APPEARANCE OF GROWTH ON CULTURE MEDIA 219 



Further, in the gelatin puncture the liquefaction which 

 occurs is frequently characteristic. It may be crateriform 

 (Fig. 145), a shallow saucer at the surface; or funnel-shaped 



I 

 I- 





Fig. 152 



Fig. 153 



Fig. 154 



Fig. 155 



Fig. 152.— Effuse slope culture. X §. 

 Fig. 153.— Rhizoid slope culture. X h 

 Fig. 154. — Rugose slope culture. X h 

 Fig. 155. — Verrucose slope culture. X ^. 



(Fig. 146); or it may be of uniform width all along the 

 puncture, i. e., saccate (Fig. 147) ; or it may be stratiform, 

 (Fig. 148), i. e., the liquefaction extends to the sides of the 

 tube and proceeds uniformly downward. 



