86 BACTERIOLOGY 



Gelatin stab. A scanty growth along line of stab ; a flat, milky-white growth 



on the surface. 

 Agar slant. A milk-white growth. 

 Habitat. Water. 



31. M. eczemae 



Diplococcus albicans-tardus Unna : Tomasoli, Monatsch, prakt. Dermatol, IX, 1889, 54. 



Morphology. Oval diplococci, often in short chains or irregular groups. 

 Gelatin colonies. Deep : oval, dark yellow. Surface : round, elevated, 



grayish yellow ; in 8 days 2 mm. Microscopically granular, grayish 



yellow. 

 Gelatin stab. Scanty growth in depth ; on the surface growth thin, waxy, 



yellowish white. 

 Agar slant. A yellowish gray, dull streak. 

 Habitat. Upon the surface of the body in eczema. 



32. M. Sornthalii Adametz 



Centralblatt f. Bakteriologie, 2d. abt., 1895, 465. 



Morphology. Cocci round-oval, 0.7 /u, ; in twos, fours, clumps, and short chains 

 of 6-8 elements. 



Gelatin colonies. Surface: white, flat, slimy, in 8-10 days, 4-5 mm. ; micro- 

 scopically, dirty — yellowish white, concentric ; centre brownish opaque ; 

 border thin erose. 



Lactose gelatin stab. A beaded growth in depth ; on surface growth dirty- 

 yellowish white, slimy. 



Milk. Coagulated, acid ; gas. 



H I 

 Lactose bouillon. Gas t^tt- = -• 

 CO2 3 



Habitat. Milk, cheese. 



33. M. concentricus Zimmerman 



Bak. Trink u. Nutzwasser, Chemnitz, 1890. 



Morphology. Cocci 0.9 ;«,; in irregular clumps. 



Gelatin colonies. Deep : round, light brown — grayish yellow, granular, con- 

 centrically zoned. Surface: small, bluish gray disks, becoming larger 

 and more irregular, with lobate periphery. Microscopically, a grayish 

 brown irregular-edged and lobate centre, with a lighter granular ring and 

 a whitish glistening border. 



