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 Plormones in regulating Metabolism . . 507 
NOTE. 
Kusano, S. — Preliminary Note on Gastrodia elata and its Mycorhiza . . . . .521 
