The Fundamentals of Bacteriology

by Charles Bradfield Morrey

Fig. 150

Fig. 151

Fig. 148.—Crateriform liquefaction of gelatin. × ½.
Fig. 149.—Funnelform liquefaction of gelatin. × ½.
Fig. 150.—Saccate liquefaction of gelatin. × ½.
Fig. 151.—Stratiform liquefaction of gelatin. × ½.

Along the line of puncture the commonest types are filiform ([Fig. 145]), which indicates a uniform growth; beaded ([Fig. 146]), or small separate colonies; villous ([Fig. 147]), delicate lateral outgrowths which do not branch; arborescent, tree-like growths branching laterally from the line. In agar these branchings are usually short and stubby, or technically, papillate.

Fig. 152.—Filiform slope culture. × ½.

Fig. 153.—Filiform, slightly spreading, slope culture. × ½.