I'.INARY FISSION 



87 



loosely attached, forming chains. These are very common 

 in some species of micrococcus (see Fig. 1 6). 



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 







-MG. 1 8. A, Vibrio. B, Spirillum temic. c, Spirillum volutaus. 

 (From Klein.) 



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 



