tilled water and in all salinities through 6 per cent (sea salt) ; optimum apparently about 3 per cent. Greater salinities inhibit development of aerial hyphae. Source: Isolated from blackish sand from the intertidal zone of a beach in North Carolina. Habitat: Found in marine sediments. 91. Streptomyces novaecaesareae Waks- man and Henrici, 1948. (Actinomyces violaceus-caeseri Waksman and Curtis, Soil Sci., 1, 1916, 111; Waksman and Henrici, in Manual, 6th ed., 1948, 951.) no.vae.cae.sa're.ae. M.L. noun Nova Caesarea (the State of) New Jersey; M.L. gen. noun novaecaesareae of New Jersey. Aerial mycelium: Filaments with both straight and spiral aerial hyphae; spirals dextrorse. Conidia ellipsoidal to elongate. Gelatin stab: Small, cream-colored sur- face colonies with slow liquefaction. Agar: Thin, cream-colored growth. Synthetic agar: Gray growth, becoming bluish, glossy, much wrinkled. Aerial mycelium appears late; white. Starch agar: Restricted, circular, bluish violet colonies. Glucose agar: Restricted, gray growth, becoming red. Glucose broth: Fine, colorless, flaky sedi- ment. Litmus milk: Gray ring; coagulated; slow peptonization, becoming faintly alkaline. Potato: Growth cream-colored, wrinkled, turning yellowish. Soluble purple pigment formed. Starch is hydrolyzed. Nitrites produced from nitrates. Aerobic. Optimum temperature, 37° C. Antagonistic properties: Negative. Source: Isolated once from upland California soil. Habitat: Soil. 92. Streptomyces exfoliatus (Waks- man and Curtis, 1916) Waksman and Hen- rici, 1948. (Actinomyces exfoliatus Waksman and Curtis, Soil Sci., 1, 1916, 116; Waksman and Henrici, in Manual, 6th ed., 1948, 951.) ex.fo.li.a'tus. L. part. adj. exfoliatus stripped of leaves. Aerial mycelium: Slightly wavy filaments with tendency to form spirals. Conidia ellipsoidal, 1.0 to 1.5 by 1.2 to 1.8 microns. Gelatin stab: Cream-colored surface growth. Liquefaction. Agar: Grows only in depth of medium. Synthetic agar: Colorless growth, be- coming brown, smooth, glossy. Aerial my- celium in white patches over surface. Starch agar: Restricted, gray growth, becoming brown. Glucose broth: Small, grayish colonies in depth. Litmus milk: Cream-colored ring, soft coagulum in 12 days; slow peptonization, becoming strongly alkaline. Potato : Growth somewhat wrinkled, gray, becoming brown. Brown, soluble pigment formed. Starch is hydrolj^zed. Nitrites produced from nitrates. Aerobic. Optimum temperature, 37° C. Antagonistic properties: Positive. Source: Isolated several times from adobe and upland soils in California. Habitat: Soil. 93. Streptomyces gelaticus (Waksman, 1923) Waksman and Henrici, 1948. (Actino- myces 104, Waksman, Soil Sci., 8, 1919, 165; Actinomyces gelaticus Waksman, in Manual, 1st ed., 1923, 356; Waksman and Henrici, in Manual, 6th ed., 1948, 952.) ge.la'ti.cus. L. part. adj. gelatus frozen, congealed, jellied; M.L. adj. gelaticus re- sembling hardened gelatin. Aerial mycelium: Branching, with open spirals. Gelatin stab: Liquefied with cream- colored flaky sediment. Agar: Wrinkled, cream-colored growth only on the surface. Synthetic agar: Colorless, spreading growth chiefly deep into the medium. Aerial mycelium thin, white, turning grayish. Starch agar: Thin, spreading, cream- colored growth. Glucose agar: Abundant, spreading, white growth. Glucose broth: Thin, cream-colored pel- licle; slight flaky sediment.
