36 



LABORATORY BACTERIOLOGY 



HomochroiHous : color uniform throughout. 

 Granulations or blotchings. 

 Finely granular. 

 Coarsely granular. 

 Gmmose : coarser than the preceding, a clotted appearance, 



particles in clustered grains. 

 Moricloid : having the character of a morula segmented, by 

 which the colony is divided into more or less regular 

 segments. 

 Clouded : having a pale ground, with ill-defined patches of 

 a deeper tint. 



4 5 6 



Fig. 4. Types of colonies: 1, cochleate ; 2, amceboid; 3, rhizoid; 

 4, mycelioid ; 5, filamentous ; 6, curled structure. 



.. Colony marking or striping (surface). 



Reticulate : in the form of a network like the veins of a leaf. 

 Areolate : divided into rather irregular or angular spaces 



by more or less definite boundaries. 

 Gyrose : marked by wavy lines indefinitely placed. 

 Marmorated : showing faint, irregular stripes, or traversed 



by veinlike markings as in marble. 

 Rivulose : marked by lines, like the rivers of a map. 

 Rimose : showing chinks, cracks, or clefts. 

 Filamentous : as already defined. 

 Floccose : composed of filaments densely placed. 

 Curled: filaments in parallel strands, like locks or ringlets, 



as in agar colonies of Baet. anthracis. 



