CONTENTS. 
Bower, F. O. — Studies in the Phylogeny of the Filicales. VI. Ferns showing the 
‘ Acrostichoid ’ Condition, with special reference to Dipterid Derivatives. With 
Plates I and II and fifteen Figures in the Text 
Arber, Agnes.- — On the Occurrence of Intrafascicular Cambium in Monocotyledons. 
With three Figures in the Text 
Stiles, Walter, and Jorgensen, Ingvar— Studies in Permeability. IV. The Action 
of Various Organic Substances on the Permeability of the Plant Cell, and its Bearing 
on Czapek’s Theory of the Plasma Membrane. With fifteen Figures in the Text 
West, Cyril.— On Stigeosporium Marattiacearum and the Mycorrhiza of the Marat- 
tiaceae. With Plate III and nine Figures in the Text 
Yasui, Kono. — A Fossil Wood of Sequoia from the Tertiary of Japan. With Plate IV . 
Bristol, B. Muriel. — On the Life-history and Cytology of Chlorochytrium grande, sp. 
nov. With Plates V and VI and two Figures in the Text 
Brierley, William B. — Spore Germination in Onygena equina, Willd. . 
Curtis, K. M. — The Anatomy of the Six Epiphytic Species of the New Zealand Orchi- 
daceae. With Plates VI I-XII 
Blackburn, Kathleen B.— On the Vascular Anatomy of the Young Epicotyl in some 
Ranalean Forms. With Plate XIII and nineteen Figures in the Text 
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