70 - MORPHOLOGY OF THE BACTERIA. 



B. Filaments with false ramifi- 

 cation : 



1. Filaments cylindri- j CLADOTHRIX, Colin, 

 cal, colorless . . ) STREPTOTHRIX, Cohii. 



2. Filaments cylindri- ) 



cal, with phyco- CALOTHBIX, Ag. 



chrome .... ) SCYTONBMA, Ag. 



3. Filament in chaplets . MERIZOMYRIA, Kg. 



4. Filaments flagelli- 

 form, slender towards 

 the extremity . . 



SCHIZOSIPHON, Kg. 

 GEOCYCLUS, Kg. 



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- 

 acese, 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- 



