THE CLASSIFICATION OF BACTERIA 253 



Agar colonies. In 2 days like snow crystals, punctiform in centre, surrounded 

 by a bluish toothed zone, becoming round ; 2-4 cm. ; medium-colored 

 yellowish brown. 



Agar slant. Growth white, crumpled, viscid. Nitrates reduced. 



Habitat. Isolated from horse manure. 



129. B. dianthi Arthur-BoUey 



Indiana Ag. Expt. Sta. Bull,, 59, 1896. 



Morphology. Bacilli oval, occur singly, rarely united, 0.9-1.0 : 1-2 jn. In rich 



fluid media more united, forming short filaments, afterward forming 



zoogloea. 

 Neutral gelatin colonies. Zoogloea bodies, with a surrounding irregular area 



of coalescing forms, which appear as large viscid drops. 

 Acid gelatin colonies. Zoogloea make up nearly the entire body of the 



colony, with a more irregular outline and a lobed, wrinkled appearance of 



the surface ; color, light orange. 

 Gelatin slant. Growth smooth, limited, creamy, becoming rough, tuberculate, 



light orange. 

 Gelatin stab. Slight growth in depth ; on the surface, growth arborescent — 



feathery. 

 Agar slant. Growth yellowish. 

 Potato. Growth yellowish. 

 Habitat. Associated with bacteriosis of carnations. 



130. B. Hudson! Dyar 



I.C., 369. 



Morphology. Bacilli 0.5-0.6: 0.7-1.5 ;«,; occur singly and in pairs. 



Potato. Growth thin, translucent, ochreous — orange. 



Agar slant. Growth thick, mustard-colored. 



Lactose-litmus. Reddened, variable. 



Pepton rosolic acid solution. Unchanged. Nitrates not reduced. 



Habitat. Air. 



131. B. theta Dyar 



I.e., 37S- 

 Morphology. Bacilli 0.5-0.7: i.o-i. 3 /*; in pairs. Motility doubtful. 

 Agar slant. Growth translucent, ochreous. 

 Gelatin. Liquefied slowly, after 24 days. 

 Lactose-litmus. Blue. 



