JY OK I'.ACTKK'IA 



19 



1<>. A Streptococcus 

 One of the organisms concerned in the souring 

 of milk 



continue to reproduce, a chain of cells will result, which 

 may consist of a feu- 

 cells or of many. If 

 the organism is a coc- 

 cus, the lenn xtrrptn- 

 cocc-us (chain coccus) 

 is applied : if a bacil- 

 lus, stn ptolxH' ill-us is 

 used. 



In the case of the 

 bacilli this is the only 

 cell aLi<rre<rate with 

 r;"julnrity of form 

 that can occur. It is 

 probable that the 

 cells in a chain are in- 

 closed in a Common Afu ' r Orla Jensen. 



sheath. Various other forms of aggregates are found 



among the cocci. It' 

 the planes of division 

 are always parallel and 

 the cells cohere, a chain 

 results, as noted above. 

 If the tendency is for 

 but two cells to cohere, 

 the term di])lococcus is 

 used. If the planes of 

 division have no definite 

 direction, the progeny 

 of a single cell will form 

 an irregular cell mass. 

 Such an organism is 

 called a staphylococcus, 



from its similarity to a bunch of grapes. Cocci may occur 



Fiji. 11. Bact. Anthracis 



Threads consisting of many cells charac 



terize this organism 



After Giinther. 



