Chester's Terminology for Description of Col- 

 onies. 



1. Form of Colonies — Plate Culture. 



Puncttform : dimensions too slight for defining 

 form by naked eye, minute, raised, semi- 

 spherical. 



Round : of a more or less circular outline. 



Irregular : 



Elliptical : 



Fusiform : spindle-shaped, tapering at each 

 end. 



Cochleate . spiral or twisted like a snail shell. 



Ameboid : very irregular, streaming. 



Mycelioid : a filamentous colony, with the ra- 

 diate character of a mould. 



Filamentous : an irregular mass of loosely 

 woven filaments. 



Floccose : of a densely woolly structure. 



Rhizoid : of an irregular branched, root-like 

 character, as in Bad. mycoides. 



Conglomerate: an aggregate of colonies of 

 similar size and form. 



Toruloid : an aggregate of colonies like the 

 budding of the yeast plant. 



Rosulate : shaped like a rosette. 



2. Detailed character of surface. 



Smooth : surface even without any of the fol- 

 lowing distinctive characters. 



Alveolate : marked by depressions separated by 

 thin walls, so as to resemble a honeycomb. 



Punctate : dotted with punctures like pin- 

 pricks. 



