SOME LACTOSE FERMENTING BACTERIA 621 



I. Non-motile; gelatin rarely liquefied; indol, dulcitol and inulin negative 

 or positive; sucrose, raffinose, mannitol, glycerol, salicin, dextrin, and 

 starch positive. 



7. B. aerogenes. 



II. Motile; gelatin liquefied (often very slowly); indol, dulcitol, glycerol, 

 inulin and starch usually negative (rarely positive) ; dextrin occasion- 

 ally positive; sucrose, raflfinose, salicin, and mannitol positive (rarely 

 negative) . 



8. B. cloacae. 



