IV 
Contents. 
No. XCI, July, 1909. 
Mottier, D. M. — On the Prophases of the Heterotypic Mitosis in the Embryo-sac Mother-cell 
of Lilium. With Plate XXIII 
Kershaw, E. M. — The Structure and Development of the Ovule of Myrica Gale. With 
Plate XXIV, and two Figures in the Text 
Stephens, E. L. — The Embryo-sac and Embryo of certain Penaeaceae. With Plates XXV 
and XXVI 
Watson, D. M. S.— On Mesostrobus, a New Genus of Lycopodiaceous Cones from the Lower 
Coal Measures, with a Note on the Systematic Position of Spencerites. With Plate 
XXVII, and six Figures in the Text ......... 
Cutting, E. M. — On the Sexuality and Development of the Ascocarp in Ascophanus carneus, 
Pers. With Plate XXVIII 
Boodle, L. A., and Hiley, W. E. — On the Vascular Structure of some Species of Gleichenia. 
With Plate XXIX, and three Figures in the Text 
Hill, T. G., and de Fraine, E. — On the Seedling Structure of Gymnosperms. III. With 
Plate XXX, and four Figures in the Text 
Wager, H. — The Perception of Light in Plants. With Plates XXXI and XXXII, and three 
Figures in the Text . 
Digby, L. — Observations on ‘Chromatin Bodies’ and their Relation to the Nucleolus in 
Galtonia candicans, Decsne. With Plates XXXIII and XXXIV .... 
Fischer, C. C. E. — On the Development of the Fructification of Armillaria mucida, Schrad. 
With Plate XXXV 
Berridge, E. M. — Fertilization in Ephedra altissima. With Plate XXXVI .... 
NOTE. 
Arber, E. A. N., and Thomas, H. H. — A Note on the Structure of the Cortex of Sigillaria 
mamillaris, Brongn. 
No. XCII, October, 1909. 
Fischer, C. C. E. — The Biology of Armillaria mucida, Schrader. With Plates XXXVII 
and XXXVIII 
Fraser, H. C. I., and Brooks, W. E. St. J.— Further Studies on the Cytology of the Ascus. 
With Plates XXXIX and XL, and a Figure in the Text 
Davis, B. M. — Cytological Studies on Oenothera. I. Pollen Development of Oenothera 
grandiflora. With Plates XLI and XLII 
Acton, E. — Coccomyxa subellipsoidea, a new member of the Palmellaceae. With Plate XLIII 
Botrydina vulgaris, Br^bisson, a primitive Lichen. With Plate XLIV, and 
a Figure in the Text ............ 
Eames, A. J. — On the Occurrence of Centripetal Xylem in Equisetum. With Plate XLV . 
Osborn, T. G. B. — The Lateral Roots of Amyelon radicans, Will. , and their Mycorhiza. With 
Plates XLVI and XLVII 
Yendo, K. — On the Mucilage Glands of Undaria. With Plate XLVIII . 
Benson, M., and Welsford, E. J. — The Morphology of the Ovule and Female Flower of 
Juglans regia and of a few allied Genera. With eight Figures in the Text 
Thoday, D., and Sykes, M. G. — Preliminary Observations on the Transpiration Current in 
Submerged Water-plants 
Lewis, I. F. — The Life-History of Griffithsia Bornetiana. With Plates XLIX-LIII, and two 
Figures in the Text ............. 
NOTES. 
Campbell, D. H. — The Prothallium and Embryo of Danaea ....... 
Kershaw, M. — Further Observations on the Structure of the Ovules of Myricaceae and Allied 
Groups . 
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