bacterium: aqile. 265 



gelatin colonies resemble those of B. coli; then there soon 

 occurs a liquefaction of the surrounding medium and the 

 growth breaks up into a crumbl)' mass. In the gelatin 

 stab there is marked liquefaction, at first funnel-shaped, 

 then cylindric. The content of the funnel is very cloudy, 

 and there is a delicate pellicle on top. Rather marked 

 little hairs, directed downward, which grow out into the 

 solid gelatin about the funnel of liquefaction are quite 

 remarkable. 



Bouillon very cloudy, with a delicate pellicle. Abundant 

 HjSi and little indol are produced. Upon agar and potato 

 the growth is nearly the same as that of the B. coli; the 

 potato culture has a very putrid odor. Grape-sugar is 

 fermented, with abundant gas-formation, and milk is not 

 coagulated. 



Determined to be the cause of a dysentery in calves in 

 Silesia and given to us by Weissenberg. 



The four following are closely related to, perhaps identical with, 

 the described ' ' liquefying varieties of B. coli, ' ' and are known to lis 

 through the descriptions only: 



Bacterium foetidum liquefaciens. (Tavel.) L. and N. 



From one to three short flagella extending out from an unstained 

 capsule (von Stocklin, Eecherchea sur la groupe des Coli-Bacillus, 

 1894). 



Gelatin in stab is liquefied, and has a strong fecal odor. Sugar is 

 fermented, with liberation of a vast amount of gas. Milk is not coagu- 

 lated. Bouillon becomes turbid and a pellicle develops upon the sur- 

 face. 



Bacterium cloacEe. (E. O. Jordan.) Lehm. and Neum. 



(Compare Th. Smith, " The Fermentation Tube, " 1893, 215. ) Sur- 

 face growth in gelatin is thin, with a somewhat irregular outline. 

 Abundant, uncharacteristic, yellowish-white growth on potato. Ac- 

 tively motile. Very abundant and rapid formation of gas from dex- 

 trose and saccharose, the closed end of the fermentation tube contain- 

 ing from 50% to 95% (about one- third Hand two-thirds CO,). Gas 

 is produced more slowly from lactose. Milk is coagulated in eight 

 days. 



Bacterium agile (Schou, Fliigge). Lehm. and Neum. 



Synonym. — Bacillus pneumonicus agilis Fliigge. 



