79 
Trigonocarpus Shorensis, sp. nov. 
Fig. 3. Tangential section through the outer sclerotesta. The band-like aggregates of fibrous 
cells are seen overlapping n a plait-like manner (f.b.) and passing in different directions. S. 32, g. 
x 60. 
Fig. 4. Slightly oblique transverse section near base of seed ; on one side a small projection is 
seen, representing the termination of a minor rib (r 1 ). Within is the contracted nucellus (nu.) with 
secretory sacs in radial files, over which the contracted epidermis has formed ridges. S. 33, c. x 2. 
Fig. 5. A tangential section through the zone of transition between the sclerotesta (sc/.) and 
the sarcotesta (st. c.). The slightly thickened walls, the elongated form, and the sinuous course of 
the inner sarcotestal cells are here seen. S. 32, g. x 90. 
Fig. 6. An oblique section through the base of the micropyle, showing the extensive unflattened 
sarcotesta with limiting layers at and secretory sacs in outer sclerotesta (m.s.). S. 31, i. x 5. 
Fig. 7. Obliquely longitudinal section through chalazal end of the seed, showing vascular 
bundle (v.b.), chalazal papilla (c.p.), and the tapering base of seed. S. 32, e. x 2§. 
Fig. 8. Section through extreme apex of sclerotic beak. The sclerotesta is seen to be thinning 
out rapidly, and at the higher level on the right is only some three elements in width. The sides 
show a median constriction (m.c.) resulting in a six-lobed structure (m.l.). The inner flesh (if) 
shows a gradual transition from the sclerotic tissue. R. 1161, e. x 28. 
Fig. 9. Oblique section through the base of the seed, passing through all six ribs (r 1 , r 2 , r 3 , 
and r 1 , r 2 , r 3 ). At c.p. the chalazal papilla is seen perforated by the single vascular bundle (v.b.). 
R. 1161, b. x 4. 
Fig. 10. Tangential section through the periphery of the sarcotesta, showing the lacunae (lac/) 
separated in places by the superposed peg-like projections of the stellate cells (p.), and elsewhere by 
the cells proper. S. 32, k. x 90. 
PLATE V. 
Figs. 1 1-20, photomicrographs. 
Fig. 11. Vertical section through the pollen-chamber wall ( p.w .), from which the cuticle has 
become separated (cu.). The shoulder is occupied by thin-walled parenchymatous tissue (sh.). The 
oval bodies are fungal spores (sp.). S. 32, c. x 50. 
Fig. 12. Transverse section through the sarcotesta with two secretory elements, probably 
derived by branching, in close contact (m.s.). S. 31. x 60. 
Fig. 13. A portion of a transverse section to show the nucellar flange, consisting of parenchy- 
matous tissue (n.f.) and corresponding in position to a commissural rib (com.). A lenticular nucellar 
strand is seen on the left (v.b.). S. 31, e. x 30. 
Trigonocarpus Parkinsoni. 
Fig. 14. Transverse section through the chalazal bundle of Trigonocarpus Parkinsoni at the 
level at which the sarcotestal strands (v.b.) are given off. At the top one of these has branched into 
two. The central xylem mass (c. xy.) is surrounded by a discontinuous sheath of parenchyma (par.), 
exterior to which more tracheides (tr.) are seen. A single secretory element (m.s.) occupies a position 
within the xylem mass. In the space between the bundle and the sclerotesta several more secretory 
elements are seen and remains of parenchymatous tissue. S. 34, a. x 90. 
Fig. 15. A single sarcotestal bundle from near the base of Trigonocarpus Parkinsoni , showing 
the dual nature of the xylem. The centre of the strand is occupied by narrow tracheides (n.tr.) 
surrounded by a parenchyma sheath (par.), and this again is followed by a zone of short broad 
tracheides (s.tr.). S. 34, b. x 90. 
Trigonocarpus Shorensis. 
Fig. 16. Transverse section through the chalazal bundle of T. Shorensis. 1 'he parenchyma 
sheath (p.s.) around the bundle and the radially extended tracheides of the outer zone are clearly 
seen. The protoxylems are seen occupying a position just within these latter, m.s., mucilage sacs. 
S. 33,A x 100. 
Fig. 17. Transverse section through a sarcotestal bundle, showing the thick-walled protoxylem 
elements (pt.x.), the small elements of the centrifugal xylem (cfx.), and the large short tracheides 
comprising the centripetal (cp,x.). Touching the bundle on the right is a sclerotic strand of the 
limiting layers, m.s., mucilage sac. S. 31, ?. x 100. 
