Supplement, dated September 24, 1999, to the
Statement of Additional Information, dated June 1, 1999,
of Seligman California Municipal High-Yield Series and
Seligman California Municipal Quality Series (together, the "Series")
of Seligman Municipal Series Trust (the "Fund")
The following supersedes the information appearing in the fifth
paragraph of page 3 of the Series' Statement of Additional Information.
On September 16, 1999, the Fund's Trustees eliminated the non-fundamental
policy which prohibited each Series of the Fund, with respect to 75% of the
value of its assets, from purchasing any revenue bonds if, as a result of such
purchase, more than 5% of the Series' assets would be invested in the revenue
bonds of a single issuer. However, each Series remains subject to a fundamental
policy which prohibits each Series, with respect to 50% of the value of its
total assets, from purchasing the securities of any one issuer if, as a result
of such purchase, more than 5% of the Series' total assets (at market value)
would be invested in the securities of a single issuer (except that this
limitation does not apply to obligations issued or guaranteed by the US
Government or its agencies or instrumentalities).
