SYSTEMATIC AND DESCRIPTIVE. 301 



Fig. i), and in plate-cultivations characteristic, 

 thread-like, branching, or star-like colonies are 

 formed (Plate XXVL, Fig. 2). Inoculated into 

 mice and rabbits, a fatal result is produced ; but 

 experiments with pigs were unsuccessful. Pigeons 

 were also susceptible, and the bacilli were detected 

 in their blood (Plate XXVL, Fig. 3). 



Bacillus in tetanus, Nicolaier. Rods, some- 

 what longer but scarcely thicker than the bacillus 

 of mouse-septicsemia. Occasionally thread-forms 

 result, but they are collected mostly in irregular 

 masses. They exhibit a characteristic spore-for- 

 mation. They were found associated with other 

 bacteria in abscesses resulting from the inoculation 

 of mice and rabbits with garden earth. Inoculation 

 of earth subcutaneously in these animals induces 

 fatal tetanus. A cultivation of the mixture of 

 micro-organisms on blood serum also produced 

 the same disease. Bacilli stated to be identical 

 with the bacilli of earth-tetanus have been ob- 

 served in a case of tetanus in man. Further 

 researches are required to establish their patho- 

 genic properties. 



Bacillus alvei, Cheshire and Cheyne.* Rods 

 varying in size, and forming large oval spores. 

 When cultivated in nutrient gelatine in test-tubes 

 a delicate, ramifying growth appears on the sur- 

 face, and irregular whitish masses arise along the 



* Cheshire and Cheyne, Journ. Royal Microscopical Society, 

 1885, pp. 582-601. 



