THE REPRODUCTION OF MICROBES 



109 



those that are produced only by fission, and those 

 that multiply by fission and spores : 



Concerning the reproduction of the micrococci, if 

 the division takes place in one direction only, the 

 resulting form (if the two cells remain together) is 

 a diplococcus, dumb-bell, or colon (:). The diplo- 

 coccus may again divide, without separation, form- 

 ing a streptococcus or chain, which may become 

 curved or even twisted in appearance. Sometimes 

 the division of these microbes is in two directions, 

 resulting in four cocci (::), which is termed a meris- 

 mopedia, or in three directions forming a sarcina- 

 coccus or sarcina. 1 



All microbes require for their nutrition and growth 



1 A division into a large and an indefinite number of cells is 

 termed an ascococcus. 



