CONTENTS. XXV 



Page 



3. On a Foui-tli Type of Transition from Stem to Root-structure occurring 



in certain Monocotyledonous Seedlings By Ethel Sargant 937 



4. The Origin of Modern Cycads. By AV. C. Worsdell, F.L.S 938 



5. On the Structure of the Stem of Angiopteris evecta, Hnffm. By II. F. 



finoYE 939 



3I0.VjDAY, SEPTEMBER 10. 



1. A Joint Discussion with Section C on the Conditions under which the 



Plants of the Coal Period grew (p. 746) 940 



2. Further Investigations on the Intumescences of Hibiscus vitifolius (Linn.). 



By Elizabeth Dale '. 940 



3. On the Osmotic Properties and their Causes in the Living Plant and 

 Animal Cell. By Professor E. F. Overton 940 



4. The Biology and Cytology of a new Species of Pythium. By Professor 



A. H. Trow 94I 



6. Observations on Pythium. By G. Poirault and E. J. Btjtler 942 



6. Observations on some Chytridineic. By G. Poirault and E. J. Butler 942 



7. On the Azygospores of Entomophthora gloeospora. By Professor P. 

 VuiLLEMix 942 



8. On the Life History of Acrospeira mirabilis (Berk and Br.). By R. H 

 '^i^^S'-s 943 



TUESDAY, SEPTEMBER. 11. 



1 . Embryonic Tissues. By Professor Marshall Ward, F.R.S 943 



2. The Behaviour of the Nucleolus during Karyokinesis in the Root Apex 

 ofPhaseolus. By Harold AVager , 944 



3. On the Presence of Seed-like Organs in Certain Palaeozoic Lvcopods. By 



D. H. Scott, F.R.S ..,.„. 945 



4. The Primary Structure of Certain Palajozoic Stems referred to Araucari- 



oxylon. By D. H. ScoiT, F.R.S 94,5 



5. On the Structure and Affinities of Dipteris conjugata, Reinw., with Notes 

 on the Geological History of the Dipteridins. By A. C. Seward, F.R.S., 

 and Elizabeth Dale 94Q 



6. *Illu8trationH of Sand-binding Plants. Y},'^ Professor F. 0. Bowek, F.R.S. 946 



I"<iex 947 



