THE CLASSIFICATION OF BACTERIA 305 



Gelatin stab. In depth, growth thin, filiform, liquefied ; on the surface, a 

 small, funnel-shaped depression, with pigment, becoming generally 

 liquefied. 



Agar slant. Growth at 20°, moist, glistening, spreading, of a crimson lake 

 color ; at 37°, growth milky white. 



Potato. Growth viscid — slimy, red, spreading. 



Bouillon. Turbid ; a red pigment at room temperatures. 



Habitat. Water. 



271. B. apicum Kruse 



Described by Canestrini : Atti Soc. Ven. Trent. Soi. Nat,, XII, 134. 

 B. aflcum Kruse : Flugge, Die Mikroorganismen, 1896, 233. 



Morphology. Bacilli 2 : 4-6 fx., ends rounded ; occur singly, in pairs and chains. 



Grow at 37°. Stained by Gram's method. 

 Gelatin stab. Liquefied gelatin pink above ; sediment white. 

 Agar slant. Growth whitish. 

 Blood serum. Liquefied. Bacilli show a. capsule, often surrounding a chain 



of individuals. 

 Potato. Growth wine-colored. 



Pathogenic. To bees, not so to mice and guinea pigs. 

 Habitat. Isolated from sick bees and their larvae. 



272. B. Danteci Kruse 



Bacille du rouge de la morue Dantec : Ann. Pasteur Inst., 1891, 659. 

 B. Danteci Kruse : Flugge, Die Mikroorganismen, 1896, 270. 



Morphology. Bacilli 4-12 ft long, rather thicker than B. tetani. 



Gelatin colonies. Pale red disks, deeper in color at the periphery; gelatin 



liquefied slowly. 

 Potato. A scanty growth. 



Bouillon. Turbid; no pigment. Produces red pigment on fish. 

 Habitat. Isolated from fish. 



273. B. Berolinensis Kruse 



Described but not named by Plagge-Proskauer : Zeitsch. f. Hygiene, II, 1887, 463. 

 B. violaceus-Berol'mensis Kruse : Flugge, Die Mikroorganismen, 1896, 311. 



Morphology. Bacilli 0.8 : 1.7 /x, in twos. Do not grow at 37°- 

 Gelatin colonies. Irregular, granular, becoming liquefied ; centres dark, bor- 

 ders twisted, filamentous. 

 Gelatin stab. Liquefaction infandibuliform ; a violet sediment. 



