CONTENTS, 
PAGE 
WOOLERY, Ruth. -Meiotic Divisions in the Microspore Mother-cells of Smilacina race- 
mosa (L.), Desf. With Plate XXII and one Figure m the Text.471 
Brierley, William B. — The ‘ Endoconidia’ of Thielavia basicola, Zopf. With Plate 
•XXIII and one Figure in the Text . . ..' 483 
Bower, F. O. — Studies in the Phylogeny of the Filicales. V. Cheiropleuria bicuspis (BL), 
Presl, and certain other related Ferns. With Plates XXIV and XXV and nineteen 
Figures in the Text.495 
Bancroft, N. — A Contribution to our Knowledge of Rachiopteris - cylindrica, Will. 
With Plates XXVI and XXVII and seventeen Figures in the Text .... 531 
Worsdell, W. C.—The Origin and Meaning of Medullary (Intraxylary) Phloem in the 
Stems of Dicotyledons. I. Cucurbitaceae. With ten Figures in the Text . . . 567 
Affourtit, M. F. A., and La Riviere, H. C. C.—On the Ribbingof the Seeclsof Ginkgo. 
With one Figure in the Text. . ... , . . . . 591 
Beer, Rudolf, and Arber, Agnes. —On the Occurrence of Binucleateand Multinucleate 
Cells in Growing Tissues.597 
Prankerd, T. L.—Notes on the Occurrence of Multinucleate Cells. With eight Figures 
in the Text. 599 
Bottomley, W. B.—The Root-nodules of Ceanothus americanus. With Plate XXVIII. 605 
Stiles, Walter, and Jorgensen, I ngvar.— Studies in Permeability. II. The Effect 
of Temperature on the Permeability of Plant Cells to the Hydrogen Ion. With four 
Diagrams in the Text . .. . 611 
Spratt, Ethel Rose. —The Root-Nodules of the Cycadaceae. With Plate XXIX . 619 
Hunter, C.—The Aerating System of Vicia Faba. With six Figures in the-Text . . 627 
JESSON, Enid M.-—On the Hairs of the Tomentum and Ovary in Rhododendron Falconeri, 
Hook, f., and Rhododendron Hodgsoni, Hook. f. With one Figure in the Text . 635 
Gwynne-Vaughan, H. C. I.—Obituary Notice of Ernest Lee (1886-1915) . . . 639 
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