CONTENTS. 
PAGE 
Mottier, David M. — The Development of the Heterotypic Chromo- 
somes in Pollen Mother-cells. With Plates XXVII and 
XXVIII 309 
Fraser, H. C. I.— On the Sexuality and Development of the Ascocarp 
in Lachnea stercorea, Pers. With Plates XXIX and XXX . 349 
Clark, A. M. — Secondary Thickening in Kendrickia Walkeri, Hook. f. 
With Plate XXXI . . 361 
Hickling, George. — The Anatomy of Palaeostachya vera. With 
Plates XXXII and XXXIII, and four Figures in the Text . 369 
Bayliss, Jessie S. — On the Galvanotropism of Roots. With four 
Figures in the Text and two Curves 387 
Priestly, J. H., and Irving, Annie A.— The Structure of the 
Chloroplast considered in Relation to its Function. With two 
Figures in the Text . 407 
Ridley, H. N.— Branching in Palms. With Plates XXXIV- 
XXXIX 415 
Fritsch, F. E., and Rich, Florence. — Studies on the Occurrence 
and Reproduction of British Freshwater Algae in Nature. 
I. Preliminary Observations on Spirogyra. With eleven 
Figures in the Text 423 
NOTE. 
Scott, Daisy G.— On the Distribution of Chlorophyll in the Young 
Shoots of Woody Plants 437 
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