SPECIES DESCRIBED BY VARIOUS WRITERS. 



chains, which develop very rapidly in nutrient 

 gelatine, speedily converting it into a turbid liquid. 

 They are the agents of lactic acid fermentation. 



2. Occurs in the form of cocci, rods, and fila- 

 ments, which develop slowly in nutrient gelatine. 

 The different forms may be observed in the 

 canaliculi of the dentine. 



3. Occurs as very small cocci, rarely in chains, 

 which rapidly liquefy nutrient gelatine. 



4. Occurs as cocci, which very slowly liquefy the 

 gelatine, the culture retaining for some time the ap- 

 pearance of a thread (vide Comma bacillus of the mouth). 



Micrococcus of saliva (Microbe de salive, Pas- 

 teur). A micrococcus has been cultivated from the 

 saliva of a child which had died of hydrophobia.* 

 The saliva produced a fatal result when injected 

 into rabbits. Micrococci have also been observed 

 in normal human saliva, which produced septicaemia 

 in rabbits. f The virulence of the child's saliva was, 

 therefore, probably independent of the poison of 

 rabies. Hydrophobia is, nevertheless, believed to 

 be due to a micro-organism, and researches in 

 connection with the virus are at the present time 

 exciting keen interest. 



Micrococcus of pyaemia in mice, Klein. J 

 Certain cocci which were present in pork broth 

 proved fatal to mice in about a week, producing 

 purulent inflammation and abscess in the lungs*- 



* Pasteur, Comptes Retidus, xlii. 



t Magnin and Sternberg, Bacteria. 1884. 



Klein, Micro-org. and Disease. 1885. 



