ACTINOPODA, HELIOZOA 515 



ous fine processes; endoplasm vesicular; a large nucleus eccentric; a 

 large contractile vacuole; long pseudopodia granulated and attenu- 

 ated toward ends. 



M. paradoxa P. (Fig. 217, e). Average diameter 4%; in fresh-water 

 swamps. 



References 



Belar, K.: (1923) Untersuchungen an Actinophrys sol. I. Arch. 



Protist., 46:1. 



(1924) II. Ibid., 48:371. 



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



poda and Heliozoa. 5. London. 

 Leidy, J.: (1879) Freshwater Rhizopods of North America. Rep. 



U. S. Geol. Surv. Terr., 12. 

 Okada, Y. K.: (1930) Transplantationsversuche an Protozoen. 



Arch. Protist., 69:39. 

 Penard, E. : (1905) Les Heliozoaires d'eau douce. Geneva. 



(1905a) Les Sarcodines des grands lacs. Geneva. 



Roskin, G.: (1929) Neue Heliozoa-Arten. I. Arch. Protist., 66:201. 

 Rumjantzew, A. and Wermel, E.: (1925) Untersuchungen ueber 



den Protoplasmabau von Aetinosphaerium eichhorni. Ibid., 52: 



217. 

 Speeth, Caroline: (1919) Ueber Kernveranderungen bei Aeti- 

 nosphaerium in Hunger- und Encystierungskulturen. Ibid., 40: 



182. 

 Stern, C: (1924) Untersuchungen ueber Acanthocystideen. Ibid., 



48:437. 

 Valkanov, A.: (1928) Protistenstudien. III. Ibid., 64:446. 



(1940) Die Heliozoen und Proteomyxien. Ibid., 93:225. 



Wetzel, A. : (1925) Zur Morphologie und Biologie von Raphidocystis 



infestans n. sp., etc. Ibid., 53 : 135. 



