Fig. 41. 

 Stained impression of an atypical colony — filamentous bacilli. x 800. 



Fig. 42. 



Impression of a number of young colonies of B. pestis on the surface of 

 gelatine. x 80. One of these colonies was shown in Fig. 40 more 

 magnified. Near the lower right margin and isolated the atypical colony 

 shown in Fig. 41. 



