94 SPIROCELETES. 



found in ticks (Fig. 70) . He believes that this spiro- 

 chaete divides longitudinally and has terminal appen- 

 dages of periplast and an undulating membrane ; but as 

 he notes that this last only becomes visible on addition 

 of glycerine, it is likely that the apparent membrane 

 was an artifact. Gonder also describes dots of chro- 

 matin in the substance of the organism, which at other 

 times are replaced by a chromidial network. 



SPIROCH^ETA LUTR^E. 



(Prowazek, 1907.) 



This organism was found by Prowazek in the blood 

 of the otter. The only description which he gives of 

 it is that it is a broad, band-shaped spirochsete, with 

 blunt ends, and that large chromatin bodies (Chro- 



FIG. 71. Spirochaeta lutrae and rod-shaped bodies. (Prowazek.) 



matinbrocken) were visible in its protoplasm (Fig. 71). 

 Whether it had any relation to certain oval bodies 

 ("like pbrine corpuscles") present in the blood along 

 with it, he leaves undetermined. 



SPIROCH.ETA THEILERI. 



(Laveran, 1902.) 



This organism was found by Theiler in cattle suf- 

 fering from a disease characterised by fever, diarrhoea, 

 and enlargement of the spleen. Disappearance and re- 

 appearance of the spirochaetes may take place, as in 

 the relapses of recurrent fever. The parasite is from 



