72 CULTURES OF BACTERIA. 
nute vesicles due to gas formation; 
more minute than bullate. 
Verrucous, bearing wart-like prominences. 
Sguamose, scaly. 
Echinate, beset with pointed prominences. 
Papillate, beset with nipple-like processes. 
Rugose, short irregular folds due to shrink- 
age. 
Corrugated, in long folds due to shrinkage. 
Contoured, a smoothly undulating surface. 
Rimose, abounding in clefts or cracks. 
III. Microscopic Structure. 
1. Refraction weak. Outline and surface of 
relief not strongly defined. 
2. Refraction strong. Outline and surface of 
relief strongly marked. 
(a) Dense, not filamentous colonies. 
1. General. 
Amorphous, without definite structure. 
fTyaline, clear and colorless. 
Homogeneous, structure uniform through- 
out all parts of the colony. 
Homochromous, colony of uniform color 
throughout. 
2. Granulations or blotchings. 
Finely granular. 
Coarsely granular. 
Grumous, coarser than preceding. 
Morulord, segmented. 
Clouded, having a pale ground with ill- 
defined patches of a deeper tint. 
