S. G. Paine and H. Stanspibld 39 



the formalin solution (1 : 400) would be much safer and would probably 

 have the desired effect. 



SUMMARY 



1. A description is given of a disease of Protea cynaroides which is 

 characterised by the development on the leaves of blister-like spots of 

 a brown colour, or of sunken spots of a brown colour with bright ver- 

 milion border. 



2. The causal organism described is a bacterial parasite for which the 

 name Pseudotnonas Proteamaculans is suggested. 



3. The attacked cells become filled with an amber coloured resin- 

 like substance in which apparently the bacteria become embedded and 

 suffer a process of solution. This solution is either one of autolysis, or 

 there may possibly be an analogy with the bacteriolytic action of the 

 serum of an immunised animal. 



4. The vermiHon pigment is shown to be closely allied to phloro- 

 tannin red and the resin-Uke substance is believed to be of the nature of 

 a resino-tannin. 



