PKOTOZOA. 23 



■wlien it is said to be ^'encysted " (fig. 4, c). The nucleus then disai:)pears, and 

 tlie sarcode of the body breaks up into little masses, wliich. are at first rounded, 

 but afterwards become pointed at botli ends, wlien they are called "ijseudo- 

 navicellpe" (fig. 4, d). The cyst then breaks and the }iseudonavicellie escape, 

 when they give origin to little masses of sarcode, which have the power of 

 active movement and of throwing out pseudnpodia, thus coming closely to 

 resemble the animalcule which will be directly described as the Amwha (fig. 4, 

 (/ and h). These little amceba-like masses, if they find a suitable lf)cality, 

 are finally developed into nt\s ■Orc(jari)ue. 



