794 



ORDER V. ACTINOMYCETALES 



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. 



