342 PROTOZOOLOGY 



Genus Polymyxa Ledingham. In Triticum, etc. 



Genus Membranosorus Ostenfeld and Petersen. In Heterahthera 

 duhia. 



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 



DE Bary 1864 Die Mycetozoa. Leipzig. 



Hagelstein, R. 1944 The Mycetoza of North America. New York. 



Jahn, E. 1901-1920 Myxomycetenstudien. I to X. Ber. Deutsch. 



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

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



phora brassicae. Arch. f. Protistenk., Vol. 62. 

 Karling, J. S. 1942 The Plasmodiophorales. New York. 

 Lister, A. 1925 A monograph on the Mycetozoa. 3rd ed. London. 

 MacBride, T. H. 1922 North American slime molds. 2nd ed. New 



York. 

 and G. H. Martin 1934 The Myxomycetes. New York. 



