CONTENTS. 
PACE 
Miss Ethel Sargant, F.L.S. . . . . . . . . . . . . i' 
Parr, Rosalie.— The Response of Pilobolus to Light. With four Figures in the Text . 177 
Rivett, M. F.—The Structure of the Cytoplasm in the Cells of Aliculafria scalaris, Cord. 
With Plate VI and three Figures in the Text ... . . . . 207 
Sargent, Oswald H.—Fragments of the Flower Biology of Westralian Plants . .215 
Davie, R. C.—A Comparative List of Fern Pinna-traces, with some Notes on the Leaf- 
trace in the Ferns. With five Figures in the Text . . . . . . 233 
ShARPLES, A.—The Laticiferous System of Hevea brasiliensis and its Protective Function 247 
Gates, R. RuGGLES.— A Systematic Analytical Study of certain North American Conval- 
lariaceae, considered in regard to their Origin through Discontinuous Variation . 253 
Brenchley, Winifred E.— Organic Plant Poisons. II. Phenols. With eighteen 
Figures in the Text..259 
Ishikawa, Rigakiishi , M.—Studies on the Embryo Sac and Fertilization in Oenothera. 
With Plate VII and fourteen Figures in the Text . . . . . 279 
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