BACTERIA LESS. 



loosely attached, forming chains. These are very common 

 in some species of Micrococcus (See Fig. 15). 



Bacillus when undergoing fission behaves something like 

 Heteromita : the mother-cell divides transversely across the 

 middle, and the two halves gradually wriggle away from one 

 another, but remain connected for a time by a very fine thread 



B 



FIG. 17. A, Vibrio. 

 (From Klein.) 



B, Spirillum tenue. c, Spirillum volutans. 



of protoplasm which extends between their adjacent ends. 

 This is drawn out by the gradual separation of the two cells, 

 until it attains twice the length of a flagellum, when it snaps 

 in the middle, thus providing each daughter-cell with a new 

 flagellum. Bacillus may, however, divide while in the 

 resting condition and, under certain circumstances, the 

 process is repeated again and again, and the daughter-cells, 



