GENERAL MORPHOLOGY AND PHYSIOLOGY. 123 



cells remain attached to each other, they form 

 a diplococcus. If these two cells again divide, and 

 the resulting- cells remain linked together, we get 

 a chain or rosary, or streptococcus (Figs. 47, 48, 49). 



FIG. 47. STREPTOCOCCUS AND FIG. 48. STREPTOCOCCUS IN THE 

 SARCINACOCCUS FROM A BLOOD OF A RABBIT, x 1200. 



DROP-CULTIVATION, x 1200. 



These chains may consist of a few four or five 

 individuals linked together, or of a far greater 

 number, in which case the chains are generally 

 curved or twisted. If the division occur in two 



FIG. 49. STREPTOCOCCUS OF PROGRESSIVE TISSUE NECROSIS IN MICE. 

 [After Koch.] 



directions, so that four cocci result, a tetrad or meris- 

 mopedia is formed. If the division occur in three 

 directions, one coccus divides into eight, and we 

 get a packet form or sarcinacoccus. Immediately 

 after division the daughter cells are not perfectly 



