4 H Maslen . — The Structure of Mesoxylon Sutcliffii (Scott). 
contents at outer limit of phloem of bundles ; b., delicate conjunctive tissue ; s., sheath of cells with 
contents surrounding the bundles : s.x., secondary xylem of stele ; p., phloem of stele ; pe ., pericycle ; 
i.c., cells of inner cortex. Slide No. 2615 (S). Magnification about 20 diameters. 
Fig. 9. Transverse section, showing a leaf-trace in the inner part of the cortex. Each of the 
original bundles has divided into three, l.t ., leaf-trace bundles ; s., sheath surrounding bundles ; 
s.x., secondary xylem of stele; i.c., cells of inner cortex; periderms; a.b.s., axillary bud- 
stele just escaping from the secondary xylem of the stele. Slide No. 2625 (S). Magnification about 
10 diameters. 
Fig. 10. Transverse section, showing a bud-stele in the cortex with its subtending leaf-base and 
a row of six leaf-trace bundles passing into it. a.b.s., axillary bud-stele; l.t., l.t., two of the 
leaf-trace bundles ; s.x., outer part of secondary xylem of stem ; l.b., leaf-base ; d., Dictyoxylon 
bands; p' periderm. Slide No. 2653 (S). Magnification 9 diameters. 
Fig. 11. The bud-stele shown in Fig. 10 more highly magnified, p., pith; x., xylem of 
bud-stele; m.r., medullary rays. Slide No. 2653 (S). Magnification about 140 diameters. 
Fig. 12. Transverse section, showing twin bud-steles in the cortex, b., bud-steles; l.t., leaf- 
trace bundles; s.x., secondary xylem. Slide No. 2657 (S). Magnification about 34 diameters. 
Fig. 13. Longitudinal section of the outer part of the stem, showing part of a leaf- base with 
the bud-stele in its axil, &c. a.b.s., bud-stele ; I'.t'., leaf-trace bundle ; s., sheath enclosing leaf-trace 
bundles; s.x., secondary xylem of stem; p., phloem of stem; pe., pericycle; c., cortex; l.b., leaf- 
base; a., position of abscission layer at base of petiole. Slide No. 2667 (S). Magnification about 
8 diameters. 
PLATE XXXV. 
Fig. 14. Longitudinal section of one of the leaf-trace bundles also shown on PI. XXXIII, Fig. 6, 
showing tracheides and medullary rays, t., tracheides; m.r., medullary rays. Slide No. 2667 (S). 
Magnification 370 diameters. 
Fig. 15. Part of one of the tracheides of the secondary xylem in radial section. Slide No. 2671 (S). 
Magnification about 400 diameters. 
Fig. 16. Tangential section of the secondary xylem, showing the tracheides and narrow 
medullary rays, t ., tracheides ; m.r., medullary rays. Slide No. 2665 (S). Magnification about 
400 diameters. 
Fig. 17. Transverse section of the phloem, pericycle, &c. s.x., outer part of secondary xylem 
consisting of tracheides and narrow medullary rays ; c., cambium cells; p., phloem consisting of 
thin-walled elements (? sieve tubes), and phloem parenchyma, a ; square cells with very dark 
contents, b ; cells with paler contents, c; and narrow medullary rays, m.r. ; d ., cells with dark contents 
at outer limit of phloem ; pe., pericycle ; i.c., cells of inner cortex. Slide No. 2633 (S). Magnification 
about 75 diameters. 
Fig. 18. Transverse section of petiole, showing a row of ten bundles each with centrifugal and 
centripetal xylem. i.x., inner xylem of bundle ; o.x ., outer xylem of bundle ; 0., outer (lower) side 
of petiole. Slide No. 2631 (S). Magnification about 12 diameters. 
Fig. 19. Transverse section of one of the bundles shown in Fig. 18 more highly magnified. 
Only the xylem is preserved, s.x., outer xylem elements in radial rows ; px ., protoxylem ; p’.x'., 
centrifugally developed primary xylem elements ; p" .x" ., centripetally developed primary xylem 
elements; p disorganized phloem. Slide No. 2631 (S). Magnification about 230 diameters. 
PLATE XXXVI. 
Fig. 20. Transverse section ol axillary bud. p., pith; b., bundles; m.r., medullary rays; 
,t., l.t., &c., leaf-traces; pe., pericycle; c., cortex; s.s., &c., scales of bud. Slide No. 2620 (S). 
Magnification 40 diameters. 
Fig. 21. Transverse section of one of the leaves of an axillary bud. e., epidermis; h., hypo- 
dermal layer ; m., mesophyll ; b., b., bundles. Slide No. 2632 (S). Magnification 80 diameters. 
