70 MORPHOLOGY OF THE BACTERIA. 



B. Filaments with false ramifi- 

 cation : 



1. Filaments cylindri- j CLADOTHRIX, Cohn. 

 cal, colorless . . ) STREPTOTHRIX, Cohri. 



2. Filaments cylindri- 



cal, with phyco- 

 . chrome . . . 



CALOTHRIX, Ag. 



SCYTONEMA, Ag. 



3. Filament in chaplets . MERIZOMYRIA, Kg. 



4. Filaments flagelli- J SCHIZOSIPHON) K 

 form.slender towards GEOCYC K 

 the extremity . . ) 



An inspection of this table shows that each of 

 the genera of the ancient group of the bacteria 

 has been placed beside some genus of oscillatori- 

 aceoe, which it resembles by its organization, 

 Micrococcus and Bacterium, beside Aphanotkece 

 and Aphanocapsa ; Bacillus, beside Leptothrix 

 and Beggiatoa ; Vibrio and Spirillum, beside Spi- 

 rulina. 



These affinities are undeniable, and the advan- 

 tages of such a classification are manifest ; but, in 

 a work like this, we cannot think of employing it. 

 We preserve, then, in a distinct group the schizo- 

 phytes deprived of chlorophyll, which may be 

 arranged in the four primary divisions of Cohn 

 with the exception of Sarcina, Ascococcus, Creno- 

 thrix, etc., and the other genera created recently 

 by this botanist. 



Thus we will describe successively : 



1. The Spherobacteria of Cohn; and beside them 

 the different Monas recently studied, the Micrococ- 



