CELL GROUPINGS 



53 



Since the coccus is spherical, transverse division may occur 

 in any direction, though in three planes only at right angles 

 to each other. Division might occur in one plane only as in 

 spirilla and bacilli, or in two planes only or in all three planes. 



Fig. 42.^Streptobaoillus grouping. 



Fig. 43. — Typical diploooccUs 

 grouping. Note that the Individual 

 cocci are flattened on the appos- 

 ing sides. 



As a matter of fact these three methods of division are 

 found among the cocci, but only one method for each par- 

 ticular kind of coccus. As a result there may be a variety 

 igs among the cocci. When division occurs in 



Fig. 44.- 



-Long streptococcus 

 grouping. 



Fig. 45. — Short streptococcus 

 grouping. 



one plane only, the possible groupings are the same as among 

 the spirilla or bacilli. The cocci may occur in groups of two — 

 diphcoccus grouping (Fig. 43), or in chains — streptococcus 

 grouping (Figs. 44 and 45) . When the grouping is in diplococci, 



