LITEBATUEE CITED 39 



Key to the Genera of Order Labyrinthulales 



Germinating resting spores producing nonflagellate cells. Ldbyrinthula 



Germinating resting spores producing anteriorly uniflagellate cells. 



Lahyrinthomyxa 



Key to the Genera of Plasmodiophorales 



(Based upon Karling, 1942) 



Resting spores not united, mostly nearly filling the host cell. Zoosporangia small, 



producing few zoospores. Plasmodiophora 



Resting spores in small clusters or united in more or less compact cystosori. Except 



Odoniyxa parasitic in tissues of Higher Plants. 

 Spores mostly in 4's or 2's. Zoosporangia unknown. Tetramyxa 



Spores mostly in 8's. Zoosporangia small. In Achlya. Octomyxa 



Spores united to form a hollow sphere. Zoosporangia small. Sorosphaera 

 Spores forming a two-layered flattened disk. Zoosporangia unknown. 



Sorodiscus 

 Spores in a rounded sponge-like mass perforated by large canals. Zoosporangia 



mostly small. Spongospora 



Spores in variable-sized masses, sometimes loose in the cell which they usually 



do not fill. Zoosporangia small. Ligniera 



Spore masses variable in size. Zoosporangia large, elongated, with prominent 



exit tubes. Polymyxa 



Literature Cited 



Abe, Seiji: On the syngamy of some Myxomycetes, Science Repts. Tokyo Bunrika 



Daigaku, B, Zool. 2(18):193-202. Illustrated. 1934. 

 DE Bary, Anton: Die Mycetozoen. Ein Beitrag zur Kenntniss der niedersten 



Thiere, Z. wiss. Zool., 10(1):88-175. Pis. 6-10. 1859. 

 : Comparative Morphology and Biology of the Fungi, Mycetozoa and 



Bacteria. Authorized English translation by Henry E. F. Garnsey, revised 



by Isaac Bayley Balfour, xix-f- 525 pp. 198 figs. Oxford, Clarendon Press, 



1887. 

 Camp, W. G.: The structure and activities of Myxomycete plasmodia, Bull. 



Torrey Botan. Club, 64(5) :307-335. Figs. 1-10. 1937. 

 Cayley, Dorothy M.: Some observations of Mycetozoa of the genus Didymium, 



Brit. Mycol. Soc. Trans., 14:227-248. Pis. 5-6. 1929. 

 Cook, W. R. Ivimey: A monograph of the Plasmodiophorales, Arch. Protistenk., 



80(2) :179-254. Pis. 5-11. Figs. 1-14. 1933. 

 , AND E. J. Schwartz: The life-history, cytology and method of infection 



of Plasmodiophora brassicae Woron., the cause of finger-and-toe disease of 



cabbage and other crucifers, Trans. Roy. Soc. London, B, 218:283-314. 3 pis. 



1930. 

 Dangeard, p. a. : Observations sur la famille des Labyrinthul^es et sur quelques 



autres parasites des Cladophora, Le Botaniste, 24(3/4) :2 17-258. Pis. 22-24. 



Fig. 1. 1932. 

 DuBOSCQ, 0.: Lahyrinthomyxa sauvageaui n.g.n.sp., Prot^omyx^e parasite de 



Laminaria lejolisii Sauvageau, Compt. rend. soc. biol., 84:27-30. Fig. 1. 



1921. 

 : Les plasmodes de Lahyrinthomyxa sauvageaui, ibid., 84 :30-33. Figs. 2-3. 



1921. 



