CILIATA 299 



genie for man. The parasite was first described in 1857; it is 

 frequently present in the intestinal tract of swine, and though 

 usually harmless it may give rise in them to a subacute form of 

 dysentery. Cases of human infection have been reported, most of 

 which have been found to be suffering from chronic intestinal 

 catarrh. 



The organism has somewhat the form of an egg with a funnel- 

 shaped mouth opening. The ectoplasm is covered with thick 

 bands of cilia which give the organism a striated appearance. 

 Multiplication usually takes place by binary division ; conjuga- 

 tion also occurs. 



CHLAMYDOZOA 



A small group of minute coccus-like organisms have been de- 

 scribed which have the power of enveloping themselves with a 

 covering derived from the cell substance of the host. Certain 

 authorities have created a special class named chlamydozoa for 

 them (Greek stem, chlamys a mantle) and include them with 

 the protozoa. A number of observers believe that members of 

 the group may be the causal agents of rabies, smallpox, scarlet 

 fever, trachoma, and other diseases. No definite proof, however, 

 has as yet been advanced. 



