IV 
Contents. 
PAGE 
Spratt, E. R. — Some Observations on the Life-history of Anabaena Cycadeae. With 
Plate XXXII 369 
Maslen, A. J. — The Structure of Mesoxylon Sutcliffii (Scott). With Plates XXXIII- 
XXXVI 381 
Wilson, M. — Spermatogenesis in the Bryophyta. With Plates XXXVII and XXXVIII and 
three Figures in the Text . . . . . . . . . . .415 
Scott, R. — On Traquairia. With Plates XXXIX and XL and four Figures in the Text . . 459 
Yasui, K. — On the Life-history of Salvinia natans. With Plates XLI-XLIII and one Figure 
in the Text 469 
Delf, E. M. — Transpiration and Behaviour of Stomata in Halophytes. With thirteen 
Figures in the Text 485 
Armstrong, H. E. and E. F. — The Function of Hormones in regulating Metabolism . . 507 
NOTE. 
Kusano, S. — Preliminary Note on Gastrodia elata and its Mycorhiza 521 
No. XCIX, July, 1911. 
Gwynne-Vaughan, D. T.-— Some Remarks on the Anatomy of the Osmundaceae. With 
Plate XLIV and five Diagrams in the Text . . . . . . . . 525 
Bower, F. O. — On the Primary Xylem, and the Origin of Medullation in the Ophioglossaceae. 
With Plates XLV and XLVI 537 
Bower, F. O. — On Medullation in the Pteridophyta. With Plate XL VII . . . . 555 
Prain, D. — A Review of the Genera Erythrococca and Micrococca 575 
Miyake, Kiichi, and Yasui, Kono. — O n the Gametophytes and Embryo of Pseudolarix. 
With Plate XLVIII 639 
Faull, J. H. — The Cytology of the Laboulbeniales 649 
Thoday (Sykes), M. G. — On the Histological Relations between Cuscuta and its Host. 
With Plates XLIX-LI 655 
Beer, R. — Notes on the Development of the Carpophore of some Agaricaceae. With Plate 
LII " 683 
Yendo, K. — The Development of Costaria, Undaria, and Laminaria. With Plates LIII-LV 691 
Henslow, G. — The Origin of Monocotyledons from Dicotyledons, through Self- adaptation 
to a Moist or Aquatic Habit 717 
Bancroft, N. — On the Xylem Elements of the Pteridophyta. With Plate LVI and three 
Figures in the Text ............ 745 
de Bruyn, H. — The Ontogenetic Development of the Stele in Two Species of Dipteris. 
With Plates LVII and LVIII 761 
Campbell, D. H. — The Embryo-sac of Pandanus. With Plates LIX and LX and two 
Figures in the Text 773 
Schwartz, E. J.- — The Life-history and Cytology of Sorosphaera Graminis. With Plate 
LX I 791 
Stoward, F. — -A Research into the Amyloclastic Secretory Capacities of the Embryo and 
Aleurone Layer of Hordeum with Special Reference to the Question of the Vitality 
and Auto-depletion of the Endosperm. Part I 799 
NOTE. 
Petch, T. — Note on the Biology of the Genus Septobasidium 843 
No. C, October, 1911. 
Fraser, H. C. I., and Snell, J. — The Vegetative Divisions in Vicia Faba. With Plates 
LXII and LXIII 845 
Wilson, M. — Plant Distribution in the Woods of North-East Kent. Part I. With Plates 
LXIV-LXVI and four Figures in the Text . 857 
