226 The Differentiation of Bacteria 



A. Cells without flagella. 



1. Division in only one direction of space. Streptococcus 



(Billroth). 



2. Division in two directions of space. Micrococcus (Hallier). 



3. Division in three directions of space. Sarcina (Goodsir). 



B. Cells with flagella. 



1. Division in two directions of space. Planococcus (Migula). 



2. Division in three directions of space. Planosarcina 



(Migula). 



