Vll 



No. B. 521.— June 25, 1906. 



PAGE 



The Internal Anatomy of Stomoxys. By F. Tulloch, Lieut. R.A.M. Corps. Com- 

 municated by Professor E. Bay Lankester, F.B.S 523 



The Specificity of the Opsonic Substances in the Blood Serum. By "William Bulloch, 



M.D., and G. T. Western, M.A., M.B. Communicated by Leonard Hill, F.R.S. 531 



On the Belationship between Haemolysis and the Phagocytosis of Bed Blood Cells. 



By R D. Keith, M.A., M.D. Communicated by Leonard Hill, F.R.S 537 



Upon the Properties of an Antityphoid Serum obtained from the Goat. By Allan 



Macfadyen, M.D. Communicated by Dr. C. J. Martin, F.R.S 548 



On the Synapsis in Amphibia. By J. E. S. Moore, A.R.C.S., F.L.S., Director of the 

 Cancer Research Laboiatories, University of Liverpool, and Miss A. L. 

 Embleton, B.Sc. Communicated by J. Bretland Farmer, F.R.S., F.L.S. 

 (Plates 20— 23) 555 



On the Existence of Permanent Forms among the Chromosomes of the First Maiotic 

 Division in Certain Animals. By J. E. S. Moore, A.B.C.S., F.L.S., Director of 

 the Cancer Research Laboratories, University of Liverpool, and George Arnold. 

 Communicated by J. Bretland Farmer, F.R.S. (Plates 24 and 25) 563 



The Action of Pituitary Extracts upon the Kidney. By E. A. Schafer, F.R.S., and 



P. T. Herring (Abstract) 571 



Index 573 



