2O2 BACTERIOLOGY. 



than those of Bacillus mbtilis. They are provided 

 with a flagellum at both ends, and exhibit charac- 

 teristic trembling and rotatory movements. Spores 

 thicker than the bacillus, and often placed laterally. 

 They were observed on rotting plant infusions, 

 forming a thick slimy skin. 



Bacillus of jequirity, Sattler. Rods 24-5 P- 

 long, and '58 ^ thick. They can be cultivated on 

 nutrient gelatine and blood serum. Infusion of je- 

 quirity containing the bacilli, or an artificial cultiva- 

 tion of the bacilli, inoculated into the conjunctiva 

 of healthy rabbits produces severe ophthalmia. The 

 poisonous principle is, however, believed to be a 

 chemical ferment, abrin, and not the bacillus. Boiling, 

 which does not destroy the spores of the bacillus, de- 

 stroys the ferment, and cultivations started with 

 these spores, though teeming with jequirity bacilli, 

 are quite harmless.* The bacilli occur in infusions 

 of the beans of Abrus precatorius, or jequirity. 



Bacillus of potatoes, Koch. Rods, very 

 frequently in the form of a delicate, wrinkled veil, 

 which later has a brown reticulated appearance. 

 They frequently occur on potatoes which have been 

 prepared as a culture medium, but have not been 

 thoroughly sterilised. 



Bacillus fluorescens. Rods which cultivated 

 on nutrient agar-agar form a white layer, and colour 

 the medium an emerald green (Plate VIII. , Fig. 3). 



Bacillus figurans. In plate-cultivations ex- 



* Klein, Micro-org. and Disease. 1885. 



