“STAB” CULTURES. 63 
Fic. 38.—Various forms of gelatin ‘‘stab’’ cultures: a, 
Bacillus typhosus; 6, Bacterium anthracis; c, Bacillus 
mycoides ; d, Bacillus mesentericus ; ¢, Bacillus cedematis ; 
J, Bacillus radiatus. 
Chester’ for describing the characters of gelatin 
stab cultures : 
L Non-liquefying Cultures. 
Line of puncture may be— 
filiform, euifema growth without special charac- 
ers. 
Nodose, consisting of closely aggregated colonies. 
Beaded, consisting of loosely placed, disjointed. 
colonies. 
Papillate, beset with papillate extensions. 
Echinate, beset with acicular extensions. 
Villous, beset with short, undivided, hair-like ex- 
tensions. 
Plumose, a delicate feathery growth. 
Arborescent, branched or tree-like, beset with branched 
hair-like extensions. 
1 Eleventh Annual Report of the Delaware College Agri- 
cultural Experiment Station, Newark, Delaware, 1898-1899. 
