PARASITES OF PROTOZOA 



1031 



as Connell suggested that they might be. Organisms with a peg form, 

 differentiated sharply into a clear section at the broader end and a 

 deep-staining section, are frequent in Stephanonympha (Fig. 216A). 

 These have a general resemblance to the peg-formed parasite (Fig. 

 219D, E) in Trichonympha campanula (Kirby, 1932a) , but are larger. A 

 unique type is the spindle-shaped organism (Fig. 216B), up to 20 p 

 in length, with a deeply stainable area at one end, which occurs usually 



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t^ % 





3 



Figure 216. A, microorganisms in Stephanonympha sp. from Kalotermes jeannelanus ; 

 B, spindle-shaped organisms in Caduceia sp. from Neotermes greeni. (Original.) 



in groups in a species of Caduceia from Neotermes greeni. In most 

 termites the infection of Caduceia was only from 1 to 2 percent, but 

 occasionally about half the flagellates were parasitized. With the larger 

 forms were shorter, slender ones. The smallest forms were usually 

 gathered into stout spindle-shaped groups, suggesting origin by splitting 

 of a short, stout spindle. Many other bacterial parasites in termite flagel- 

 lates have been studied by the writer. 



Spirochetes frequently invade the cytoplasm of flagellates of termites. 



