VI 



No. B 604.— February 1, 1915. 



PAGE 



Observations ou the Life-Cycle of a New Flagellate, Helkesimastix fcecicola, n.g., 

 n.sp. : Together with Bemarks on the Question of Synganiy in the Trypano- 

 somes. By H. M. Woodcock, D.Sc, Assistant to the Professor of Protozoology, 

 University of London, and G. Lapage, M.Sc, Assistant Lecturer and Demon- 

 strator in Zoology, Victoria University, Manchester. Communicated by 

 Prof. S. J. Hickson, F.E.S. (Plates 13 and 14) 353 



The Antagonistic Action of Carbon Dioxide and Adrenalin on the Heart. By 

 S. W. Patterson, M.D., Beit Memorial Research Fellow. Communicated by 

 Prof. Starling, F.E.S 371 



No. B 605.— March 1, 1915. 



The Influence of Salt-Concentration on Haemolysis. By W. W. C. Topley, M.B., 

 M.R.C.P., Bacteriologist to Charing Cross Hospital. Communicated by 

 Dr. F. W. Mott, F.R.S , 396 



The Influence of the Hydrogen Concentration upon the Optimum Temperature of a 

 Ferment. By Arthur Compton, M.B., D.Sc. (N.U.I.), Imperial Cancer Research 

 Fund. Communicated by Prof. W. Bulloch, F.R S 408 



The Life-Cycle of Cladocera, with Remarks on the Physiology of Growth and 

 Reproduction in Crustacea. By Geoffrey Smith, M.A., Fellow of New College, 

 Oxford. Communicated by E. S. Goodrich, F.R.S 418 



Lepidostrobus kentuckiensis, nomen nov., formerly Lepidottrobus Fischeri, Scott and 



Jeffrey : a Correction. By D. H. Scott, For. See. R.S. 435 



No. B 606.— April 1, 1915. 



Investigations on Protozoa in Relation to the Factor Limiting Bacterial Activity in 

 Soil. By T. Goodey, M.Sc, Protozoologist, Research Laboratory in Agricultural 

 Zoology, University of Birmingham. Communicated by Prof. F. W. Gamble, 

 F.R.S 437 



On the Mesodermic Origin and the Fate of the So-called Mesectoderm in 

 Petromyzon. By S. Hatta (Sapporo, Japan). Communicated by Prof. E. W. 

 MacBride, F.R.S 457 



On the Variation in the Growth of Mammalian Tissue in Vitro according to the Age 

 of the Animal. By Albert J. Walton, M.S., F.R.C.S., M.B., L.R.C.P., B.Sc. 

 Communicated by Prof. W. Bulloch, F.R.S. (Plate 15) 476 



No. B 607.— May 3, 1915. 



The Influence of Homodromous and Heterodromous Electric Currents on Trans- 

 mission of Excitation in Plant and Animal. By Prof. J. C. Bose, M.A., D.Sc, 

 C.S.I. , CLE., Presidency College, Calcutta. Communicated by Prof. S. H. 



Vines, F.R.S 483 



The Measurement of Arterial Pressure in Man. I. — The- Auditory Method. By 



Martin Flack, Leonard Hill, F.R.S., and James McQueen 508 



The Measurement of Arterial Pressure in Man. II. — A Schematic Investigation. 



By Martin Flack, Leonard Hill, F.R.S., and James McQueen 516 



