1906.] Hemolysis and the Phagocytosis of Red Blood Cells. 547 



possess, in addition to its complementophilic group, another group which 

 possesses the special function of inducing phagocytosis, i.e., the amboceptor 

 would combine the functions of the second and third receptor types of 

 Ehrlich. 



The experiments given in this paper, along with those of Barratt,* tend to 

 show, that contrary to the opinion of Dean, Savtchenko was not correct in 

 his conclusion that the specific fixateur, i.e., the hemolytic amboceptor, 

 induced the phagocytosis of red blood cells, but that on the other hand it is 

 much more probable that this phenomenon is caused by some special body 

 belonging to the class of opsonins. 



I have to thank Dr. F. W ; Twort for performing the experiments on 

 animals. I have also to express my thanks to Mr. J. A. Craw for suggestions, 

 and to Dr. W. Bulloch of the London Hospital for his kind advice and 

 assistance during the course of my work. 



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3. Besredka, "Le serum antistreptoeoccique et son ruode d'action," 'Annales de l'Inst. 



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* Loc. cit. 



