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CONTENTS.—Buiackman, V. H., On the Fertilization, Alternation of Guie ra * ~ 
tions, and General Cytology of the Uredinex —Darnisuiee, O. V., Observations on 
-Mamillaria elongata.—Lawson, A. A., The Gametophytes, Fertilization, and Embryo 
Cryptomeria jubaibas — Grecory, R. P., Spore-Formation in on Ug ag ate 
‘erns.—Massex, G., A Monograph of the Genus aay ee Karsten.—Boopte, L. 
1 | the Occurrence of Secondary Xylem in Psilotum. — Scorr, D. H., Note on the 
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