THE CLASSIFICATION OF BACTERIA 53 
> Inoculate a tube of bouillon and one of slant agar (from cul- 
tures furnished) with each of the following genera of bacteria: 
(1) a streptococcus, (2) a micrococcus, (3) a sarcina. 
82. Migula’s classification of bacteria. 
FAMILIES 
I. Cells globose in a free state, not elon- 
gating in any direction before divi- 
sion into I, 2, or 3 planes. . . . 1, COCCACEH 
II. Cells cylindrical, longer or shorter, and 
only dividing in 1 plane, and elon- 
gating to twice the normal length 
before the division. 
1. Cells straight, rod-shaped, without 
sheath, nonmotile, or motile by 
means of flagella . 2. . . 2. BACTERIACEE 
* 2, Cells crooked, without sheath . 3. SPIRILLACEZ 
3. Cells inclosed in a sheath j 4: SEA DG EAC SE: 
RIACEZ 
4. Cells destitute of a sheath, united 
into threads, motile by means of 
an undulating membrane. 5. BEGGIATOACEE 
1. GENERA BELONGING TO THE FAMILY COCCACE/E 
Cells without organs of motion. 
a. Division in 1 plane . Oa 1. Streptocaccus 
4. Division in 2 planes. 2. Micrococcus 
c. Division in 3 planes . . . . 3. Sarcina 
Cells with organs of motion. ~ 
a. Division in 2 planes . . . . . . 4. Planococcus 
6. Division in 3 planes . . . . . . 5. Planosarcina 
2. GENERA BELONGING TO THE FAMILY BACTERIACEE 
Cells without organs of motion . . . . I. Bacterium 
Cells with organs of motion (flagella). 
a. Flagella distributed over the wholebody 2. Bacrilus 
4. Flagella polar... . . . 3, Pseudomonas 
