TRANSACTIONS OK THE SECTIONS. XXV 



Section K.— BOTANY. 



THURSDAY, AUGUST 31. 



Page 

 Address by Professor P. E. Weiss, D.Sc, President of the Section 550 



1. The Life-History of a Shingle Bank. By Professor F. W. Oliver, F.R.S. 562 



2. The Swiss National Park and its Flora. By Professor C. Schroter . . . 5(53 



3. Phytogeography as an Experimental Science. By Professor Jean 



Massart 564 



4. A Fifteen- Year Study of Advancing Sand Dunes. By Professor Henry 



C. Cowles 565 



5. On the Brown Seaweeds of a Salt Marsh. By Miss Sarah M. Baker. . 565 



6. The Guises of the Formation of Hairs and Palisade Cells in certain Plants. 



By Professor R. H. Yapp, M.A 565 



7. *The Forest Stages represented in the Peat underlying the Moorlands of 



Britain. By F. J. Lewis, D.Sc, F.L.S 566 



8. Types of Vegetation in the District round Macclesfield. By Miss Lilian 



Baker, M.Sc, and B. W. Baker, B.A 566 



FRIDAY, SEPTEMBER 1. 



1. The Structure and Development of the Ovule of Buwenia speclabilis. 



By Miss E. M. Kershaw, M.Sc 567 



2. The Structure of a New Type of Synangium from the Calciferous Sand- 



stone Beds of Pettycut, Fife, and its Bearing on the Origin of the 

 Seed. By Miss M. J. Benson, D.Sc 568 



3. A Paheozoic Fern and its Relationships (Zygopieris Graiji, Williamson). 



By Dr. D. H. Scott, F.R.S., Pies. L.S 568 



4. Recent Researches on the Jurassic Plants of Yorkshire. By H. Hamshaw 



Thomas, M.A 569 



5. A Petrified Jurassic Plant from Scotland. By Professor A. C. Seward, 



F.R.S 570 



6. A Contribution to our Knowledge of the Formation of Calcareous Nodules 



containing Plant Remains. By Miss T. Lockhart, B.Sc 570 



7. Nuclear Osmosis as a Factor in Mitosis. By A. Anstruther Lawson, 



D.Sc, F.R.S.E 570 



8. The Longitudinal Fission of the Meiotic Chromosomes in Vicia Fuba. 



By Miss H. C. 1. Eraser, D.Sc 571 



'J. The Lite-Cycle and Affinities of the Plasmodiophomceoe. By T. G. B. 



Osborn, M.Sc 572 



