GENERAL CHARACTERS OF SPIROCELETES. 39 



figures which he gives of the encysted stage are not very 

 convincing. In the case of Sp. anodonta I have found 

 rolled up specimens after keeping the organisms for 

 a day or two in the fluid which escapes from the mantle- 

 cavity of the mussel (Fig. 42). These forms in some 



FIG. 46. Spirochaeta anodontae; stages in formation of resting 

 spore (?). 



instances lay in or in close apposition to large epithe- 

 lioid cells ; but whether the spirochaetes entered the cells 

 at this stage, or the cell engulfed the spirochaete, or the 

 apposition was merely due to some physical attraction, 

 I cannot say (compare Figs. 69, 86, 87). The cells were 



V 



FIG. 460. Portion of Cladothrix putridogenes (Veszpremi) for 

 comparison with Fig. 46. 



necessarily somewhat degenerated after being kept so 

 long in the fluid, and it seems unlikely that they would 

 have been able to engulf the spirochaetes. 



Rolled up specimens of Sp. duttoni were seen by 

 Mayer, and of Sp. pallida by Levaditi and others. 



