68 MORPHOLOGY OF THE BACTERIA. 
Cells cylindrical, cu- 
neiform, with phy- 
cochrome, with- 
out regular ar- 
rangement . . GOMPHOSPHZRIA, Kg. 
2. Number of cells very 
great and indetermi- 
nate: 
Cells colorless, very 
small: -‘.\..: .+." Ascococeus, Bille: 
Cells colored by ) Potycystis, Kg. 
phycochrome CoccocHLorIs, Spr. 
and larger. . ) Ponycoccus, Kg. 
TRIBE 2.—NEMATOGENES. 
Cells disposed in filaments. 
A. Filaments not branched: 
a. Filaments free or inter- 
laced. 
1. Filaments cylindrical, 
colorless, articulations 
not very distinct: 
Filaments very slen- 
der, short ~. .., BACILLUS, Cohn: 
Filaments very fine, 
lone... 4. ek, JUEPTOTHELX, Ke. 
Filaments larger, 
long. >). © BEGGIATOA, ‘Trev. 
2. Filamentscylindrical, 
with phycochrome, 
articles well defined, 
without cellular re- 
production. . . 
HyYPHEOTHRIX, Kg. 
OSCILLARIA, Bose. 
