BACILLI 445 



BACILLUS OCHRACEUS 



LIQUEFIES GELATINE 



Authority. Zimmermann, Die Bakterien unserer Trink- und Nutzwasser, 

 insbcsondere des Wassers der Chemnitzer Wasserleitiing, Chemnitz, 1890. 



"Where Found. In the Chemnitz water supply. This bacillus was isolated 

 and described previously by Fazio, I Micrvbi dalle Acque minerali, Napoli, 

 1888. 



Microscopic Appearance. Bacillus from 0-65 to 0-75 /u broad, and 1-25 to 4-5 /u. 

 long, with rounded ends. It occurs in pairs also, forming longer threads. In 

 stained preparations it sometimes appears to be enveloped in a capsule. Slow 

 snake-like movement. 



Cultures. 



GELATINE PLATES. Forms in the depth small pale yellow ball-shaped colo- 

 nies ; the gelatine above becomes liquid and the colony rests finally in a cup- 

 shaped depression. The colour becomes more intense, and is of a golden 

 yellow ochre. Under a low power they appear as granular and brownish 

 yellow discs, covered later with small wart-like protuberances. 



GELATINE TUBES. Forms a funnel-shaped depression, but when the lique- 

 faction has extended right across the tube it proceeds more slowly. A pale 

 yellow precipitate collects, which later becomes yellow ochre in colour, and 

 when shaken renders the liquid cloudy and of a pale yellow ochre colour. 



AGAE-AGAE. Forms a somewhat restricted yellow ochre expansion. 



POTATOES. Forms a thin yellow ochre expansion. 



'LEMON-YELLOW BACILLUS' 



LIQUEFIES GELATINE 



Authority. Maschek, Die Bakterien der Nntz- und Trinkwcisser, Adametz, 

 Vienna, 1888. 



Where Found. In water. 



Microscopic Appearance. --Short bacillus. Lively pendular movements. 



Cultures. 



GELATINE PLATES. Forms circular yellowish white colonies ; the centre is 

 light brown, with radial extensions towards the periphery. 



GELATINE TUBES. Forms a nail-head growth of a yellow colour. The 

 gelatine is liquefied and assumes a lemon-yellow colour. 



AGAR-AGAE. Forms a lemon-yellow surface expansion. 



POTATOES. Forms a lemon-yellow expansion. 



'OKANGE-KED WATER BACILLUS ' 



Authority. Adametz -Wichmann, Die Bakteriender Nutz- und Trinkwasser, 

 Vienna, 1888. 



Where Found. In water. 



Microscopic Appearance. Long, very thin bacillus. It is not motile. 



Cultures. 



GELATINE PLATES. Grows very slowly, forming orange red centres. Under 

 a low power they are finely granular, brown in colour, and either round or oval. 

 The depth colonies appear to be colourless. 



GELATINE TUBES. Grows slowly on the surface, forming a slimy moist shin- 

 ing expansion of an orange red colour. No liquefaction takes place. 



Remarks. As far as the above description goes, it resembles the B. aurantiaciis, 

 p. 449, but the microscopic appearance does not correspond. 



