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-flavescens 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 Fliigge 



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 Fliigge 



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. Bakteriologie, XXV, 1899, 67. 



Morphology. Cocci 0.6-1.0 /A, 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. 



