CLASSIFICATION OF THE BACTERIA. 67 
Cells cylindrical . BACTERIUM, Duj. 
2. Cells with phyco- 
chrome, larger : 
Cells spherical . . APHANOCAPSA, Nag. 
Cells cylindrical . APHANOTHECE, Nig. 
6. Intercellular substance 
formed of several mem- 
branes enclosed one with- 
in the other: 
Cells spherical . . GLasocapsa, Ke. 
Cells cylindrical . GL@OTHECE, Nig. 
C. Cells united in glairy fam- 
ilies of definite form: 
a. Families of a single layer 
of cells disposed in plates: 
1. Cells in fours form- 
ing a plane surface . MERISMOPEDIA, Meyen. 
2. Cells without regular 
arrangement, forming 
a curved surface : 
Cells spherical, fam- 
ilies with reticu- 
lated rupture. . CLATHROCYSTIS, Henfr. © 
Cells cylindrical, cu- 
neiform, families 
divided by con- 
striction . . . Ca@LOSPHa=RIUM, Nag. 
6. Families with several lay- 
ers of cells, united in spher- 
ical corpuscles: 
1. Number of cells de- 
termined : 
Cells spherical, col- 
orless, arranged 
infours . . . SARCINA, Goods. 
