140 PROTESTS AND DISEASE 



De Bary mentions that some of the colouring matter is 

 soluble in alcohol. 



Protoplasmic motion or Streaming. This is seen in 

 most plasmodia. The stream is in the course of the strands 

 of the network, and it follows their subdivisions, but it may 

 be arrested in a main strand and continue in side branches. 

 At the edge of a plasmodium streams may run in opposite 

 directions in neighbouring pseudopodia. 



Streaming may be modified into rotatory motion. In 

 Fig. 38, 2, is an instance. In an encysted plasmodium the 

 endoplasm and incepted bodies were in " perpetual rotation." 

 Another resting plasmodium is shown in 3 ; 4 is the same 

 plasmodium become active, and it has fine processes resem- 

 bling cilia covering its hinder third. A similar condition is 

 seen in 5, which represents the end of a receding strand. 



A. Lister filtered through wet cotton-wool a plasmodium 

 of Badhamia utric. containing spores of Slereum. The spores 

 were left behind, the plasmodium passed through emerging 

 in separate parts which fused together again. 



Plasmodia of different species vary greatly in consistence. 

 From those of Badhamia utricularis and Didymium difforme 

 I have been able under water to detach portions by a needle, 

 float them on to a slide ; and, when covered, they have resumed 

 all their activities. In another species I found abundant 

 on straws of a recent part of a heap of horse-stable manure 

 the plasmodium crept actively from the straws over the 

 wet surface of a Petri dish and examined there under a 



