434 PROTOZOOLOGY 



Genus Sorosphaera Schroter. Parasitic in Veronica spp. 



Genus Tetramyxa Goebel. In Ruppia, Zannichellia, etc. 



Genus Octomyxa Couch, Leitner and Whiffen. In Achlya glomerata. 



Genus Sorodiscus Lagerheim and Winge. In Chara, Callitriche, etc. 



Genus Polymyxa Ledingham. In Triticum, etc. 



Genus Membranosorus Ostenfeld and Petersen. In Heteranthera 

 dubia. 



Genus Spongospora Brunchorst. Parasitic in Solanum; the dis- 

 eased condition of potatoes is known as powdery or corky scab. 



Genus Ligniera Maire and Tison. In Alisma, Juncus, etc. 



References 



Cook, W. R. I.: (1933) A monograph of the Plasmodiophorales. 

 Arch. Protist., 80:179. 



de Bary, A.: (1864) Die Mycetozoa. Leipzig. 



(1884) Vergleichende Morphologie und Biologie der Pilze, 



Mycetozoen, und Bacterien. Leipzig. 



Elliott, E. W.: (1948) The sperm-cells of Myxomycetes. J. Wash- 

 ington Acad. Sc, 38:133. 



Hagelstein, R.: (1944) The Mycetozoa of North America. New 

 York. 



Jahn, E.: (1901-1920) Myxomycetenstudien. I-X. Ber. deutsch. 

 bot. Ges., 19, 20, 22-26, 29, 36 and 37. 



- (1928) Myxomycetenstudien. XII. Ibid., p. 80. 



Jones, P. M.: (1928) Morphology and cultural study of Plasmodio- 



phora brassicae. Arch. Protist., 62:313. 

 Karling, J. S.: (1942) The Plasmodiophorales. New York. 

 Lister, A.: (1925) A monograph on the Mycetozoa. 3 ed. London. 

 MacBride, T. H.: (1922) North American slime molds. 2 ed. New 



York. 



— and Martin, G. H.: (1934) The Myxomycetes. New York. 

 Milovidov, P. F.: (1931) Cytologische Untersuchungen an Plasmo- 



diophora brassicae. Arch. Protist., 73:1. 



Palm, B. T. and Burk, Myrle: (1933) The taxonomy of the Plas- 

 modiophoraceae. Ibid., 79:262. 



Raper, K. B.: (1940) Pseudoplasmodium formation and organiza- 

 tion in Dictyostelium discoideum. J. Elisha Mitchell Sc. Soc, 

 56:241. 



Singh, B. N.: (1947) Studies on soilAcrasieae. I. J. Gen. Microbiol., 

 1:11. 



(1947a) II. Ibid., 1:361. 



