PAGE 
CONTENTS. 
Blackman, V. H. — On the Fertilization, Alternation of Generations, 
and general Cytology of the Uredineae. With Plates XXI- 
XXIV 323 
Darbishire, O. V.— Observations on Mamillaria elongata. With 
Plates XXV and XXVI . . . 375 
Lawson, A. A. — The Gametophytes, Fertilization, and Embryo of 
Cryptomeria japonica. With Plates XXVI I-XXX . . . 417 
Gregory, R. P. — Spore-Formation in Leptosporangiate F erns. With 
Plate XXXI and a Figure in the Text 445 
Massee, G. — A Monograph of the genus Inocybe, Karsten. With 
Plate XXXII 459 
Boodle, L. A. — On the Occurrence of Secondary Xylem in Psilotum. 
With Plate XXXIII and seven Figures in the Text . . . 505 
NOTE. 
Scott, D. H. — On the Occurrence of Sigillariopsis in the Lower Coal- 
Measures of Britain 519 
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