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A 586. The Stress-Strain Properties of Nitro-Cellulose and the Law of its Optical Behaviour. By 
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B 378. On the Structure and Affinities of Acmopyle Pancheri, Pilger. By Birbal Sahni, M.A., M.Sc., 
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B 379. On the Calcification of the Vertebral Centra in Sharks and Bays. By W. G. Bidewood, D.Sc., 
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B 380. The Life-History and Cytology of Synchytrium Endobioticum (Schilb.), Perc., The Cause of Wart 
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