Fig. 14. 
ji 
or 
pod 
© 
Fig. 20. 
DR. D. H. SCOTT ON BOTRYCHIOXYLON PARADOXUM, 389 
PrATE 40. 
Photographs by Mr. W. Tams. 
Aphlebia from fig. 1, seen in longitudinal section, in connection with the stem. To the left is 
a small diarch root, r. x 40. Slide 2459. 
. Triple aphlebia from fig. 1, seen in transverse section. x 40, Slide 2459. 
Root in transverse section, the continuation of the root r. seen in fig. 4. The diarch xylem- 
plate, which is somewhat incomplete, has secondary xylem, z., Periderm is shown to the 
left. x 38. Slide 2466. 
. Transverse section of Williamson's Dulesgate specimen, showing the stele with secondary 
wood and the leaf-trace. x 20. Slide 206. 
. Leaf-trace from fig. 17, showing the short antenne, a., the median primary xylem-band, æ., and 
the irregular secondary xylem, æ.’ x 48. Slide 206. 
Ankyropteris corrugata. Transverse section of a dichotomous stem, received from Mr. Lomax. 
The two steles are shown. That on the left has a band of secondary wood, w.’, chiefly on the 
left-hand side. A leaf-trace, L£., is also seen. x about 8. Slide 2715. 
PLATE 41. 
Figs. 20 & 23 from drawings by Miss G. C. Harrison, 
Figs. 21, 22, & 24 from drawings by Mr. G. T. Gwilliam. 
Inner part of stele shown in fig. 7. æ.i., internal xylem; pæ., probable position of a protoxylem 
group; p., parenchyma; w.’, secondary xylem; r.r., base of a root-strand. x 100. Slide 
2464 
. Tracheides of the secondary wood in radial section. x 180. Slide 2462. 
. Longitudinal section through “ mixed pith.” g.i., tracheides of internal xylem ; p., parenchyma; 
z., secondary tracheides. x 100. Slide 2462. 
. Transverse section of petiolar bundle, shown in fig. 11. 2.z., ends of the xylem-band, showing 
incipient antenne ; ph., phloem ; en., probable endodermis. Many of the tracheides, especially 
in the middle of the “apolar,” are immature. x 100. Slide 2464. 
Transverse section of petiolar bundle from the next section above, shown in figs. be & 13. 
s., $., sinus at each end of xylem; «.a., autennz of the xylem. X 110. Slide 2465. 
SECON) SERIES —-BOTANY, VOL. VIJ. 
