THE CLASSIFICATION OF BACTERIA 95 



Gelatin stab. The growth in depth is beset with echinulate-acicular exten- 

 sions ; on surface, growth slimy, with radiating acicular outgrowths. 

 Potato. Growth yellowish white, with lobular offshoots. 

 Habitat. Water. 



57. M. viridis (Guttmann) 



Staphlococcus viridis-jiavesceTis Guttmann : Virchow's Archiv, CVI, 1887, 259, 



Morphology. Cocci of irregular sizes, solitary, in pairs and clumps. 

 Gelatin colonies. Both deep and surface colonies grayish yellow. 

 Agar stab. At 37° C, 24 hours, growth grayish yellow. 

 Potato. Growth at 37° C. abundant. 

 Habitat. Water (?). 



58. M. versicolor Flugge 



Die Mikroorganismen, 1886, 177. 



Morphology. Cocci in twos and clumps. 



Gelatin colonies. Deep : round, entire, yellowish gray, opaque, granular, i mm. 

 Surface: in 4 days 10 mm., irregular — quadrangular — lobed, slimy, glis- 

 tening, yellowish gray, iridescent, often punctiform in centre. 



Gelatin stab. In depth, yellowish, beaded ; on the surface, like gelatin col- 

 onies. 



Habitat. Air. 



59. M. tardigradus Flugge 



Die Mikroorganismen, 1886, 175. 



Morphology. Cocci large, round, in clumps, with often darker poles. 



Gelatin colonies. Deep: round-oval, entire, dark olive-green, 0.4-0.6 mm. 

 Surface: slightly elevated, smooth, glistening, 0.5-1.0 mm.; micro- 

 scopically, grayish yellow, lighter toward the periphery. 



Gelatin stab. In depth, after 6-8 days, a beaded growth, composed of yel- 

 lowish colonies. 



Habitat. Air. 



60. M. Jongii 



staphlococcus pyogenes bovis Jong : Centralblatt f. Bakterjologie, XXV, 1899, 67. 



Morphology. Cocci 0.6-1.0 /x, variable in size, singly, and in clumps. Stain 



with ordinary colors. Stain by Gram's method. 

 Gelatin colonies. In 24-48 hours, minute, round-oval, whitish yellow to yellow ; 



microscopically, light — dark brown. 

 Gelatin slant. Yellow round colonies, or a yellow layer. 

 Gelatin stab. In depth, white — yellowish white round-oval colonies ; on the 



surface, a minute golden yellow growth. 



