BACILLUS FLUORESCENS LIQUEPACIENS 445 



■well-defined depression is formed. The whole of the 

 gelatine then very soon assumes a green fluorescence. 



Gelatine Tubes. — In the depth is a whitish growth, while 

 at the surface a funnel-shaped depression forms, and 

 finally the whole contents of the tube become liquefied and 

 of a fluorescent green colour, whilst a thick white deposit 

 is formed. 



Potatoes. — A brownish expansion is formed. 



Bacillus Fluorescens Non-Liquefaciens. — This organism is 

 found in water. It forms short fine bacilli with rounded 

 ends. It is strictly aerobic, and is not motile. Cultural 

 characters : 



Gelatine Plates. — The surface-colonies have a fern-like 

 appearance, with a mother-of-pearl-like opalescence. No 

 liquefaction of the gelatine takes place. 



Gelatine Streak. — Produces a fluorescent film. 



Agar-Agar. — Forms a greenish expansion. 



Potatoes. — A brownish growth is rapidly formed. 



Bacillus Gasoformans. — This organism is found in water. 

 It forms small, very motile bacilli. It does not grow at 

 the higher temperature. Cultural characters : 



Gelatine Plates. — Forms very rapidly cup-like liquefied 

 depressions. 



Gelatine Tubes. — The gelatine is rapidly liquefied. In 

 shake-cultures much gas is formed. 



Potatoes. — Grows rapidly, producing a dark yellow, slimy 

 expansion, which afterwards becomes reddish-brown. 



Bacillus Jacinthus. — See under B. violaceous. 



Magenta Bacillus. — This organism is a very short rod, 

 which gives rise to a characteristic pigment. It is found 

 in water. Cultural characters : 



Gelatine Streak. — Forms a streak of a brilliant carmine 



