BACTERIUM AGILE. 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 crumbly 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 

 H 2 S 1 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 us 

 through the descriptions only: 



Bacterium foetid um liquefaciens. (Tavel.) L. and N. 



From one to three short flagella extending out from an unstained 

 capsule (von Stocklin, Recherches 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 cloacae. (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 C0 2 ). Gas 

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

 days. 



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



Synonym. — Bacillus pneumonicus agilis Flugge. 



