Classification of the Schizomycetes.' 71 



Geddes and Ewart {Proc. Roy. Sac, xxvii., 1878, p. 481) 

 confirm Lankester's results in the main. J. C. Ewart 

 {Quart. Jour. Micr. Set., 1878, p. 161), after investigating 

 Bacillus anthracis, advocates the doctrine that Micrococcus, 

 Bacterium, and Bacillus are only phases of the same life- 

 history, "which," he says, "is doubtless common to all 

 Bacteria.'' 



Cienkowski ("Zur Morphologie der Bacterien," 1878) 

 held (i) that the zoogloea form is analogous to the Palmella 

 form of chlorophyllose Algse ; (2) that Crenothrix, Lepto- 

 thrix, and Cladothrix give rise to the zoogloea forms of 

 Bacteria, e.g. of B. Termo and B. Lineola ; (3) that Bacteria 

 are transformed into Micrococci by subdivision, and into 

 Leptothrix by continued growth; (4) that Micrococcus, 

 Bacterium, and the so-called Torula forms are not genetically 

 distinct. 



W. Zopf (" Ueber den genetischen Zusammenhang von 

 Spaltpilz-formen," 1881) not only confirmed the views 

 which Cienkowski had previously expressed of the genetic 

 connection of Micrococcus, Bacillus, and Leptothrix, but. 

 also asserted that Vibrio, Spirillum, Spirochseta, and 

 Ophidomonas can enter into the same life-cycle with these. 

 He investigated chiefly Cladothrix, Beggiatoa, and Creno- 

 thrix. But he allows that not all the Spaltpilze have this 

 pleomorphism, so that it is quite possible that some of them 

 occur under one form only. 



C. von Nageli (" Untersuch. iiber niedere Pilze " (1882), 

 i. pp. 129-139) maintained that all known forms of Schizo- 

 mycetes are connected by intermediate links, and that any 

 division into species, however convenient for the purposes 

 of description, has no scientific value. He considers that 

 the same species can occur in widely different forms, ac- 

 cording to the circumstances of its nutrition. 



