94 BACTERIOLOGY 



Agar slant. Growth yellowish white, glistening, granulated. 

 Potato. Growth raised, creamy. 

 Habitat. Water. 



CLASS VI. DOUBTFULLY CHROMOGENIC, i.e. GROWTH ON GELA- 

 TIN OR AGAR LIGHT YELLOW OR YELLOWISH WHITE. GEL- 

 ATIN NOT LIQUEFIED. 



I. Cocci very large, 1.5-2.0 microns in diameter. 



55. M. citreus Sternberg. 

 II. Cocci smaller than the preceding. 



A. Growth in gelatin stab beset with radiate acicular extensions. 



56. M. plumosus Brautigam. 



B. Gelatin stab cultures not as above specified. 



1. Grow well in nutrient gelatin. 



57. M. •viridis (Guttmann). 



2. Growth in gelatin slight, colonies very small. 



58. M. versicolor Fliigge. 



59. M. tardigradus FlUgge. 



60. M. Jongii. 



3. No growth in gelatin. 



6i . M. subflavus v. Besser. 



55. M. citreus Sternberg 



Cremfarbiger micrococcus List ; Adametz, Bak. Nutz u. Trinkwasser, 1888. 

 M. citreus Sternberg : Manual of Bacteriology, 1892, 599. 



Morphology. Cocci very large, round, 1.5-2.2, occur singly, as diplococci, or 

 as chains of 8 or more elements. 



Gelatin colonies. Elevated, irregular, moist, glistening, dirty yellow — cream- 

 colored. 



Gelatin stab. Only a slight growth in depth. 



Agar slant. Growth light yellow. 



Potato. At 37°, a yellowish growth. 



Habitat. Water. 



56. M. plumosus Brautigam 



Adametz, Bak. Nutz u. Trinkwasser, 1888. 



Morphology. Cocci round, 0.8 /a, forming zoogloea. 

 Gelatin colonies. Raised, lobed, yellowish white. 



