MIGROCOCCI -499 



MICKOCOCCUS CITKEUS (List) 



Authority. Adametz, Die Bakterien der Nidz- und Trinkwasser, Vienna, 

 1888. 



Where Found. In water. 



Microscopic Appearance. Very large and perfectly round cocci from 1*5 to 

 2-2 ju in diameter. Occurs singly, also arranged as diplococci, or in chains of 

 8 or more cocci. Not motile. 



Cultures. 



GELATINE PLATES. Forms dirty yellow cream-coloured colonies which project 

 above the level of the gelatine. They are moist and shining, and usually of 

 irregular contour. No liquefaction takes place. 



GELATINE TUBES. Grows very slightly in the path of the needle in the depth. 



AGAB-AGAB. Forms a light yellow expansion. 



POTATOES. Forms an abundant yellow growth at 37*5 C. 



MICROCOCCUS LUTEUS 



Authority. Schroeter, Beitrage zur Biologie der Pflanzen, vol. i., Heft ii., 

 1870; also Cohn, loc. ciL, p. 153. See also Adametz, Die Bakterien der Nutz- 

 iind Trinkwasser, Vienna, 1888. , 



Where Found. In air and water. 



Microscopic Appearance. Elliptically shaped cocci, 1 to 1-2 /* in diameter. 

 Forms zoogloea, the intercellular substance of which is easily soluble in water. 

 Not motile. 



Cultures. 



GELATINE PLATES. Forms raised sulphur-yellow colonies, with an irregular 

 contour. Under a low power they are slightly granular. No liquefaction 

 takes place. 



GELATINE TUBES. Forms a yellow expansion on the surface, which later 

 becomes wrinkled, whilst along the needle's path in the depth a granulated 

 growth is visible. 



AGAB-AGAB. Produces a slimy yellow expansion. 



POTATOES. Forms an intensely yellow expansion, irregular in contour, and 

 which later becomes wrinkled. 



Remarks. The pigment is insoluble in water, alcohol, and ether. 



