SPIRILLA RESEMBLING CHOLERA. 



437 



must frequently be made before the growth of a single 

 colony can be observed. To the naked eye the colonies 



*<S£> 



Fig. 92. — Spirillum of Finkler and Prior, from an agar-agar culture ; x 1000 

 (Itzerott and Niemann). 



appear as small white points in the depths of the gelatin 

 (Fig. 93). They, however, rapidly reach the surface, 



Fig. 93. — Spirillum of Finkler and Prior: colony twenty-four hours old, as 

 seen upon a gelatin plate; x 100 (Frankel and Pfeiffer). 



begin liquefaction of the gelatin, and by the second 



