CONTENTS. 
PAGE 
Buller, A. H. R.—The Function and Fate of the Cystidia of Coprinus 
atramentarius, together with some General Remarks on Coprinus 
Fruit-bodies. With Plates L and LI. . 613 
Davis, B. M.— Cytological Studies on Oenothera. II. The Reduction 
Divisions of Oenothera biennis. With Plates LI I and LI 11 . . 631 
Balls, W. L.—The Mechanism of Nuclear Division. With Plate LIV 
and a Figure in the Text.653 
Benson, Margaret. —Root Parasitism in Exocarpus (with comparative 
Notes on the Haustoria of Thesium). With Plate LV and four 
Figufes in the Text .......... 667 
Stopes, Marie C.—Further Observations on the Fossil Flower, Creto- 
varium. With Plates LVI and LVII.670 
Kershaw, E. M.—A Fossil Solenostelic Fern. With Plate LVI 11 and 
a Figure in the Text .......... 683 
Miller, E. C.—A Physiological Study of the Germination of Helianthus 
annuus. With twenty-four Figures in the Text.693 
Digby, L. —The Somatic, Premeiotic, and Meiotic Nuclear Divisions of 
Galtonia candicans. With Plates LIX-LXIII ..... 727 
Pearson, H. H. W.—On the Embryo of Welwitschia. With Plate LXIV 
and two Figures in the Text.759 
Jeffrey, E. C.—On the Affinities of the Genus Yezonia. With Plate LXV 767 
Kemp, H. P.—On the Question of the Occurrence of ‘ Heterotypical 
Reduction’ in Somatic Cells. With Plates LXVI and LXVII . . 775 
Irving, A. A.—The Beginning of Photosynthesis and the Development of 
Chlorophyll. With ten Figures in the Text.805 
NOTES. 
Scott, D. H.—Sporangia attributed to Botryopteris antiqua, Kidston. 
With a Figure in the Text.- 819 
Gordon, W. T. —Note on the Prothallus of Lepidodendron Veltheim- 
ianum. With two Figures in the Text.821 
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