XXvi REPORT — 1898. 



Page 



4. A Potato Disease. By Professor H. Makshall Ward, D.Sc, F.R.S.... 1046 



5. Penicillium as a AVood-destroying Fungus. By Professor H. Marshall 



Ward, D.Sc, F.R.S lOiS 



SATURDA Y, SEPTEMBER 10. 



1 . On a Fine Specimen of the Halonial branch of a Lepidodendron allied to 



L. fuliginosum (Will). ByD. H. ScoiT, M.A., Ph.D., F.R.S 1049 



2. On an English Botryopteris. ByD. H. Scott, M.A., Ph.D., F.R.S 1050 



3. On the Structure of Zygopteris. By D. H. Scott, M.A., Ph.D., F.R.S. 1050 



4. A Rare Fern, Matonia pectinata (R. Br.). By A. 0. Seward, F.R.S.... 1050 



5. The Prothallus of Lycopodium clavatum (L.). By William H. Lang, 

 M.B., B.Sc „ 1050 



G. Note on the Anatomy of the Stem of Species of Lycopodium. By C. E. 

 Jones 1051 



MONDAY, SEPTEMBER 12. 



1. A Discussion on the Alternation of Generations in Plants : — 



(ff) Alternation of Generations in the Archegoniatae. By William 



IL Lang, M.B.,B.Sc 1051 



{J>) On Alternation of Generations in the Thallophytes. By Professor 



Georg Klebs 1057 



(e) The Formation of the Zygospore in Polyphagus Euglenre. By 



Harold Wager 1064 



2. On the Peltation of Leaves. By Professor C. de Oandolle 1065 



3. Changes in the Sex of Willows. By L PL Bxjrkill, M.A 1065 



4. Apogeotropic Roots of Bowenia spectablilis (Hk. f.). By H. H. AV. 



Pearson, B.A 1066 



TUESDAY, SEPTEMBER 23. 



1. Preliminary Note on Changes in the Gland Cells of Drosera produced bj-^ 



Various Food Materials. ByLiLTH. Huie 1066 



2. Theoretical Calculation of an Osmotic Optimum. By Professor Dr. L. 



Erreea 1067 



•J. On the Unit to be adopted for Osmotic Measurements. By Professor 



Dr. L. Errera 1068 



4. The Knight-Darwin Law. By Francis Darwin, F.R.S 1068 



5. Structure of the Yeast-cell. By Professor Dr. L. Errera 1068 



G. Stmcture of the Yeast Plant. By Harold Wager 1069 



7. Observations on the Cytology of Achlya Americana (Humphrey) var. 



nov. By A. H. Trow 1069 



Index 1071 



