Page 
Disease of Greengage Trees caused by Dennatella 
prunastri Pers. (3 Text-figs.)—W. J. Dowson... 207 
Disease of Tomatoes, A (13 Text-figs.)—F. T. Brooks 
and S. R. Price ... ... ... ... ... 13 
Double-Staining Microtomed Sections in the Ribbon, A 
Method of [Laboratory Note] — E. de Fraine ... 123 
Ecology of Calluna vulgaris , The (Plate III and 2 Text- 
figs.)—M. Cheveley Rayner ... ... ... 59 
Evolution of the Higher Uredineae, The (2 Text-figs.)— 
W. B. Grove ... ... ... ... ... 89 
Extinct Antarctic Flora, An [Notes on Recent Literature] 
—A. C. Seward ... ... ... ... ... 188 
Flagellata and Primitive Algae, Recent Work on — 
F. Cavers 
I—Introduction ... ... ... ... 28 
II—General Characters of the Flagellata ... 30 
III—Chloromonads and Heterokontae (“Confer- 
vales ” and “Yellow-Green Algae”) (l 
Text-fig.) ... ... ... ... ... 33 
IV—Relation of Green Algae to Chlamydo- 
monads (Table A) ... ... ... 78 
V—Volvocales (3 Text-figs, and Table B) ... 80 
VI—The Chrysomonads (2 Text-figs.) ... Ill 
VII—The Cryptomonads and their Relation¬ 
ships (l Text-fig.) ... ... ... 118 
VIII—The Peridiniales (Dinoflagellata) and 
their Relationships (Table C and 3 Text- 
figs.) ... ... ... ... ... 177 
IX—Conclusion ... ... ... ... 225 
Bibliography ... ... ... ... 227 
Fossil Selaginella, A British (Plate IV)—A. C. Seward 86 
Graft Hybrids, Connecting Threads in (1 Text-fig.)— 
Margaret Hume ... ... ... ... ... 216 
Greengage Trees, On a Disease of, caused by Dennatella 
prunastri Pers. (3 Text-figs.)—W. J. Dowson 207 
Heath Associations on Hindhead Common, The (Plate V 
and 4 Text-figs.) — F. E. Fritsch and Winifred 
M. Parker ... ... ... ... ... ... 148 
Hemibasidii, The [Notes on Recent Literature] —A. W. 
Bartlett ... ... ... ... ... ... 358 
Hepatics, British [Review]—W. Watson ... ... 263 
Herbals: Their Origin and Evolution [Review]—R. H. 
C(ompton) ... ... ... ... ... ... 84 
Heterokontae (see Flagellata). 
