THE CLASSIFICATION OF BACTERIA 43 



(i) Cells straight, rod-shaped, without 



sheath, non-motile, or motile by I , 1 



means of flagella 2. Bacteriaceae. f*-T~>^ 



(2) Cells crooked, without sheath . . 3. Spirillaceae. u 



(3) Cells enclosed in a sheath ... 4. Chlamydobacteriaceje 



(4) Cells destitute of a sheath, united 



into threads, motile by means of 



an undulating membrane . . .5. ^peggiatoaceas. 



GENERA 



I . Coccacece 4 ;j^ iCv, Lj n^c^v'^^-^ 



Cells without organs of motion. J^£^/fJQ\tn^ 



a. Division in i plane .._ . . .1. Streptococcus. (\ 



b. 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." 



b. Division in 3 planes 5. Planosarcina. 



2. BacteriacecE 



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

 Cells with organs of motion (flagella) . 



a. Flagella distributed over the whole ,, _ 



body 2. Bacillus. - (^ 



b. Flagella polar 3. Pseudomonas. ^ 



3. SpiriUacea I (ju^/,Zd^ a^.^-^-^ 



Cells rigid, not snakelike or flexuous. 



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



b. Cells with organs of motion 



(flagella). 



1. Cells with I, v^ry rarely 2-3 



polar flagella 2. Microspira. 



2. Cells with polar flagella, in r, 



tufts of from 5-20 . . .3. Spirillum. y^ 

 Cells flexuous 4- Spirochaeta. 



4. Chlamydobacteriacea """C 



Cell contents without granules of sulphur. 

 a. Cell threads unbranched. 



