CONTENTS 
ro.SMO. 
FAGE 
David Thomas Gwynne-Vaughan. With Portrait i-xxiv 
Alfred Stanley Marsh xxv-xxvii 
No. CXVII, January, 1916. 
WlLLIS, J. C. — The Evolution of Species in Ceylon, with reference to the Dying Out of Species. 
With two Figures in the Text ........... 1 
Leitch, I. — Some Experiments on the Influence of Temperature on the Rate of Growth 
in Pisum sativum. With Plate I and ten Figures in the Text . . . . .25 
Laidlaw, C. G. P., and Knight, R. C. — A Description of a Recording Porometer and 
a Note on Stomatal Behaviour during Wilting. With three Figures in the Text . 47 
Knight, R. C. — On the Use of the Porometer in Stomatal Investigation. With seven 
Figures in the Text .... ......... 57 
Brenchley, Winifred E. — The Effect of the Concentration of the Nutrient Solution on the 
Growth of Barley and Wheat in W'ater Cultures. With Plate II and four Diagrams 
in the Text .............. 77 
Barratt, Kate. — T he Origin of the Endodermis in the Stem of Hippuris. With six Figures 
in the Text ........ ......91 
Davie, R. C. — The Development of the Sorus and Sporangium and the Prothallus of Pera- 
nema cyatheoides, D. Don. With Plate III and two Figures in the Text . . .101 
Stopes, Marie C. — An Early Type of the Abietineae (?) from the Cretaceous of New 
Zealand. With Plate IV and seven Figures in the Text . . . . . .111 
Holden, H. S. — Further Observations on the Wound Reactions of the Petioles of Pteris 
aquilina. With four Figures in the Text . . . . . . . . .127 
Fritsch, F. E. — The Morphology and Ecology of an Extreme Terrestrial Form of Zygnema 
(Zygogonium) ericetorum (Kuetz.), Hansg. With three Figures in the Text . . 135 
Takeda, IT. — Dysmorphococcus variabilis, gen. et sp. nov. With fifteen Figures in the 
Text . . . . . . . . . . . . . . . 1 5 1 
Takeda, H. — Scourfieldia cordiformis, a New Chlamydomonad. With five Figures in the 
Text ........ ..... 157 
Stapledon, R. G. — On the Plant Communities of Farm Land ...... 161 
Fraser, Mary T. — Parallel Tests of Seeds by Germination and by Electrical Response. 
(Preliminary Experiments.) . . . . . . . . . . .181 
NOTES. 
Small, James. — A nomalies in the Ovary of Senecio vulgaris, L. W 7 ith three Figures in the 
Text . . . . . . . . . . . . . . .191 
Doyle, Joseph. — N ote on the Structure of the Ovule of Larix leptolepis. With one Figure in 
the Text 193 
No. CXVIII, April, 1916. 
Takeda, H. — Some Points in the Morphology of the Stipules in the Stellatae, with special 
reference to Galium. With twenty-seven Figures in the Text . . . . .197 
Hill, Arthur W. — Studies in Seed Germination. The Genus Marah (Megarrhiza), Cucurbi- 
taceae. With Plate V and two Figures in the Text . . . . . . *215 
Hind, Mildred. — Studies in Permeability. III. The Absorption of Acids by Plant Tissue. 
With eleven Figures in the Text . . . . . . . . . .223 
A 2 
