106 TAXONOMY 



Genus : Micrococcus (Hallier) Cohn. 



The cells are globular and do not possess any organs of loco- 

 motion. Cell division takes place in two planes at right angles. 

 If the cells remain attached together after cell division, 

 merismopedia plates are formed. The plates give the ap- 

 pearance of a regular flat mass of cells. No endospores have 

 been noted in this genus. 



Genus : Sarcina Goodsir. 



The cells are globular and do not possess any organs of loco- 

 motion. Cell division takes place in three planes, all perpen- 

 dicular and at right angles to each other. Its cells remain 

 attached after division, cube-like packets are formed. The 

 composition of the media sometimes prevents this typical 

 cube formation. 



Genus: Planococcus Migula. 



The cells are globular. Cell division takes place in two 

 planes at right angles similar to genus Micrococcus. The cells 

 of this genus are motile, possessing one or two long flagella. 

 No endospores are produced in this genus. 



Genus : Planosarcina Migula. 



The cells are globular. Cell division takes place in three 

 planes as in Sarcina. Cells are motile, having only one flagel- 

 lum on each. Cells usually remain united in twos and in tet- 

 rads and seldom form packets as Sarcina. 



