; TO.SHT- 
, /Hb I 
CONTENTS. 
No. LXXXV, January, 1908. 
PAGE 
Davis, Bradley Moore. — S pore Formation in Derbesia. With Plates I and II . . . 1 
Saxelby, E. M. — The Origin of the Roots in Lycopodium Selago. With Plate III . . 21 
Fraser, H. C. I. — Contributions to the Cytology of Humaria rutilans, Fries. With Plates 
IV and V 35 
Arber, E. A. Newell. — O n a new Pteridosperm possessing the Sphenopteris type of Foliage. 
With Plate VI .57 
Sykes, M. G. — The Anatomy and Morphology of Tmesipteris. With Plates VII and VIII 
and thirteen Figures in the Text . 63 
Campbell, D. H. — Studies on some Javanese Anthocerotaceae. II. With Plates IX and X 
and two Figures in the Text . . 91 
Vines, S. H. — The Proteases of Plants. V 103 
NOTES. 
Stapf, Otto. — R ediscovery of Statice arborea and Discovery of a new, allied Species . .115 
Petch, T. — A Preliminary Note on Sclerocystis coremioides, B. et Br 116 
Gallagher, W. J. — The Cytology of Rhoeo discolor . 07 
Gibson, R. J. Harvey. — A Photoelectric theory of Photosynthesis 117 
No. LXXXVI, April, 1908. 
Sargant, Ethel.— T he Reconstruction of a Race of Primitive Angiosperms. With twenty- 
one Figures in the Text . . . . . . . . . . .121 
Gibbs, L. S. — Bio-histological Notes on some new Rhodesian species of PTiirena, Hesperantha, 
and Justicia. With Plates XI and XII and ten Figures in the Text . . . . 187 
Jeffrey, Edward C. — On the Structure of the Leaf in Cretaceous Pines. With Plates XIII 
and XIV 207 
Weiss, F. E. — A Stigmaria with Centripetal Wood. With Plate XV 221 
Boodle, L. A. — On the Production of Dwarf Male Prothalli in Sporangia of Todea. With 
Plate XVI 231 
Hill, Arthur W. — The Histology of the Sieve-Tubes of Angiosperms. With Plates XVII 
and XVIII and thirteen Figures in the Text *245 
Sykes, M. G. — Anatomy and Histology of Macrocystis pyrifera and Laminaria saccharina. 
With Plates XIX-XXI 291 
NOTES. 
Bower, F. O.— Note on Ophioglossum simplex, Ridley 327 
Wilson, M. — Preliminary Note on Nuclear Division in Mnium hornum .... 328 
Stephens, E. L. — A Preliminary Note on the Embryo-Sac of certain Penaeaceae . . . 329 
Campbell, Douglas H. — The Embryo-Sac of Pandanus. Preliminary Note . . , 330 
Supplementary Note to ‘Studies on some Javanese Anthocerotaceae’ 330 
