Index . 
Figures, ii. 
12 . 
13. 
2 . 
3- 
4* 
5- 
6 . 
7? 8- 
9- 
10. 
1 r. 
12. 
13. 
M- 
15. 
16. 
*7- 
18. 
19, 20. 
2. 
3- 
2. 
3 
4- 
5- 
6 . 
7- 
8 . 
9- 
10. 
1 1. 
1. 
1. 
2. 
3- 
4- 
5* 
6 . 
1-3- 
I_ 3‘ 
Hypothetical restoration of Gnetopsis elliptica (Oliver and Salis- 
bury) 
‘ Pollen-chambers’ of Lagenoscomales (Oliver and Salisbury) . 
Transverse restorations of apices of Physostoma and the two species 
of Conostoma (Oliver and Salisbury) 
Castanea sativa (Lee) 
Castanea sativa (Lee) 
Castanea sativa (Lee) ......... 
Kibes sanguineum (Lee) 
Ribes sanguineum (Lee) ......... 
Ti'ia europaea (Lee) ......... 
Tilia europaea (Lee) ......... 
Betula verrucosa (Lee) . 
Salix Caprea (Lee) 
Salix Caprea (Lee) .......... 
Populus balsamifera (Lee) ........ 
Populus balsamifera (Lee) 
Gleditschia triacanthos (Lee) ........ 
Rhus typhina (Lee) . . . . . . . . 
Cornus sanguinea (Lee) ......... 
Cornus sanguinea (Lee) . . . . ' f . . . . 
Celastrus articulatus (Lee) 
Catalpa Kaempferi (Lee) ........ 
Graphs showing relative absorption of mineral nutriments in parts 
per 100 by healthy and diseased lemons (O. Butler) 
Cross-section through edges of an almond-shaped area (gummosis) 
(O. Butler) 
Cross-section through sickle of pathognomonic tissue (O. Butler) . 
Base of leaf-trace of Thamnopteris (Sinnott) . . . . 
Base of leaf-trace of Danaea (Sinnott) 
Base of leaf-trace of Gleichenia Speluncae (Sinnott) 
Base of leaf-trace of Gleichenia circinata v. macrophylla (Sinnott) 
Leaf-trace and petiolar bundle of the Loxsoma or Dennstaedtia type 
(Sinnott) 
Base of leaf-trace of Plagiogyria (Sinnott) 
Base of a leaf-trace of the Onoclea type (Sinnott) 
Petiolar bundle of the Onoclea type (Sinnott) .... 
Base of leaf-trace of Cyathea Macarthuri (Sinnott) 
Petiolar bundle of Clepsydropsis (Sinnott) 
Petiolar bundle of Asterochlaena (Sinnott) 
Schizaeopsis expansa (Berry) 
Compound rays in the lower Dicotyledons (Bailey) 
Hottonia palnstris (Prankerd) 
Diagrams 1-6. Types of Stele found in Plottonia (Prankerd) 
Part of a transverse section across the subterranean part of the 
rhizome (Prankerd) 
Part of a transverse section across the aquatic stem near the base of 
the inflorescence (Prankerd) 
Longitudinal section of stem near the base of the inflorescence 
(Prankerd) 
Transverse section across the base of the inflorescence of Hottonia 
inflata (Prankerd) 
Xylem, phloem, and protoxylem (Prankerd) .... 
Arrangement for using Blades of Safety Razors in the Microtome 
(Bentley) 
Sections of spermatid (Wilson) 
vii 
PAGE 
34 
39 
42 
54 
55 
56 
58 
59 
60 
62 
63 
65 
67 
69 
70 
79 
87 
93 
94 
96 
99 
121 
144 
M7 
170 
170 
170 
173 
T 73 
177 
177 
177 
177 
183 
183 
196 
234 
254 
256 
257 
258 
260 
261 
263 
274 
44i 
