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HANDBOOK OF PROTOZOOLOGY 



an irregular mass in the cytoplasm. The organism is as a rule 

 multinucleate, but divides in the encysted stage into daughter 

 individuals with one or many nuclei. The multinucleate cysts 

 are often reddish, owing to the presence of the carotin. 



Genus Vamp3rrella Cienkowski. The organism appears 

 Heliozoa-like because of numerous filopodia which radiate. The 

 cytoplasm is distinctly differentiated into the ectoplasm and 

 endoplasm. The latter is vacuolated or granulated and often con- 

 tains reddish carotin granules. Numerous vesicular nuclei and 

 contractile vacuoles. Size varies from 50 to 700 microns. Multi- 

 nucleate cysts may possess a stalk. Feed on the contents of 

 algae in both fresh and salt waters. Several species. 



Fig. 



a, b 



c, d. 



e. 



f. 



Vampyrella lateritia. X400. a, a rounded individual (after 

 Leidy); b, young individuals budding out from a cyst (after 

 Dofiiein). 



Nuclearia delicatula. X225 (After Cash). 

 Arachmila impatiens. X500 (After Dobell). 

 Chlamydomyxa montana, encysted, with numerous secondary 



cysts. X about 400. (After Penard). 



Vampyrella lateritia (Fresenius) ( = F. spirogyra Cienkowski) 

 (Fig. 68, a, h). Body spherical and orange-red in color except 

 the hyaline ectoplasm. Feed on Spirogyra and other algae. 



Genus Nuclearia Cienkowski. Body more or less rounded 



