growth. Aerial mycelium white to drab. Soluble, cinnamon-buff to brown pigment. Nutrient potato agar: Wrinkled, gray to grayish-olive growth. Trace of aerial myce- lium. Soluble, deep golden brown pigment. Glycerol synthetic solution: Growth in form of compact colonies at bottom and along sides of tube with some on surface, colored salmon to brown. Scant drab aerial mycelium. Soluble, buff to golden pigment. Glucose broth: Sponge-like growth at bottom of tube. Soluble deep, golden brown pigment. Potato: Wrinkled, gray to orange to brown growth. Aerial mj'celium gray to olive-buff. Plug gray to brown. Starch is hydrolyzed. Tyrosinase reaction: Positive. Nitrites not produced from nitrates. Fair growth at 37.5° C. Source : Isolated from limed soil and from the common scab of a potato. Habitat: Soil and potatoes so far as known. 119. Streptomyces fimbriatus (Millard and Burr, 1926) Waksman, 1953. (Actino- myces fimbriatus Millard and Burr, Ann. Appl. Biol., 13, 1926, 601; Waksman, in Waksman and Lechevalier, Actinomycetes and Their Antibiotics, Baltimore, 1953, 104.) fim.bri.a'tus. L. adj. fimbriatus fibrous, fringed. Vegetative growth: Chocolate-colored. Aerial mycelium: Mouse-gray. Sporo- phores form spirals with 3 or more turns. Spores cylindrical to ellipsoidal, 0.9 by 0.9 to 1.2 microns. Gelatin: Good growth with white aerial mycelium. Soluble reddish pigment. Slow- liquefaction. Synthetic sucrose agar: Gray growth. Aerial mycelium abundant, white to gray, with a few specks of white. Soluble, cream- colored pigment. Synthetic glucose agar: Very good growth. Aerial mycelium white to mouse-gray. Nutrient potato agar: Gray to blackish, flat colonies with raised center; a few specks of white aerial mycelium. Soluble, golden l)rown pigment. Glycerol synthetic solution: Numerous colonies covering surface of medium and throughout medium; aerial mycelium scant, white. Glucose broth: Flocculated growth, mostly at bottom. No aerial mycelium. Soluble golden brown pigment. Milk: Good growth. Not coagulated and not hydrolyzed. Potato: Mouse-gray growth. Aerial my- celium on dried portions of growth scant, white to mouse-gray. Black pigment around growth. Starch is hydrolyzed. Tyrosinase reaction: Strongly positive. Nitrites produced from nitrates. Source: Isolated from a small, partly ruptured potato scab. Habitat: Found in potatoes so far as known. 120. Streptomyces carnosus (Millard and Burr, 1926) Waksman, 1953. (Actino- myces carnosus Millard and Burr, Ann. Appl. Biol., 13, 1926, 601; Waksman, in Waksman and Lechevalier, Actinomycetes and Their Antibiotics, Baltimore, 1953, 105.) car.no'sus. L. adj. carnosus pertaining to flesh. Vegetative growth: Good, wrinkled growth on synthetic and organic media. Aerial mycelium: White to gray. Spores cylindrical, 0.75 by 1.0 micron. Gelatin: Growth covered with aerial mycelium, white in center, gray in margin. Rapid liquefaction. Synthetic sucrose agar: Pale smoke-gray growth, covered with abundant, gray aerial mycelium. Colorless guttation drops appear over the whole surface. Synthetic glucose agar: Pale olive-gray growth, covered with abundant, white to gray aerial mycelium. Soluble, ivory-yellow to cartridge -buff pigment. Nutrient potato agar: Heavy, lichenoid, gray-colored growth. Aerial mycelium scant, white to gray; property lost on culti- vation. Light golden to brown pigment. Glycerol synthetic solution: Whitish to gray, discrete colonies, clinging to side or bottom of tube. Aerial mycelium scant, pale gray. Glucose broth: Whitish, sponge-like masses, sinking to bottom of tube. Milk: Good surface growth. No aerial
