FLUID MEDIA 271 



Saccate: Shape of an elongated sack, tubular cylin- 

 drical (Fig. 151, g). 



Infundibuliform : Shape of a funnel, conical (Fig. 



IS 1 **)- 



Napiform : Shape of a turnip (Fig. 151, /) . 



Fusiform : Outline of a parsnip, narrow at either end, 

 broadest below the surface (Fig. 151, k). 



Stratiform: Liquefaction extending to the walls of 

 the tube and downward horizontally (Fig. 151, /). 



(D) Character of the Liquefied Gelatine. 



1. Pellicle on surface. 



2. Uniformly turbid. 



3. Granular. 



4. Mainly clear, but containing flocculi. 



5. Deposit at apex of liquefied portion. 



(E) Production of Gas Bubbles. 



Shake Cultures. 



1. Presence or absence of liquefaction. 



2. Production of gas bubbles. 



3 . Bulk of growth at the surface aerobic. 



4. Bulk of growth in depths anaerobic. 



Fluid Media. 



1. Surface of the Liquid. 



Presence or absence of froth due to gas bubbles. 

 Presence or absence of pellicle formation. 

 Character of pellicle. 



2. Body of the Liquid. 



Uniformly turbid. 



Flocculi in suspension. 



Granules in suspension. 



Clear, with precipitate at bottom of tube. 



Colouration of fluid, presence or absence of. 



3. Precipitate. 



Character. 



