178 



LABORATORY EXERCISES IN BACTERIOLOGY. 



(B) Surface Elevation: 



1. General Character of Surface as a Whole: 



Flat, thin, leafy, spreading over the surface (Fig. 51, A 1). 



Effused, spread over the surface as a thin veilly layer, more delicate than the 



preceding. 



Raised, growth thick, with abrupt, terraced edges (Fig. 51, A 2). 

 Convex, surface the segment of a circle, but very flatly convex (Fig. 51, A 3). 

 Pulvinate, surface the segment of a circle, but decidedly convex (Fig. 51, A 4) 

 Capitate, surface hemispherical (Fig. 51, A 5). 



2. Detailed Characters of Surface: 



Smooth, surface even, without any of the following distinctive characters. 

 Alveolate, marked by depressions separated by thin walls, so as to resemble a 

 honeycomb (Fig. 55, C). 



\J 



FIG. 52. TYPES OF LIQUEFYING CULTURES. (After Chester.} 

 i. Crateriforra. 2. Napiform. j. Saccate. 4. Infundibuliform. 5. Stratiform. 



Punctate, dotted with punctures like pin-pricks. 



Bullate, like a blistered surface, rising in convex prominences, rather coarse. 



Vesicular, more or less covered with minute vesicles due to gas formation more 



minute than bullate. 



Verrucose, wart-like, bearing wart -like prominences. 

 Squamose, scaly, covered with scales. 

 Echinate, beset with pointed prominences. 

 Papillate, beset with nipple or mamma-like prominences. 

 Rugose, short, irregular folds, due to shrinkage of surface growth. 

 Corrugated, in long folds, due to shrinkage. 

 Contoured, an irregular but smoothly undulating surface, like the surface of a 



relief map. 

 Rimose, abounding in chinks, clefts, or cracks. 



