134 



A MANUAL OF BACTERIOLOGY 



Bacterium lineola. This microbe resembles B. 

 termo in form and movement, only it is much longer 

 and thicker than that microbe. Each cell measures 

 from 3 to 5 /A in length and 1*5 //, in breadth, and is 

 provided with two flagella, one at each end of the 

 cell. This microbe occurs singly, in pairs, in zoo- 



gloea, but never 

 in chains or ros- 

 aries. It is found 

 in well-water and 

 stagnant water, 

 where no distinct 

 putrefaction is go- 

 ing on ; it forms 

 pellicles on steril- 

 ised potatoes and 

 various infusions. 

 <^> " Bacterium allii. 

 During the year 

 1887 the author 1 

 discovered this 

 microbe in the 

 greenish slime of 

 diseased or putre- 

 fying onions and 

 allied plants. It measures from 5 to 7 //, in length and 

 2 /JL in breadth, and occurs singly, in pairs, and forms 

 zooglcea. It has been named Bacterium allii because 

 it was originally found on Allium cepa (the onion). 

 Bacterium allii grows tolerably well on nutrient 

 agar-agar, and produces a bright green pellicle on 



1 Proceedings of Royal Society of Edinburgh, vol. xv. p. 40. 



FIG. 34. BACTERIUM ALLII. 

 A, Growing on agar-agar. 



B, The microbe isolated. 



