GROWTH ON DIFFERENT CULTURE MEDIA 



205 



Further, in the gelatin puncture the liquefaction which 

 occurs is frequently characteristic. It may be crateriform 

 (Fig. 146), a shallow saucer at the surface; or funnel-shaped 



Fig. 153 



Fig. 154 



Fig. 155 



Fig. 156 



Fig. 153. — Effuse slope culture. X 5. 

 Fig. 154. — Rhizoid slope culture. X J. 

 Fig. 155. — Rugose slope culture. X J. 

 Fig. 156. — Verrucose slope culture. X 5. 



(Fig. 147); or it may be of uniform width all along the 

 puncture, i. e., saccate (Fig. 148); or it may be stratiform, 

 (Fig. 149), i. e., the liquefaction extends to the sides of the 

 tube and proceeds uniformly downward, 



