182 



LABORATORY EXERCISES IN BACTERIOLOGY. 



Moruloid, having the character of a morula, segmented, by which the colony 



is divided in more or less regular segments (Fig. 55, E). 

 Clouded, having a pale ground, with ill-defined patches of a deeper tint (Fig. 



55, F). 

 Colony Marking or Striping: 



Reticulate, in the form of a network, like the veins of a leaf (Fig. 55, G). 

 Areolate, divided into rather irregular, or angular, spaces by more or less definite 



boundaries. 



Gyrose, marked by wavy lines, indefinitely placed (Fig. 55, I). 

 Marmorated, showing faint, irregular stripes, or traversed by vein-like markings, 



as in marble (Fig. 55, H). 



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

 Rimose, showing chinks, cracks, or clefts. 



FIG. 55. SURFACE CHARACTERS OF COLONIES. (After Chester.] 



A. Conglomerate. B. Toruloid. C. Alveolate. D. Grumose. E. Moruloid. F. Clouded. 

 G. Reticulate. H. Marmorated. /. Gyrose. 



Filamentous Colonies'. 



Filamentous, as already defined (Fig. 54, E). 



Floccose, composed of filaments, densely placed. 



Curled, filaments in parallel strands, like locks or ringlets, as in agar colonies 



of B. anthracis (Fig. 53, F). 

 (D) Edges of Colonies: 



Entire, without toothing or division (Fig. 56, A) 



Undulate, wavy (Fig. 56, B). 



Repand, like the border of an open umbrella (Fig. 56, C). 



Erose, as if gnawed, irregularly toothed (Fig. 56, I). 



Lobate (Fig. 56, D). 



Lobulate, minutely lobate (Fig. 56, D). 



Auriculate, with ear-like lobes (Fig. 56, E). 



Lacerate, irregularly cleft, as if torn (Fig. 56, F). 



