"Sr 



MORPHOLOGY. 



Fig. 1. 



'°ocs 



37 



<«](ID CD 



m 



® ofi, 



» 88 



® 



c d e 



a. Staphylococci. 5. Streptococci, e. Dlplococd. d. Tetrads, e. Sarcinae. 



* "i > . 



Fie. 2. 



~^-^ 



"•^-^2 









a. Bacilli in pairs. 6. Single l)acilli. c and d. Bacilli In threads, eand/. 

 Bacilli of variable morphology. 



Fig. 3. 



a b c d 



a and d. Spirilla in short segments and longer threads — ^the so-called 

 comma forms and spirals. 6. The forms known as spirochsete. c. The thick 

 spirals sometimes known as vibrios. 





— those growing in masses like clusters of grapes (see 

 Fig. 1, a) ; streptococci — those growing in chains con- 



3 



