GELATINE STAB CULTURES 269 



2. Colonies Confluent: Surface elevation and char- 

 acter of edge, as for plate cultivations (vide page 263). 

 Chromogenicity : As for plate cultures. 



Gelatine Stab Cultures. 



(A) Surface Growth. As for individual colonies in 

 plate cultures (vide page 261). 



FIG. 150. Stab cultivations types of growth: a, Filiform; b, beaded; 

 c, echinate; d, villous; e, arborescent. 



(B) Line of Puncture. 



Filiform: Uniform growth, without special char- 

 acters (Fig. 150, a). 



Nodose: Consisting of closely aggregated colonies. 



