366 PROTOZOOLOGY 



//. reticulata Penard (Fig. 166, b). Envelope colorless or pale 

 yellow, proliferations regularly polygonal with raised borders; 

 stalk solid, straight; nucleus central; 1 contractile vacuole; each 

 pseudopodium arises from a pore located in the center of a facet; 

 solitary; capsule about 25^ in diameter; body about 12^1 in diame- 

 er; stalk about TO^i by l.Sju; in marshy pools. 



Genus Blaster Grimm. Envelope spherical, delicate, penetrated 

 by numerous more or less large pores; without stalk; pseudopodia 

 many, straight filopodia. 



E. greeffi G. (Fig. 166, c). Diameter of envelope 20^1; envelope 

 delicate, colorless; many pseudopodia; in peaty soil. 



Genus Choanocystis Penard. Spherical envelope with perfora- 

 tions which possess conical borders; openings of cones provided 

 with funnel-like expansions, edges of which nearly touch one 

 another; fresh water. 



C. lepidula P. (Fig. 166, d). Diameter 10-13/x; envelope delicate; 

 1 or more contractile vacuoles; pseudopodia very long. 



Family 9 Myriophryidae Poche 



Genus Myriophrys Penard. Spherical or ovoid, covered with a 

 protoplasmic envelope containing scales(?), surrounded by nu- 

 merous fine processes; endoplasm vesicular; a large nucleus 

 eccentric; a large contractile Vacuole; long pseudopodia granu- 

 lated and attenuated toward ends. 



M. paradoxa P. (Fig. 166, e). Average diameter 40)u; in fresh- 

 water swamps. 



References 



Belar, K. 1922 Untersuchungen an Actinophyrs sol Ehrenberg. 



I, II. Arch. f. Protistenk., Vols. 46, 48. 

 Cash, J. and G. H. Wailes 1921 The British freshwater Rhizo- 



poda and Heliozoa. Vol. 5. 

 Leidy, J. 1879 Freshwater Rhizopods of North America. Rep. 



U. S. Geol. Survey. Vol. 12. 

 Penard, E. 1904 Les H eliozoaires d'eau douce. Geneva. 

 1905 Les Sarcodines des Grands Lacs. Geneva. 



