332 PROTOZOOLOGY 



differentiation of cytoplasm distinct, nucleus vesicular; refractile 

 waste granules; pseudopodia branching; fresh water or coprozoic. 



C. stercorea C. (Fig. 152, k). Test 18-20^ by 12-15/x; mature 

 cysts yellowish brown, 12-1 5m in diameter; multiplication by 

 budding ; coprozoic and fresh water. 



Genus Cochliopodium Hertwig et Lesser. Test thin, flexible 

 expansible and contractile; with or without extremely finehair- 

 Hke processes; pseudopodia blunt or pointed, but not acicular. 

 Several species. 



C. hilimbosum (Auerbach) (Fig. 152, h). Test hemispherical; 

 pseudopodia conical with pointed ends; test 24-56/^ in diameter; 

 fresh water among algae. 



Genus Amphizonella Greeff. Test membranous with a double 

 marginal contour; inner membrane smooth, well-defined; outer 

 serrulate; aperture inverted; a single nucleus; pseudopodia blunt, 

 digitate, and divergent. 



A. violacea G. (Fig. 152, c). Test patelliform, violet-tinted; with 

 chlorophyllous corpuscles and grains; sluggish; average diameter 

 160m; fresh water. 



Genus Zonomyxa Miisslin. Test rounded pyriform, flexible, 

 chitinous, violet-colored; endoplasm vacuolated, with chloro- 

 phyllous particles; several nuclei; pseudopodia simple, not digi- 

 tate; fresh water. 



Z. violacea N. (Fig. 152, d). A single lobular pseudopodium with 

 acuminate end; 4 nuclei; diameter 140-160//; actively motile 

 forms 250/1 or longer; among sphagnum. 



Genus Microcorycia Cockerell. Test discoidal or hemispherical, 

 flexible, with a diaphanous continuation or fringe around periph- 

 ery, being folded together or completely closed; crown of test 

 with circular or radial ridges; body does not fill the test; 1-2 

 nuclei; pseudopodia lobular or digitate; fresh water. A few spe- 

 cies. 



M. flava (Greeff) (Fig. 152, e, /). Test yellowish brown; crown 

 with few small foreign bodies; endoplasm with yellowish brown 

 granules; 2 nuclei; contractile vacuoles; diameter SO-lOO/i; young 

 individuals as small as 20/1; in moss. 



Genus Parmulina Penard. Test ovoid, chitinoid with foreign 

 bodies; aperture capable of being closed, a single nucleus, 1 or 

 more contractile vacuoles; fresh water. A few species. 



P. cyathus P. (Fig. 152, g, h). Test small, flexible; ovoid in aper- 



