THE CLASSIFICATION OF BACTERIA 167 



Gelatin stab. In depth, growth beaded, yellowish white ; a whitish yellow 



crumpled membrane on the surface of the liquefied gelatin. 

 Potato. Growth thin, dry, yellowish gray. 

 Habitat. Water. 



119. Bact. citreum (Strassman-Stecker) 



B. citreus-cadaveris Strassman-Strecker : Bakterien bei der Leichenfaulniss, 1888. 

 B. Streckeri Trevisan : Genera, 1889, 17. 



Morphology. Bacilli 0.6-0.9 fi ; often in chains. 



Gelatin colonies. Punctiform. 



Gelatin stab. An air bubble above, under this a yellowish layer, under this a 



clear canal of liquefied gelatin, containing a yellowish sediment. Odor 



of HjS. 

 Potato. Growth citron-yellow, dry. Non-pathogenic. 

 Habitat. Isolated from a human corpse 50 hours after death. 



120. Bact. bucallis 



Bacillus g. Vignal: Archiv Phys., VIII, 1886. 



B. bucallis-minutus Sternberg : Manual of Bacteriology, 1892, 643. 



Morphology. Rods scarcely longer than broad, 0.5-1.0 /x. 



Gelatin colonies. In 48 hours, round, elevated, slightly yellowish, surrounded 



by liquefied gelatin. 

 Gelatin stab. In 48 hours the growth in depth is yellowish white, beaded ; on 



the surface, a cup-shaped liquefaction ; in 6 days a small funnel. 

 Agar slant. Golden yellow colonies, easily removed with a needle. 

 Bouillon. Turbid, with an iridescent pellicle. 

 Potato. Growth thin, yellowish, becoming brownish. 

 Habitat. Isolated from the saliva of healthy persons. 



121. Bact. pseudoconjunctivitidis (Kruse) 



Bacillus igyptischen katarrhalischen Conjunctivitis Kartulis : Centralblatt f. Bak- 



teriol., I, 1887, 289. 

 B. pseudoconjunctivitidis Kruse: Fliigge, Die Mikroorganismen, 1896, 441. 



Morphology. Bacilli minute, 0.25:1.0/0. Cultures produce a canary-yellow 



pigment. 

 Gelatin stab. A nail-shaped growth with a flat head, yellow ; liquefaction slow. 

 Potato. Growth limited, bright brown. 

 Habitat. Isolated from conjunctival secretions. 



