382 PROTOZOOLOGY 



movement and contraction of body; with or without spinous pro- 

 jections. 



C. coronata Penard (Fig. 178, i). 6-12 spines; 140^ in diameter; 

 in moss. 



Genus Pamphagus Bailey. Test hyaline membranous, flexible; 

 aperture small; body fills the envelope completely; spherical nuc- 

 leus large; contractile vacuoles; filopodia long, delicate, branching, 

 but not anastomosing; fresh water. 



P. mutabilis B. (Fig. 178, j). Envelope 40-100^ by 28-68/1. 



Genus Plagiophrys Claparede and Lachmann. Envelope thin, 

 hyaline, changeable with body form; usually elongate-oval with 

 rounded posterior end; narrowed at other half; envelope finely 

 punctated with a few small plates; aperture round; cytoplasm 

 clear; nucleus large; pseudopods straight filopodia, sometimes 

 branching ; fresh water. 



P. parvipunctata Penard (Fig. 178, A;). Envelope 50/i long. 



Genus Leptochlamys West. Test ovoid, thin transparent chitinous 

 membrane, circular in optical section; aperture end slightly ex- 

 panded with a short neck; aperture circular, often oblique; body 

 fills test; without vacuoles; pseudopodium short, broadly expanded 

 and sometimes cordate; fresh water. 



L. ampullacea W. (Fig. 179, a). Nucleus large, posterior; with 

 green or brown food particles; test 45-55/i by 36-40/* in diameter; 

 aperture 15-17/i; among algae. 



Genus Chlamydophrys Cienkowski. Test rigid, circular in cross- 

 section; aperture often on drawn-out neck; body fills the test; zonal 

 differentiation of cytoplasm distinct; nucleus vesicular; refractile 

 waste granules; pseudo podia branching; fresh water or coprozoic. 



C. stercorea C. (Fig. 179, k). Test 18-20/i by 12-15/1 ; mature cysts 

 yellowish brown, 12-15/i in diameter; multiplication by budding; 

 coprozoic and fresh water. 



Genus Cochliopodium Hertwig and Lesser. Test thin, flexible, 

 expansible and contractile; with or without extremely fine hair-like 

 processes; pseudo podia blunt or pointed, but not acicular. Several 

 species. 



C. bilimhosum (Auerbach) (Fig. 179, 6). Test hemispherical; pseu- 

 dopodia conical with pointed ends; test 24-56/i 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; pseudo podia blunt, 

 digitate, and divergent. 



