PATHOGENIC BACILLI ; GROUP C 



265 



is swollen up into a spherical or oval ball, many times 

 thicker than the typical element ; the number of these 

 enlarged elements is greater in later than in recent cultures, 

 and the largest of them often show a vacuole in their centre 

 or at one side. From these facts it is probable that these 

 enlarged elements are involution forms. 



ENZA Bacilli un tiil 



Magnifiud twice. 



Preparations made of the colonies grown on the surface 

 of the Agar or glycerine Agar show the bacilli exactly of the 

 same aspect and character as those grown in fluid media, 

 namely as threads or else as large clumps ; in these the bi- 

 polarly-stained bacilli are ^'ery typical, and such clumps 



