Bariiek: Dysentkky Bacilli.] IPiiil. Journ. Sci., VIII. R, No. 6. 



Fig. 1. Parent culture of Bacillus dysenteriae, Shiga-Kruse type, strain No. 42. 



Fig. 2. A new race grown from a single cell isolated from the culture shown in fig. 1. 



PLATE I. 



