PAGE 
CONTENTS. 
Lawson, A. A.— The Gametophytes, Archegonia, Fertilization, and 
Embryo of- Sequoia sempervivens. With Plates I-IV . . i 
Wager, H. — The Nucleolus and Nuclear Division in the Root-apex 
of Phaseolus. With Plate V 29 
Worsdell, W. C.— The Structure and Morphology of the ‘Ovule.’ 
An Historical 'Sketch. With twenty-seven Figures in the Text 57 
Cavers, F. — On the Structure and Biology of Fegatella conica. 
With Plates VI and VII and five Figures in the Text . . 87 
Potter, M. C. — On the Occurrence of Cellulose in the Xylem of 
Woody Stems. With Plate VIII ...... 121 
Williams, J. Lloyd. — Studies in the Dictyotaceae. I. The Cytology 
of the Tetrasporangium and the Germinating Tetraspore. With 
Plates IX and X 1 4 1 
Benson, Miss M. — Telangium Scotti, a new Species of Telangium 
(Calymmatotheca) showing Structure. With Plate XI and 
a Figure in the Text . . . 161 
NOTES. 
Hemsley, W. Botting.— -On the Genus Corynocarpus, Forst. 
Supplementary Note . . . 179 
WEISS, F. E. — The Vascular Supply of Stigmarian Rootlets. With 
a Figure in the Text . .180 
Ewart, A. J.— Root-pressure in Trees 181 
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