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Notes on the Anatomy of Stangeria paradoxa (11 Text-figs.) 
—A. S. Marsh ... ... ... ... ... 18 
Notes on Bcitrachospennum (10 Text-figs.)—S. Reginald 
1 ^nee ... ... ... ... ... ... ... 270 
Observations on Hirneola Auyicula-judce Berk. (“Jew’s 
Ear”) (9 Text-figs.)—M. J. Le Goc ... ... 122 
Pateontologie Wg^tale, by F. Pelourde [Review]—H. H. 
Thomas ... ... ... ... ... ... 250 
Phoenix dactylifera L., Note on the “ Fruiting Male ” of 
(5 Text-figs.)—H. Martin Leake ... ... ... 69 
Photosynthesis, Pioneer Investigators of—R. J. Harvey 
Gibson ... ... ... ... ... ... 191 
Physiology of the Purple Sulphur Bacteria, A Contribution 
to the Physiology of the—Macgregor Skene ... 1 
Phytogeographic Excursion (see International). 
Pioneer Investigators of Photosynthesis—R. J. Harvey 
Gibson ... ... ... ... ... ... 191 
Plant Physiology (see Measurement of Electrical 
Conductivity). 
Porometer and Potometer, A Self-Recording (7 Text-figs.) 
—W. Neilson Jones ... . 353 
Potometer (see Porometer). 
Pseudocycas (see Cycadites). 
Pteridosperm Anatomy and its Relation to that of the 
Cycads (20 Text-figs.)—N. Bancroft ... ... 41 
Purple Sulphur Bacteria, A Contribution to the Physiology 
of the—Macgregor Skene ... . 1 
Recent Literature, Notes on :— 
I—A New Fern-like Stem, described by Count 
Solms-Laubach—I. M. P. Browne... ... 93 
II—Chondriosomes (Mitochondria) and their 
Significance—F. Cavers .96, 170 
Relation between Cycadites and Pseudocycas , On the 
(Plate III and 1 Text-fig.)—Ruth Holden ... 334 
Review of Literature Concerning the Evolution of Mono¬ 
cotyledons—N. Bancroft ... ... ... ... 285 
