CONTENTS. 
PAGE ■ 
Saunders, Edith R. — The Leaf-skin Theory of the Stem : A Consideration of certain 
Anatomico-physiological Relations in the Spermophyte Shoot. With thirty-four 
Figures in the Text 135 
Redfern, Gladys M. — On the Absorption of Ions by the Roots of Living Plants. 
I. The Absorption of the Ions of Calcium Chloride by Pea and Maize . . . 167 
I KENO, S.— On Hybridization of some Species of Salix. II 175 
Ridler, W. F. F. — The Fungus present in Pellia epiphylla, (L.) Corda. With eight 
Figures in the Text 193 
Bews, J. W. — The South-east African Flora : Its Origin, Migrations, and Evolutionary 
Tendencies 209 
Priestley, J. H., and Evershed, A. F. C. H.— Growth Studies. I. A Quantitative 
Study of the Growth of Roots. With five Tables and six Figures in the Text . . 225 
Priestley, J. H*, and Pearsall, W. H.— Growth Studies. II. An Interpretation of 
some Growth-curves. With four Figures in the Text . . . . . . 239 
Arber, Agnes. — Studies on Intrafascicular Cambium in Monocotyledons. V. With 
eight Figures in the Text \. . . . 251 ' 
Brown, William. — On the Germination and Growth of Fungi at various Temperatures 
and in various Concentrations of Oxygen and of Carbon Dioxide. With four Figures 
in the Text . *..... 257 
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