PROCEEDINGS 



OF 



THE ROYAL SOCIETY. 



Series B. Vol. 81. 



No. B547. 



BIOLOGICAL SCIENCES. 



CONTENTS. 



Page 



The British Freshwater Phytoplankton, with Special Reference to the 

 Desmid-plankton and the Distribution of British Desmids. By W. WEST, 

 F.L.S., and G. S. WEST, M.A., D.Sc, F.L.S 165 



On the Presence of Haem-agglutinins, Haem-opsonins, and Haemolysins in 

 the Blood obtained from Infectious and Non-Infectious Diseases in Man. 

 (Second Report.) By LEONARD S. DUDGEON, F.R.C.P. Lond. . . 207 



The Theory of Ancestral Contributions in Heredity. By KARL PEARSON, 



F.R.S. 219 



On the Ancestral Gametic Correlations of a Mendelian Population mating at 



Random. By KARL PEARSON, F.R.S 225 



The Origin and Destiny of Cholesterol in the Animal Organism. Part V.— 

 On the Inhibitory Action of the Sera of Rabbits fed on Diets containing 

 Varying Amounts of Cholesterol on the Haemolysis of Blood by Saponin. 

 By MARY T. FRASER and J. A. GARDNER . . • .' . . 230 



The Influence of Glucosides on the Growth of Acid-fast Bacilli, with a New 

 Method of Isolating Human Tubercle Bacilli directly from Tuberculous 

 Material contaminated with other Micro-organisms. (Preliminary Note.) 



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By F. W. TWORT 



248 



AUG * 'M 



Price Three Shillings. 



No. B 547. 



June 5, 1909. 



