74 SOME MINUTE ANIMAL PARASITES 



testinal contents, and the water in which the molluscs 

 were kept. The significance of these forms was con- 

 sidered, but until the actual formation of spirochaetes 

 from them and of them from spirochaetes had been 

 repeatedly seen, and confusion with extraneous 



A. B. C. D. 



FIG. 20 To SHOW THE FORMATION OF OVOID OR COCCOID 

 BODIES (AS IN SPIROCH^TA BALBIANII) WITHIN PART OF A 

 SPIROCHAETE. ALL DETAILS OF MEMBRANE, ETC., OMITTED 

 FOR THE SAKE OF CLEARNESS 



A, Normal spirochaete, with chromatin bars and tenuous cyto- 

 plasm ; B, concentration of protoplasm around the bars 

 commencing ; C, ovoid bodies differentiating ; Z>, fully formed 

 ovoid bodies within the periplast ; E, periplast ruptured and 

 degenerating, ovoid or coccoid bodies (F) escaping 



bodies absolutely excluded, the results were not 

 published. The spirochaete that is about to form 

 " spores" by multiple transverse fission shows no 

 difference at first from an ordinary form. Its 

 chromatin is disposed in bars, and the cytoplasm is 

 distributed. But soon the protoplasmic contents of 



