PLATE III. 



TIG. 



1. B. SUBTILIS. Surface colony in a gelatine-plate x 100; 



forty-eight hours growth at 22 J C. 



2. B. MEGATERIUM. Surface colony in a gelatine-plate 



x 100; forty-eight hours growth at 22 C. 



3. B. MYCOIDES. Surface colony in a gelatine- plate x 100; 



forty-eight hours growth at 22 C. 



4. B. MEGATERIUM. Surface colony in a gelatine-plate 



x 100; seventy-tw r o hours growth at 22 C. A later 

 stage than fig. 2. 



5. B. AUREUS. Surface colony in a gelatine-plate x 100; 



seventy-two hours growth at 22 C. The colony 

 has a golden-yellow colour. 



6. B. OCHRACEUS. Surface colony in a gelatine plate x 100; 



thirty-six hours growth at 22 C. Liquefaction is 

 just commencing. 



7. B. LIQUEFACIENS. A young colony in a gelatine-plate 



x 100. Liquefaction has not commenced. 



8. B. Fuscus. Surface colony in a gelatine-plate x 100. 



The colony has a dark brown colour in the centre 

 and a thin filmy margin. 



