OF CEYLON AND INDIA. 
461 
from below (Weddell’s D. pterophylla, spirit material collected by 
Hooker), nat. size, to show the stout foot with ascending thallus. 15 Open 
flower, with spathe and bracts, X 2. 
Plate XXI., DicræaWalliohii Khasiana, x 4/7.— On the left are two 
stones from below water, Cherra, Dec., 1901, showing the closely appressed 
broad alga-like thallns with marginal buds ; on the right three stones from 
above water at same place, showing the fimbriate fruiting thalli, the inter- 
mediate tissues having fallen away. The various single plants occupying 
the centre of the plate show all stages in the process ; all are from Cherra, 
The three small specimens in the left-hand upper corner are the originals of 
Weddell’s D, pterophylla ; the larger lobed specimen below them opposite 
the space between the rocks is an original specimen of G-riffith’s D. 
Wallichii ; the rest were collected by myself in Dec., 1901. 
Plate XXII., Dicræa stylosa. — 1 Apex of form laoiniata^ x 5, with root- 
cap (r.c.), secondary shoots (.?.6'.),and vascular bundles 2 Seedling 
of form fuGoides, X 5; liyp., the hypocotyl, with cotyledons (^cot.'), young 
thallus and secondary shoots (.?.^.). 3 A young plant ofßicoides, nat. 
size, showing general habit of the form that is only attached by a basal 
foot, 4 Vertical section of foot of same, X 2. 5 Longitudinal section apex 
of thallus of fucoides, diagrammatic, showing root-cap (r.c.) and vascular 
strand (^’.&.), X 80. 6 The same apex, from above, with secondary shoots 
[s.s.'). 7 Transverse section of thallus, x 10, to show general form when 
young, and central vascular strand. 8 Transverse section of same thallus, 
X 150, showing epidermis (ep.'), parenchymatous cortex {p.c.'), and 
vascular strand with its two groups. 9 An older thallus, X 80, to the 
right of the vascular strand (v.h.'), to show the way in which the cortex 
grows in thickness and the thallus curves upwards at the side. 
.. Plate XXIII. is omitted, see above. 
Plate XXIV., Dicræa stylosa. — 1 Floral shoots of var./wc'ci(^6?À*, x 4, 
one with open, one with closed, spathe (^S 2 )a.'). 2 Open fiower of var. 
Bourdillonii, with vascular bundle leading to it (t'.5.), X 2^. 3 Portion of 
plant of var. Uanarensis^ X 3, showing the acuminate form of the ripe 
bracts, the irregular distribution of the fioriferous shoots, and the thick- 
ening of the tissues leading to them (it?.). Dicræa minor. — 4 Plant or 
part of plant, from spirit material collected by Hooker, X IJ. 5 A secondary 
shoot ready to flower, X 2L 6 A shoot with ripe fruit, from G-ritfith’s dry 
material, X 3. G-riffithella Hookeriana. — 7 Apex of a thallus (C. A. 
Barber, 2,149), X 4, showing development of leafy and floral shoots. 8 
Floral shoot of same form, X 6, showing bracts with leafy tips still 
persistent. The flower is ready for fertilization ; it has become twisted 
round in emerging from the spathe std.^ the staminode or perianth 
segment on one side of fertile stamens. 9 Transverse section of ripening 
ovary, x 20, showing absence of vascular bundles in the wall ; pl.^ the 
placenta, with its ovules (ot'.) ; /., the thick-walled cells forming inner 
layer of pericarp. 10 Part of pericarp enlarged, X 320, showing dehiscence 
layer {delid)^ inner epidermis (7.e.), sclerenchyma {scl.')^ and thick-walled 
cells (/.). 
Plate XXV., Griflithella Hookeriana Willisiana, x 3/7 (C. A. 
Barber. Nos. 2,515, 2.519). — 1 (large left-hand rock. 2.519) A single 
