INTERNAL STRUCTURE OF COLONY 



265 



Rugose: Short irregular folds, due to shrinkage of 

 surface growth. 



Corrugated . In long folds, due to shrinkage. 



Contoured: An irregular but smoothly undulating 

 surface, resembling the surface of a relief map. 



Rimose: Abounding in chinks, clefts, or cracks. 



(D) Internal Structure of Colony (Microscopical). 

 Refraction Weak: Outline and surface of relief not 



strongly defined. 



Refraction Strong: Outline and surface of relief 



strongly defined; dense, not filamentous colonies. 



a b c 



FIG. 145. Types of colonies: a, Grumose; &, moruloid; c, clouded. 



1. General: 



Amorphous : Without any definite structure, such as 

 is specified below. 



Hyaline : Clear and colourless. 



Homogeneous: Structure uniform throughout all 

 parts of the colony. 



Homochromous : Colour uniform throughout.- 



2. Granulations or Blotchings: 

 Finely granular. 



Coarsely granular. 



Grumose : Coarser than the preceding, with a clotted 



