Vegetable Physiology. 



4'J1 



tionships, earlier classifications, etc., and then proceeds to the descrip- 

 tion of the families and genera. The group Schizomycetes forms the 

 first section of the Schizophyta, and is divided into five families; Coc- 

 caceaa, Bacteriacese, Spirillacese, Chlamydobacteriacese and Beggiatoa- 

 cese, as follows : 

 I. Cells globose in a free state, not elongat- 

 ing in any direction before division into 

 1, 2 or 3 planes 

 II. Cells cylindrical, longer or shorter, only 

 dividing in one plane, and elongating 

 to twice the normal length before the 

 division. 



(1) Cells straight, rod-shaped, with- 



out a sheath, non-motile or mo- 

 tile by means of flagella 



(2) Cells crooked, without a sheath 



(3) Cells enclosed in a sheath 



(4) Cells destitute of a sheath, united 



into threads, motile by 

 of an undulating i 

 The genera recognized by Prof. Migula 

 (1) Coccacese 



Coccacese. 



2. Bacteriacese. 



3. Spirillacese. 



4. Chlamydobacteriacese. 



A. Cells ^ 



, one plane 



. Streptc 



c. Division in three planes 

 B. Cells with organs of motion 



a. Division in two planes 



b. Division in three planes 



(2) Bacteriacese 



A. Cells without organs of motion 



B. Cells with organs of motion (flagella) 



a. Flagella distributed over the whole 



b. Flagella polar 



(3) Spirillacese 



A. Cells rigid, not snake-like flexuous 



a. Cells without organs of motion 



b. Cells with organs of motion (fla- 

 gella) 



1. Cells with 1, very rarely 2 

 -3 polar flagella 



