Compt. rend. Soc. Biol., Paris, 87, 1922, 339; Hauduroy et al., Diet. d. Bact. Path., 1937, 78; Ristella trichoides Pr4vot, Ann. Inst. Past., 60, 1938, 292.) tri.cho.i'des. Gr. adj. trichoides hair-like. Rods, 0.3 by 5.0 microns, with rounded ends. Pleomorphic with long filaments in cultures. Non-motile. Gram-negative. Gelatin: No liquefaction. Glucose agar: Deep colonies lenticular, tenacious, whitish. Martin broth: Uniform turbidity in 2 to 3 days followed by fiocculent precipitate and clearing. Milk: Acid and coagulation. Coagulated egg white: Not digested. Coagulated serum: Not digested. Hydrogen sulfide produced. Acid and gas from glucose, maltose, su- crose, fructose, lactose and mannitol. Gas but no acid from glycerol. Neutral red decolorized. Anaerobic. Optimum temperature, 37° C. Pathogenicity: Produces subcutaneous abscesses in rabbits. Source: One strain was isolated from a case of cholecystitis. Habitat: Presumably found in various in- fections in man. 8. Bacteroides terebrans (Brocard and Pham, 1934) Kelly, comb. nov. {Bacillus terebrans Brocard and Pham, Compt. rend. Soc. Biol., Paris, 117, 1934, 997; Ristella terebrans Prevot, Ann. Inst. Past., 60, 1938, 291.) te.re'brans. L. part. adj. terebrans per- forating. Rods, 2 to 3 microns long, with rounded ends. Pleomorphic with swollen bodies and chromatic granules. Non-motile. Gram- negative. Gelatin: No liquefaction. Glucose agar: Deep colonies spherical with irregular edges. Some gas. Glucose broth: Uniform turbidity; some gas with foul odor. Milk: Acid but no coagulation. Coagulated egg white: Not digested. Coagulated serum: Not digested. Growth inhibited by bile. Hydrogen sulfide not produced. Acid and gas from glucose, fructose, maltose, lactose, sucrose and mannitol. Neutral red decolorized. Anaerobic. Optimum temperature, 37° C. Pathogenicity doubtful. Source: Two strains were isolated from cases of gangrenous erysipelas associated with a streptococcus. Habitat: Presumably found in various infections in man. 9. Bacteroides halosniophilus Baum- gartner, 1937. (Baumgartner, Food Re- search, 2, 1937, 321; Ristella halosmophila Prevot, Man. de Class, et de Determ. des Bact. Ana^robies, 1940, 47.) ha.los.mo'phi.lus. Gr. noun hals salt; Gr. noun osnms a pushing, thrust; Gr. adj. philus loving; M.L. adj. halosniophilus salt-pressure-loving. Rods, with rounded ends and frequently curved, varying in size and shape, the aver- age size being 0.5 by 2.0 to 3.0 microns, occurring singly, in pairs and occasionally in chains. Pleomorphic. Non-motile. Gram- negative. Gas is produced. NaCl-nutrient gelatin: No liquefaction in 21 days. NaCl-nutrient broth: Uniform turbidity; sparse, granular sediment. NaCl-agar colonies: After 4 to 6 days, 2 to 3 mm in diameter, finely granular, smooth, moist, low convex, round, entire, translucent, buff-colored, readily emulsi- fied in 15 per cent NaCl solution. NaCl-agar streak: Buff-colored, trans- parent, beaded. NaCl cooked meat medium: Gas pro- duced. Meat slightly reddened in 4 days. Slight fetid odor. Indole not produced. Hydrogen sulfide produced in trace amounts. Acid and gas from glucose, maltose and glycerol. No acid from lactose, sucrose, inulin, mannitol, dulcitol or salicin. Starch not hydrolyzed. Nitrites not produced from nitrates in 21 days. Halophilic; more than 4 per cent NaCl is
