48 GENERAL SYSTEMATIC BACTERIOLOGY 



Bemhard Fischer (1894) gave the generic name Halihacterium to 

 nonphosphorescent bacteria from salt water. 



The most important contribution of 1894 was the appearance of the 

 second Migula classification. In practically identical outline but with 

 some elaboration of subgenera this classification appeared the next year 

 (1895) under the heading of Schizomycetes in Engler and Prantl's Pflan- 

 zenfamilien. A key to the families and genera of bacteria as recognized 

 by Migula is as follows : 



Key to the Families of Bacteria. Migula (1894) 



I. Cells in free state spherical, not lengthening before division. 

 Cell division in one, two, or three directions of space. 



Family I. Coccaceae 

 II. Cells short or long cylindric, divide only transversely, and before division 

 extending to double length: 



a. Cells straight, rod shaped, without sheath, non-motile or motile by 



means of flagella Family II. Bacteriaceae 



b. Cells bent, without sheath. 



Family III. Spirillaceae 



c. Cells surrounded by a sheath. 



Family IV. Chlamydobacteriaceae 



d. Cells united into a filament, without sheath, motile by means of an 



undulating membrane . . Family V. Beggiatoaceae ■ 



Key to Genera of the Coccaceae 



I. Cells without organs of motion: 



a. Division in one direction of space Streptococcus Billr. 



b. Division in two directions of space Micrococcus (Hall) Cohn 



c. Division in three directions of space. . . .Sarcina Goodsir 

 II. Cells with organs of motion: 



a. Division in two directions of space Planococcus Migula 



b. Division in three directions of space Planosarcina Migula 



Key to the Genera of Bacteriaceae 



I. Cells without organs of motion Bacterium Ehr. emend. 



II. Cells with flagella: 



a. Flagella over entire cell body Bacillus Cohn emend, 



b. Flagella polar Pseudomonas Migula 



Key to the Genera of the Spirillaceae 



I. Cells stiff, not bending like a snake: 



a. Cells non-motile Spirosoma Migula 



