140 



BACTERIA 



detected. The whole of the protoplasm stains strongly 

 with the ordinary nuclear stains, and it is likely that 

 what corresponds with the chromatin of the ordinary 



iU 



^^ 





f 



B 



. V '^ 



^ 



S.Q 





G ^^ 



Fig. 15. — Various forms of Bacteria, x 1,000. A, Staphylococci 

 (groups) and Streptococci (curved chains) from pus (the large 

 spherical body is a pus corpuscle). B, Niirosomonas, a nitrifying 

 bacterium from soil, with single flagellum. C, Bacillus typhosus 

 (typhoid), showing flagella. D. Bacillus anthracis (anthrax), 

 showing spores (one in the centre of each cell). E, Bacillus 

 tetani (tetanus). Note the spherical spore at one end of and 

 much broader than the cell. F, Cholera spirillum, with a flagellum 

 at each end of the cell. G, Spirochcete pallida (syphilis spirillum). 

 After Muir and Ritchie. 



cell nucleus exists in the bacterial cell equally distri- 

 buted through the cytoplasm. The protoplasm is 

 surrounded by a membrane of gel structure (as is always 



