54 LABORATORY BACTERIOLOGY 



83. 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 . . . . i. COCCACE^E 

 II. Cells cylindrical, longer or shorter, and 

 only dividing in i 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. BACTERIACE.E 



2. Cells crooked, without sheath . .3. SPIRILLACE.E 



3. Cells inclosed in a sheath . . { 4 ' 



4. Cells destitute of a sheath, united 



into threads, motile by means of 



an undulating membrane . . .5. BEGGIATOACE^E 



1. GENERA BELONGING TO THE FAMILY COCCACE/E 



Cells without organs of motion. 



a. Division in i plane i. Streptococcus 



b. Division in 2 planes 2. Microdoccus 



c. Division in 3 planes 3. Sarcina 



Cells with organs of motion. 



a. Division in 2 planes . . . . . .4. Piano coccus 



b. Division in 3 planes 5. Planosarcina 



2. GENERA BELONGING TO THE FAMILY BACTERIACE^E 



Cells without organs of motion . . . . i . Bacterium 

 Cells with organs of motion (flagella). 



a. Flagella distributed over the whole 



body 2. Bacillus 



b. Flagella polar 3. Pseudonwnas 



3. GENERA BELONGING TO THE FAMILY SPIRILLACEyE 



Cells rigid, not snakelike or flexuous. 



a. Cells without organs of motion . . i. Spirosoma 



