46 A MANUAL OF BACTERIOLOGY 



d. Topography of surface: smooth; contoured, smoothly 

 undulating, like the surface of a relief map ; rugose, 

 short, irregular folds due to shrinkage ; verrucose, 

 growth wartlike, with wartlike prominences. 

 II. Microscopic appearance. 



a. Edge of colony: entire (Fig. 25, A) ; undulate, wavy 

 (Fig. 25, By, repand(Fig. 25, (7); lobate(Fig. 25, D); 



E F G 



FIG. 24. Types of surface elevation of bacterial colonies 



A, flat ; />', raised ; C, convex ; D, pulvinate ; K, capitate ; F, umbilicate ; 

 G, umbonate 



auriculate (Fig. 25, ./?); lacerate, irregularly cleft 

 (Fig. 25, F) ; fimbricate, fringed (Fig. 25, G) ; ciliate 

 (Fig. 25, N) ; erose, irregularly toothed (Fig. 25, /). 

 />. Internal structure : amorphous, no definite structure ; 

 finely granular ; coarsely granular ; grumose^ appears 



FIG. 25. Types of margin of bacterial colonies 



A, entire ; B, undulate ; C, repand ; 7>, lobate; E, auriculate ; F, lacerate : 

 G, fimbricate ; //, ciliate ; /, erose 



clotted (Fig. 26, 7>) ; (/yrw<> showing chinks or 



cracks (Fig. 26, E) ; reticulate, netted (Fig. 26, ) ; 



filamentous ; floocose. 

 /B. Deep colonies. 

 a. Color. 

 I. Shape : punctiform, lanceolate, oval, circular, spindle 



shaped, irregular, branched, filamentous. 

 c. Translucent-}'. 



