 
Photographs by Mr. W. Tams. 
Stele from the uppermost transverse section, showing primary xylem and incomplete secondary 
zone. pæ., probable protoxylem. The large cortical cells below are connected with a wound. 
x 70. Slide 2465. 
. Leaf-trace shown in fig. 5, showing primary and secondary wood, cambium, and phloem. 
Pz., protoxylem. The top of the figure is towards the outside of the stem. x 50. Slide 2461. 
. Longitudinal section through the dichotomy of the stem. m.r., medullary ray. X 16. 
Slide 2462. 
. Transverse section of the petiole shown in fig. 4, showing the bundle, v.b., and the cortex with 
a sclerotic zone. x 16. Slide 2464. 
. Next transverse section of the petiole above fig. 11; an aphlebia, aph., is seen on the right. 
.X 16. Slide 2465. 
. Vascular bundle from fig. 12. Observe the sinus at each end of the xylem. Compare fig. %4. 
x 44. Slide 2465. 
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