Index of Subjects 
v 
Red Campion {Lychnis dioica L.), An Apocarpic Plant of the, see 
Apocarpic Plant 
Reversible and Irreversible Changes in Cell Permeability, see 
Permeability 
Seasonal Changes in the Organisation in Leaf Cells of Picea 
canadensis (Mill.) B.S.P., On the Phenomena attending—Francis 
J. Lewis and Gwynethe M. Tuttle . 
Spitzbergen, A New Alga from, see Tetraedroides spetsbergensis 
Stem Elongation, An Apparatus for the Measurement of (Labora¬ 
tory Note)—C. Hunter and E. M. Rich 
Taxonomy and Variation of the Genus Microcystis in Ceylon, The 
(i Plate)—W. B. Crow. 
Tetraedroides spetsbergensis gen. et sp. nov., a New Alga from 
Spitzbergen (Results of the Oxford University Expedition to 
Spitzbergen, No. 28) (1 Plate)—B. Millard Griffiths . 
Theories of Cell Permeability, see Permeability 
Variation as an Organic Function—C. W. Soal . 
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