CLASSIFICATION OF THE BACTERIA. 69 



3. Filaments cylindrical, 

 articulated, with co- 

 nidia : 



Filaments colorless CRENOTHRIX, Cohn. 

 Filaments with phy- 

 cochrome . . . CHAM^BSIPHON. 



4. Filaments spiral 

 without phycochrome : 



Filaments, short, 



light, sinuous . VIBRIO, Ehr. 



Filaments, short, spi- 

 ral, rigid . . . SPIRILLUM, Ehr. 



Filaments, long, spi- 

 ral, flexible . . SPIEOCH^TE, Ehr. 

 with phycochrome : 



Filaments long, spi- 

 ral, flexible . . SPIRULINA, Link. 



5. Filaments in chaplet : 

 Filaments, without 



phycochrome . . STREPTOCOCCUS, Billr. 

 Filaments with phy- ) ANAB^NA, Bory. 

 cochrome . . . i SPERMOSIRA, Kg. 



6. Filament flagelliform, 



slender MASTIGOTHRIX, etc. 



b. Filaments united into glai- 

 ry families by an intercel- 

 lular substance : 



1. Filaments cylindrical, 



colorless MYCONOSTOC, Cohn. 



2. Filaments cylindri- 1 CHTHONOBLASTUS . 

 cal, with phyco- LlMNOCLIDE , Kg . . 

 chrome . . . . ; 



3. Filaments in chaplet . NOSTOC, etc. 



4. Filaments flagelliform, 



slender RIVULARIA, etc. 



