39 



THE ORGANISM IS A BACILLUS. 



THE GELATINE IS LIQUEFIED. 



THE ORGANISM IS NON-MOTILE AND CHEOMOGENIC. 



THE COLONIES ARE RED. 



Bacillus prodigiosus, rod-like bacilli, 1'5 /* in length ; from amyloid 

 substances; forms the blood-red' stains sometimes seen on 

 potato or bread (bleeding bread) ; the length of the bacilli 

 hardly exceeds their breadth; by continuous culture in the 

 incubating oven the bacUlus ceases to form pigment — but the 

 function generally is restored by cultivation at ordinary 

 temperature. 



Bacillus mycoides roseus (SchoU), from soil ; resembles the anthrax 

 bacillus. 



Bacillus lactis erythrogenes. See p. 40. 



