314 



ORDER IV. EUBACTERIALES 



bal.us.ti'num. Etymology uncertain. 



Rods, 0.6 by 2.0 to 4.0 microns, forming 

 short chains. Non-motile. Gram-negative. 



Gelatin colonies: Circular, bright yellow 

 center, entire. 



Gelatin stab: Liquefaction. 



Agar colonies: Punctiform, cadmium- 

 3^ellow, convex, shiny, transparent. 



Agar slant: Egg-yolk-yellow, semi-trans- 

 parent streak, smooth, shiny, becoming 

 brownish yellow. 



Ammonium phosphate agar: Slight, yel- 

 low growth. 



Broth: Turbid with j^ellow sediment. 



Litmus milk: Slightly acid with j^ellow 

 sediment. 



Potato: Scant, j^ellow growth. 



Indole not produced. 



Hydrogen sulfide not produced. 



Faint acid from glucose. No action on 

 lactose or sucrose. 



Nitrites produced from nitrates in trace 

 amounts. 



Ammonia not produced. 



Loeffler's blood serum: Not liquefied. 

 Egg-yolk-like growth. 



Aerobic, facultatively anaerobic. 



Optimum temperature, between 20° and 

 25° C. 



Source: Isolated from living halibut 

 obtained at 30 to 50 fathoms. Pacific Ocean. 



Habitat: Found on the skins of fishes. 



6. Flavobacterium solare (Lehmann 

 and Neumann, 1896) Bergey et al., 1923. 

 (Bacterium solare Lehmann and Neumann, 

 Bakt. Diag., 1 Aufl., 2, 1896, 258; Bergey et 

 al., Manual, 1st ed., 1923, 116.) 



so.la're. L. adj. Solaris of the sun, solar, 

 with rays. 



Rods, 0.3 to 0.4 micron in width, forming 

 short or long, strongly twisted threads. 

 Non-motile. Gram-negative. 



Gelatin colonies: Circular, yellow, glis- 

 tening, translucent; projecting rays. 



Gelatin stab: Yellow, arborescent growth 

 in stab. No liquefaction. Surface growth is 

 lemon-yellow. 



Agar slant: Pale yellow, raised, arbores- 

 cent growth. 



Broth: Clear. No gas from sugar broths. 



Litmus milk: Unchanged. 



Potato: Dull white growth becoming 

 yellow. 



Indole not produced. 



Hydrogen sulfide not produced. 



Nitrites not produced from nitrates. 



Aerobic, facultatively anaerobic. 



Optimum temperature, 30° C. 



Distinctive character: Resembles Flavo- 

 bacterium arborescens Bergey et al. in type 

 of growth. 



Source: Isolated from Wiirzburg tap 

 water. Gibbons (Contrib. to Canadian Biol, 

 and Fish., 8, 1934, 279) reports this species 

 as occurring in the slime of a skate (Raja 

 erinacea) and of a hake (Urophrjcis tenuis). 



Habitat: Found in fresh and salt water. 



7. Flavobacterium lutescens (Migula, 

 1900) Bergey et al., 1923. (Bacillo giallo, 

 Lustig, Diagnostica dei batteri delle acque, 

 Torino, 1890, 91; also see translation of 

 2nd ed. by Teuscher, Diagnostik der Bak- 

 terien des Wassers, 1893, 78; Bacterium 

 lutescens Migula, Syst. d. Bakt., 2, 1900, 

 476; Bergey et al.. Manual, 1st ed., 1923, 

 114.) 



lu.tes'cens. L. part. adj. lutescens becom- 

 ing muddy. 



Rods, 0.5 by 0.95 micron, occurring 

 singly and in pairs. Non-motile. Gram-nega- 

 tive. 



Gelatin colonies: Circular, yellow, lobate. 



Gelatin stab: Slow liquefaction. 



Agar slant: Growth pale yellow, becom- 

 ing golden yellow. 



Broth: Turbid. 



Litmus milk: Alkaline. 



Potato: Lu.xuriant, golden yellow growth. 



Indole not produced. 



Nitrites produced from nitrates. 



Aerobic, facultatively anaerobic. 



Optimum temperature, between 30° and 

 35° C. 



Source: Isolated from water. Gibbons 

 (Contrib. to Canadian Biol, and Fish., 8, 

 1934, 279) reports this species as occurring 

 in the slime of the cod (Gadus callarias). 



Habitat: Found in fresh and salt water. 



8. Flavobacterium dormitator (Wright, 

 1895) Bergey et al., 1923. {Bacillus dormita- 

 tor Wright, Memoirs Nat. Acad. Sci., 7, 



