78 BACTERIOLOGY 



ii. M. liquefaciens v. Besser 



M. albus-liquefaciens v. Besser: Beitrage path. Anat., VI, 1889, 46. 



Morphology. Cocci round-elliptical; in twos, clumps, and chains. Facul- 

 tative anaerobic. 



Gelatin stab. A saccate liquefaction. 



Agar colonies. Elevated, glistening, 0.5 mm. Microscopically, the colonies 

 show a brownish centre, with an outer concentric zoning. 



Potato. Growth white, glistening. 



Habitat. Isolated from normal nasal mucus. 



12. M. simplex Wright 



Memoirs National Academy of Sciences (U. S. A.), VII, 1895, 32. 



Morphology. Cocci medium-sized ; in pairs, tetrads, and clumps. 



Gelatin colonies. Deep colonies: dark brownish, granular; entire irregular 

 margins. Surface colonies : in 3 days round, glistening, white, trans- 

 lucent, i.o mm. Microscopically, dense-opaque, granular ; later immersed 

 in a clear liquid and somewhat fragmented. 



Gelatin stab. In depth a filiform growth ; on the surface liquefaction crateri- 

 form, becoming stratiform. Gelatin rendered alkaline. 



Agar slant. Growth milk-white, glistening, limited. 



Bouillon. Turbid, alkaline, with flocculi on the surface and a white flaky 

 sediment. 



Potato. Growth feeble, composed of whitish discrete colonies. 



Litmus milk. In 2 weeks viscid ; pink above, decolorized below, becoming 

 coagulated and acid. 



Pepton-rosolic acid solution. Unchanged. Indol? No nitrites. Grow at 36 C. 



Habitat. Water. 



13. M. acidi-lactis Kriiger. 



Centralblatt f. Bakteriologie, VII, 1890, 495. 



Morphology. Cocci oval, 1.0-1.5 AM i* 1 twos an d tetrads. Facultative 



anaerobic. 



Gelatin colonies. Round, white, border lacerate. 

 Gelatin stab. In depth growth beaded ; on the surface growth round, white, 



becoming sunken in the liquefied gelatin. 

 Milk. Coagulated, becoming slimy, peptonized, and has a pasty odor. Lactic 



acid produced. 

 Habitat. Isolated from cheesy butter. 



