It is very interesting to know the distribution of Streptomyces in natural environment. Several investigators, such as Waksman and Curtis (1916)¹⁾, Conn (1917)²⁾, Jensen (1930)³⁾ and Johnston (1947)⁴⁾ have reported on the distribution of Streptomyces in the soil. However, very little is known about the distribution of Streptomyces classified on the basis of morphological types. Recently, we have collected soil samples from 3 areas near Osaka and isolated totally 848 strains of Streptomyces: 277 strains from 23 soil samples collected from Shioya, Kobe city, 431 strains from 24 soil samples collected from Minō Park, Osaka Prefecture, and 140 strains from 18 soil samples collected from Abuyama, Osaka Prefecture.

The purpose of this report is to present the result of classification of the isolates based on our classification system (1959)^{5), 6)}.