Index . 
Vll 
Figures. 
PAGE 
7. Sporangia of Leptochilus tricuspis (Bower) 13 
8. Portions of fertile pinna of Neocheiropteris, showing the venation and 
the outlines of the large sori (Bower) . . . . . • 1 7 
9. Series of transverse sections through the rhizome of Leptochilus 
nicotianaefolius (Bower) . . . . . . . .21 
10. Sections through the rhizome of Leptochilus cuspidatus (Bower) . 23 
11. Transverse section of rhizome of Dryostachyum (Photinopteris) dry- 
narioides (Bower) 24 
12. a , venation of part of leaf of Syngramme borneensis, showing marginal 
fusions ; b , basal region of a similar leaf showing fusions often 
omitted ; c, venation of leaf of Syngramme (Gymnogramme) 
Wallichii, Hk. ; d, ditto, but showing more complex reticulation 
(Bower) 26 
13. Elaphoglossum latifolium (Bower). 27 
14. Venation of margin of leaf of Elaphoglossum latifolium (Bower) . 28 
15. ' Elaphoglossum latifolium (Bower) 28 
1-3. Transverse sections of vascular bundles from inflorescence axes of 
Eremurus himalaicus, Baker (Arber) ...... 43 
1. The exosmosis of electrolytes from various quantities of potato in mole- 
cular solutions of pyridine (Stiles and Jorgensen) . . . 52 
2. Exosmosis of electrolytes from beetroot in solutions of isoamyl alcohol 
of various concentrations (Stiles and Jorgensen) ... 54 
3. Ditto from leaves of Oxalis acetosella (Stiles and Jorgensen) . 56 
4, 5. Ditto from potato immersed in solutions of methyl alcohol of various 
concentrations (Stiles and Jorgensen) . . . . *59 
6. Ditto in solutions of ethyl alcohol of ditto (Stiles and Jorgensen) . 60 
7. Ditto in solutions of normal propyl alcohol of ditto (Stiles and 
Jorgensen) 62 
8. Ditto in solutions of isobutyl alcohol of ditto (Stiles and Jorgensen) 62 
9. Ditto in solutions of isoamvl alcohol of ditto (Stiles and Jor- 
gensen) ... 63 
10. Ditto in solutions of a secondary octyl alcohol of ditto (Stiles and 
Jorgensen) 63 
11. Ditto in solutions of chloral hydrate of ditto (Stiles and Jor- 
gensen) .64 
12. Ditto in solutions of acetone of ditto (Stiles and Jorgensen) . . 65 
13. Ditto in solutions of aniline of ditto (Stiles and Jorgensen) . . 66 
14. Ditto in solutions of pyridine of ditto (Stiles and Jorgensen) . 66 
1 5. Curves obtained from theoretical considerations of the relation between 
time and quantity of exosmosis from plant tissue (Stiles and 
Jorgensen) . 74 
1. Part of a longitudinal section of a root of Archangiopteris Henryi, 
Chr. et Gies., showing infecting hypha of Stigeosporium Marattia- 
cearum (West) 79 
2. Mycelium of Stigeosporium Marattiacearum (West) ... 80 
3. Cortical cells undergoing further division as a result of the presence of 
the endophyte (West) 81 
4. Disorganizing ‘arbuscules’ of Stigeosporium Marattiacearum, as seen 
in (a) a transverse section of a root and in (b) a longitudinal section 
of a root of Marattia Cooperi, Mre. (West) 82 
5. Diagram showing position of the fungus within the tissues of the host- 
root (West) .82 
6. Vesicles of Stigeosporium Marattiacearum in cortical cells of ( a , b) 
roots of Angiopteris evecta, Hoffm., and of (c, d) roots of Archangio- 
pteris Henryi, Chr. et Gies. (West) 84 
