SMALLPOX, SYPHILIS, CANCER, ETC. 165 



Here for the first time in biological literature I saw some- 

 thing relating to organisms of the same category as Cobbold's 

 psorosperms. 



Can one identify the cyst-contents of this disease with the 

 Olpidiaceae ? There are two difficulties ; firstly, the cytology 

 of such olpidians as Rozella septigena &c. that appear to form 



7 



FIG. 46. CYSTIC DISEASE OF THE URINARY TRACT. Section of a cyst 

 in the pelvis of the kidney under a low power, showing the general 

 character of the cyst-contents. At a is an invagination of the mucous 

 membrane, as if preparatory to formation of a new cyst (from Part II) ; 

 2, parasited with a nucleus of fragmented chromatin ; 3, ibid, with 

 a well-formed nucleus ; 2 and 3, x 1000 diams., from the Trans. 

 Path. Soc. 1892. 



plasmodia with one another or with host-cells has not been 

 fully established ; secondly, the cystic disease has only been 

 examined 24 hours or more post mortem. At present we 

 can hardly assign a definite place in taxonomy to the 

 parasite. 



All known Olpidiaceae, whether they form plasmodia 



