THE CLASSIFICATION OF BACTERIA 113 



Potato. Growth raised, glistening, limited; surface rough, sulphur chrome 



yellow. 

 Glucose bouillon. Some acid. Indol slight. H 2 S produced. 

 Habitat. Common in the air. 



10. Sarc. aurantiaca FlUgge 



Lindner : Die Sarcina Organismen des Garungsgewerbes, Berlin, 1887. 



Morphology. Beautiful packets on all media. 



Gelatin colonies. Small round punctiform, which soon sink in the liquefied 



gelatin ; microscopically, round, entire, bright dark yellow, amorphous 



or finely granular. Later a central lobate lacerate colony, granular, 



within a funnel of liquefied gelatin. 

 Gelatin stab. In 36 hours colony on the surface sunken in the liquefied 



gelatin, becoming a funnel of liquefied gelatin, with a granular sediment. 

 Agar colonies. Roundish, entire, moist, glistening, slightly raised, orange. 



Microscopically, irregular roundish; centre greenish brown; border 



brighter and more yellow. 

 Agar slant. Slightly raised, orange-yellow orange-red, buttery consistency. 

 Bouillon. A flocculent turbidity with much sediment. 

 Milk. Coagulated and peptonized. 

 Potato. Growth yellow-orange, glistening, becoming raised, red-orange, dull, 



granular. 

 Glucose bouillon. Acid production slight. H 2 S negative. Indol slight. 

 Habitat. Abundant in the air. 

 Varieties. 



Indt. from the preceding. Sarc. aurea Mace\ Sarc. aurescens Gruber. 



11. Sarc. cervina Stubenrath 



Lehmann-Neumann, Bak. Diag., 1896. 



Gelatin colonies. Whitish, becoming bright brown, moist ; slowly surrounded 

 by a zone of liquefied gelatin ; microscopically, coarsely granular, erose. 



Gelatin stab. In depth, growth filiform beaded ; on the surface, colony 

 small, bright brown, becoming slowly sunken in the liquefied gelatin. 



Agar colonies. Like gelatin colonies. 



Potato. Growth brownish white. 



Habitat. From stomach contents in carcinoma. 



