BACILLI 447 



BACILLUS SUBFLAVUS 



Authority. — Zimmermann, Die Bakterien unserer T/ink-und Nutzwasser, 

 insbesondere des Wassers der Chemnitzer Wasserleitung, Chemnitz, 1S90. 



"Where Found. — In the Chemnitz water supply. 



Microscopic Appearance. — Bacilli, -with rounded ends, about 0'77 fj. broad 

 and from 1-5 to 3-0 /j. long, consisting of several individuals hanging together. 

 Slow motility. 



Cultures.— 



Gelatine Plates. — Forms small yellowish white dots in the depth. On 

 reaching the surface the colony resembles a yellowish white shining drop, 

 which soon becomes a flat expansion with an irregular and lobular periphery. 

 Under a low power the surface appears lineally arranged in scales, and has a 

 mother-of-pearl iridescence which later becomes dirty pale yellow. No lique- 

 faction takes place. 



Gelatine Tubes.— Forms a delicate greyish yellow expansion round the 

 point of inoculation, the edge being finely serrated. 



Agab-agar. — Forms a pale yellow expansion, which later becomes darker 

 and gradually covers the whole surface. Later the colour inclines to light 

 chrome-yellow and yellow ochre. 



PoTATOEs.^Does not grow very abundantly, and produces a faint loamy 

 yellow colour. 



BACILLUS TEEMELLOIDES 



I LIQUEFIES GELATINE | 



Authority. — Schof-.elius. Quoted by Tils, * Bacteriologische Untersuchun- 

 gen der Freiburger Leitungswasser,' Zeitschrift /. Hygiene, vol. ix., 1890, 

 p. 316. 



Where Found. — In Freiburg water, by Tils. 



Microscopic Appearance.— Small bacillus about 0-75 to 1 ^ long and 0-25 /u 

 broad, with rounded ends. It is motile. 



Cultures.— 



Gelatine Plates. — Forms smootli-rimmed yellow dot colonies in the depth, 

 whilst on the surface it forms small yellow projections, which later extend on 

 all sides. Under a low power the rim is smooth, but irregularly lobular. The 

 colony consists of small isolated heaps of bacilli, which are gathered together in 

 aggregates. 



Gelatine Tubes. — Along the needle's path in the depth innumerable small 

 isolated colonies of a yellow or yellowish brown colour are gathered together. 

 On the surface a growth appears resembling a surface plate-colony, and after 

 from eight to ten days the colony gradually sinks and the gelatine becomes thick 

 and fluid. 



Agak-agae. — Forms a dry granular growth along the needle's path on the 

 surface. After several days it becomes surrounded with a slimy yellow and 

 shining periphery. 



Potatoes. — Produces ti coarsely granular, crumbly yellow protuberance. 

 After fourteen days the growth has sunk somewhat, and is surrounded with a 

 slimy periphery. 



Bemarks. — It is aerobic. 



