PLATE XXVI. 

 FIG. 1. STAPHYLOCOCCUS PYOGENES AUREUS. 



From the edge of a growing culture on agar. 



Carbol fuchsin, washed in acidulated water. The cocci occur in clusters or 

 botryoidal groups (2ra<J>vA?- bunch of grapes), here and there in short chains, 

 twos, or singly. The individuals in the groups vary in size, indicating probably 

 differences in age ; in some of the groups the process of division appears in a 

 diplococcus with flattened sides, the elements of which have not yet parted and 

 become spherical. 



FIG. 3 PLAGUE BACILLUS. 



Agar culture, incubated 37 C.; the advancing edge of a three days' growth. 



Carbol fuchsin, washed in acidulated water. Short rods, mostly of oval form, 

 often in pairs, side by side. Here and there slightly curved, longer forms occur, 

 some of remarkable thickness. 



The original source of the bacillus was a Lascar admitted into the Seamen's 

 Hospital, Albert Dock, from a P. and O. steamer arriving from Bombay; the 

 bacteriological diagnosis was made by Dr. R. T. Hewlett; inoculations carried 

 out upon guinea pigs caused d^ath with typical symptoms. 



The forms examined in the blood of animals experimentally inoculated with 

 this particular bacillus showed marked "end-staining"; this is entirely absent 

 in the specimen prepared from the agar culture. 



