346 BACTERIOLOGY 



Gelatin colonies. A very slow growth, visible in 8 days. Deep colonies : 



gray — pale red, entire, becoming wine-red. The surface colonies 



develop- but little pigment. 

 Gelatin stab. In depth, wine-red colonies ; on the surface no color. Indol, a 



slight trace. 

 Agar slant and blood serum. Growth moist, glistening, grayish white, 



limited, wine-red where thicker. 

 Potato. Growth of small, deep-red colonies. 

 Bouillon. Slightly turbid, with a reddish sediment. HjS negative. No gas 



produced. 

 Habitat. Water. 



9. Spirillum rugula (Miiller) Winter 



Vibrio rugula Miiller : Cohn's Beitrage, I, 1875, 

 Spr.-rugula Winter : Die Pilze, 1884. 



Morphology. Bacilli 1.5-2.0:8-16 /x, rods curved, spiral, or in long chains. 



A bundle of polar flagella. Spores at ends of swollen rods ; according to 



Bonhoff, not present. 

 Gelatin colonies. At 20°-22° yellowish white, round, becoming liquefied. 

 Agar slant. . Growth at 37° white, somewhat rugose. 

 Potato. Growth at 37° white-yellowish, spreading, rugose. 

 Blood serum. Growth at 37° thin, white; medium liquefied. A penetrating 



faecal odor in cultures. 

 Habitat. Isolated from the mouth and putrefying fluids. 



10. Spirillum sputigenum Kruse 



Fliigge, Die Mikroorganismen, 1896, 594. 



Described but not named by Miller : Deutsche med. Wochenschrift, 1884, Nos. 34 and 48. 



Morphology. Bacilli curved rods, commas, and 5 fprms, also spiral filaments. 

 According to Lehmann-Neumann (Bak. Diag., 1896, 344), the flagella 

 are in bundles at one side of the end of a rod. Do not grow in the 

 ordinary culture media. 



Habitat. Isolated from tartar on teeth and from saliva. 



II. Spirillum jenense (Ehrenberg) Winter 



Ophidomonas Jenensis Ehrenberg: I.e. 

 Spr. jenense Winter : Die Pilze, 1884, 65. 



A large species of a dirty green red — brownish green color. Sulphur granules 

 in the plasma and at the poles. Flagella bundles of 3-9 elements, very 

 long and stout. The flat spirals are 40 long and 3.5 ;«. thick. 



