METHOD OF DESCRIBING CULTURES 59 



Tuberculation (tubercle-like appearances at 

 edge). 



Edge: entire or smooth, wavy, with pointed 

 protuberances, serrate, dentate, lacer- 

 ate (as if torn), fringed, hairlike shoots, 

 curled. 

 b) Deep colonies. 



Shape. 



Color. 



Translucency. 



Granulation. 



III. Agar-slant-culture. 



Limitation: confinement to needle-track or 

 spreading. If spreading, in what shape ? 



Vigor: luxuriant or scant. 



Color: by transmitted and reflected light. 



Elevation or depression. Elevation more pro- 

 nounced at edges or in center. 



Translucency. 



Moistness. 



Smoothness. 



Luster. 



Coloration of medium. 



Pigment production. 



Odor. 



Gas-formation: in culture or in medium. 



IV. Stab-culture in plain agar. 



1. Surface-growth (describe hke surface-colonies.) 



2. Stab-growth. 

 Vigor. 

 Extent. 

 Color. 



