Ann. Appl. Biol., 13, 1926, 601; Waksman, in Waksman and Lechevalier, Actinomj'- cetes and Their Antibiotics, Baltimore, 1953, 112.) mar.gi.na'tus. L. part. adj. marginntus margined. Aerial mycelium: Abundant, gray to yellow to olive-buff. Sporophores simple. Spores spherical, 0.8 by 0.87 micron. Gelatin: Thin, pale olive-gray growth covered with abundant, pale gray to olive- buff aerial mycelium. Soluble buff pigment. Synthetic sucrose agar: Thin, echinate growth covered with abundant, olive-buff aerial mycelium. Cream-colored pigment. Synthetic glucose agar: Thin, yellowish growth covered with white to buff aerial mycelium. Soluble buff pigment. Potato agar: Heavy, gray growth covered with white to whitish yellow aerial myce- lium. Soluble, light, golden brown to deep golden brown pigment. Glycerol synthetic solution: Flaky growth at base and on surface. Aerial mycelium scant, olive-buff. Glucose broth: White, spongy mass at surface and on bottom, covered with white to yellow aerial mycelium. Soluble, light golden brown pigment. Milk: Good, flocculated growth. Aerial mycelium white. Coagulation followed by peptonization. Potato: Good, raised growth covered with abundant, buff to olive-buff aerial mycelium. Plug at first gray, later becom- ing black. Starch is hydrolyzed. Tyrosina.se reaction: Negative. Nitrites produced from nitrates. Grows well at 37.5° C. Source : Isolated from a small, unruptured potato scab. Habitat : Potato so far as known. 132. Streptomyces salnionicolor (Mil- lard and Burr, 1926) Waksman, 1953. (Ac- tinomyces salnionicolor Millard and Burr, Ann. Appl. Biol., 13, 1926, 601; Waksman, in Waksman and Lechevalier, Actinomy- cetes and Their Antibiotics, Baltimore, 1953, 113.) sal.mo.ni'co.lor. L. mas.n. salmo salmon; L. gen. noun salmonis of a salmon; L. fem.n. color color; M.L. adj. salnionicolor salmon- colored. Vegetative growth: Hyphae minute. Aerial mycelium: Poorly developed or absent entirely. Sporophores straight or form open spirals. Spores spherical or ellip- soidal, 0.4 to 0.8 by 0.5 to 0.8 micron. Gelatin: Poor growth. Slow liquefaction. Synthetic sucrose agar: Minute, gray to pinkish colonies. No aerial mycelium. No soluble pigment. Synthetic glucose agar: Gray to purplish growth. No aerial mycelium. Faint, golden soluble pigment. Potato agar: Wrinkled, pinkish growth. Glycerol synthetic solution: Poor, flaky growth at bottom of tube. Glucose broth: Growth in form of sponge- like mass. Milk: Fair surface growth. Coagulated; slowly peptonized. Potato: Restricted, wrinkled, raised, ocher-red to brown growth. Plug pigmented drab-gray. Starch is hydrolyzed. Tyrosinase reaction: Negative. Nitrites produced from nitrates. Grows well at 37.5° C. Source: Isolated from sour soil. Habitat: Soil. 133. Streptomyces maculatus (Millard and Burr, 1926) Waksman, 1953. (Actino- myces maculatus Millard and Burr, Ann. Appl. Biol., IS, 1926, 601; Waksman, in Waksman and Lechevalier, Actinomycetes and Their Antibiotics, Baltimore, 1953, 113.) ma.cu.la'tus. L. part. adj. maculatus spotted. Vegetative growth: Dark green. Hyphae extremely fine. Aerial mycelium: Poorly developed; only on certain media as a fine gray cover. Sporophores short, straight. Spores spheri- cal, 0.5 to 0.6 micron. Chlamydospores produced. Gelatin: Poor growth. Slow liquefaction. Synthetic sucrose agar: Round, flat, pale gray to pinkish colonies, later showing dark green centers. No aerial mycelium.
