394 GENERAL SYSTEMATIC BACTERIOLOGY 



It is included as the fifth order of the Schizomycetes. 



Winslow et al. (Committee Soc. Am. Bact., 1917, p. 549, 1920, p. 

 196) recognized the order with the following diagnosis. "Cells united 

 during the vegetative stage into a pseudoplasmodium which passes 

 over into a highly-developed cyst-producing resting stage." 



It is also recognized by Castellani and Chalmers (1919, p. 924) as 

 the third order of the Schizomycetacea, and by Bergey et al. (1923, p. 

 412) as the fifth order of the Schizomycetes. 



Mjrxobacterieae. A class name proposed by Heller (1921, p. 549) 

 for the second class of the phylum Bacteria. She states "Bacteria 

 which join to form a complex fruiting body." 



Myxobacterium. Under the heading "A New Myxobacterium" 

 an abstract was printed of a paper by Faull (1915, p. 469). Apparently 

 the word is not used binomially. The organism evidently is one of 

 the Myxobacter idles (q.v.). 



Myxobactrales. A name proposed by Clements (1909, p. 8) for 

 the second order of the Schizomycetes. His description is: "Cells 

 rod-like, motile, fission in one plane ; cells secreting a gelatinous base and 

 forming pseudoplasmodia, then passing into cysts, or spore masses 

 which are often stalked (cystophore)." 



One family, Myxohacteriaceae, is included. It may be regarded as 

 variant of the spelling Myxobacteriales, q.v. 



Myxobazillus. A variant of Myxobacillus, q.v. used by Gonnermann 

 (1908, p. 877). 



Mjrxobotrys. A generic name of a fungus proposed by Zukal (1896, 

 p. 346) for the species M. variabilis. The generic description is as 

 foUows : 



Die Sporen in dichten Kopfchen auf der blasigen Erwerterung an den Enden 

 eines einfachen oder schwach verzweigten Sporentriigers, oder ohne Trager direct 

 auf eineim dunnen Hypothallus oder dem Substrate aufsitzend. 



It was later shown that this was a redescription of an old genus, 

 one of the Myxobacteriaceae, Chondromyces, (q.v.). The name is there- 

 fore invalid. 



Mjrxobotrysaceae. A family created by Zukal (1896, p. 436) to 

 include his mold genus Myxobotrys, with the following description: 

 "Die Sporen entstehen durch Sprossung des Plasmodiums, ohne vor- 

 hergehende Sonderung des Plasma in bestimmte Portionen." When 

 it was shown that the genus Myxobotrys was invalid, and the organism 

 did not belong to the fungi, this family name was invalidated. 



