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,
