SELIGMAN HIGH INCOME FUND SERIES
485BPOS, 1998-04-29
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                                                                File No. 2-93076
                                                                        811-4103

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
- --------------------------------------------------------------------------------

                                    FORM N-1A

         REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933            [X]

              Pre-Effective Amendment No.                                   [ ]

   
              Post-Effective Amendment No.  24                              [X]
    

         REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940    [X]

   
              Amendment No.  26                                             [X]
- --------------------------------------------------------------------------------
    

                        SELIGMAN HIGH INCOME FUND SERIES
               (Exact name of registrant as specified in charter)
- --------------------------------------------------------------------------------

                    100 PARK AVENUE, NEW YORK, NEW YORK 10017
                    (Address of principal executive offices)

     Registrant's Telephone Number: 212-850-1864 or Toll Free: 800-221-2450
- --------------------------------------------------------------------------------

      THOMAS G. ROSE, Treasurer, 100 Park Avenue, New York, New York 10017
                     (Name and address of agent for service)

- --------------------------------------------------------------------------------

It is proposed that this filing will become effective (check appropriate box):

[X] immediately upon filing pursuant to paragraph (b)

[ ] on     (date)       pursuant to paragraph (b)

[ ] 60 days after filing pursuant to paragraph (a)(1)

[ ] on (date) pursuant to paragraph (a)(1)

[ ] 75 days after filing pursuant to paragraph (a)(2)

[ ] on (date) pursuant to paragraph (a)(2) of rule 485.

If appropriate, check the following box:

[ ]  This  post-effective  amendment  designates  a  new  effective  date  for a
previously filed post-effective amendment.

   
Registrant  has  registered  an  indefinite   amount  of  securities  under  the
Securities Act of 1933 pursuant to Rule  24f-2(a)(1) and a Rule 24f-2 Notice for
Registrant's  most recent fiscal year was filed with the Commission on March 27,
1998.
    

<PAGE>

                                                               File No. 2-93076
                                                                       811-4103



   
                        SELIGMAN HIGH INCOME FUND SERIES
                         FORM N-1A CROSS REFERENCE SHEET
                         POST-EFFECTIVE AMENDMENT NO. 24
                            Pursuant to Rule 481 (a)
    
<TABLE>
<CAPTION>

Item in Part A of Form N-1A                            Location in Prospectus
- ---------------------------                            ----------------------
<S>                                                    <C>          
 1.  Cover Page                                        Cover Page

 2.  Synopsis                                          Summary of Series' Expenses

 3.  Condensed Financial Information                   Financial Highlights

 4.  General Description of Registrant                 Cover Page; Organization And Capitalization

 5.  Management of the Fund                            Management Services

5a.  Manager's Discussion of Fund Performance          Management Services

 6.  Capital Stock and Other Securities                Cover Page; Organization and Capitalization

 7.  Purchase of Securities Being Offered              Alternative Distribution System; Purchase of Shares; Administration,
                                                       Shareholder Services and Distribution Plan

 8.  Redemption or Repurchase                          Telephone Transactions; Redemption of Shares; Exchange Privilege

 9.  Pending Legal Proceedings                         Not Applicable

Item in Part B of Form N-1A                            Location in Statement of Additional Information*
- ---------------------------                            ------------------------------------------------
10.  Cover Page                                        Cover Page

11.  Table of Contents                                 Table Of Contents

12.  General Information and History                   General Information; Appendix

13.  Investment Objectives and Policies                Investment Objectives, Policies And Risks; Investment Limitations

14.  Management of the Registrant                      Management And Expenses

15.  Control Persons and Principal                     Trustees and Officers; General Information
     Holders of Services

16.  Investment Advisory and Other Services            Management and Expenses; Distribution Services

17.  Brokerage Allocation                              Portfolio Transactions; Administration, Shareholder Services and Distribution
                                                       Plans

18.  Capital Stock and Other Securities                General Information

19.  Purchase, Redemption and Pricing                  Purchase and Redemption of Series' Shares; Valuation
     of Securities being Offered

20.  Tax Status                                        Federal Income Taxes  (Prospectus)

21.  Underwriters                                      Distribution Services

22.  Calculation of Performance Data                   Performance

23.  Financial Statements                              Financial Statements
</TABLE>

*    Each of  Registrant's  two Series has a separate  Prospectus;  Registrant's
     Statement of Additional Information applies to both Series.

<PAGE>


                                    SELIGMAN
                                    --------
                                U.S. GOVERNMENT
                               SECURITIES SERIES


                                    [GRAPHIC]

                                   PROSPECTUS
                                   ----------

                                   MAY 1, 1998

                                     [LOGO]
                             J. & W. SELIGMAN & CO.
                                  INCORPORATED
                                ESTABLISHED 1864

<PAGE>


TABLE OF CONTENTS

Summary of Series Expenses   2

Financial Highlights   3

Alternative Distribution System   5

Investment Objective, Policies and Risks   7

Management Services   9

Purchase of Shares   11

Telephone Transactions   17

Redemption of Shares   18

Administration, Shareholder Services
  and Distribution Plan   21

Exchange Privilege   22

Further Information about Transactions
  in the Series   24

   
Dividends and Capital Gain Distributions   25
    

Federal Income Taxes   26

Shareholder Information   27

Advertising the Series' Performance   29

Organization and Capitalization   29


TIMES CHANGE ... VALUES ENDURE


<PAGE>


                   SELIGMAN U.S. GOVERNMENT SECURITIES SERIES

   
                                   a series of
                        Seligman High Income Fund Series
 100 Park Avenue o New York, NY 10017 o New York City Telephone: (212) 850-1864
                       Toll-Free Telephone: (800) 221-2450
      For Retirement Plan Information--Toll-Free Telephone: (800) 445-1777

                                                                     May 1, 1998

     Seligman  High Income Fund Series (the "Fund") is a  diversified,  open-end
management  investment  company  that offers two series  which each seek to earn
high  current  income  by  investing  in  debt  securities  but  have  different
investment   objectives  and  investment   policies.   Investment  advisory  and
management  services  are  provided  to  the  Fund  by J.  & W.  Seligman  & Co.
Incorporated  (the  "Manager");  the Fund's  distributor  is Seligman  Financial
Services, Inc., an affiliate of the Manager.

     The investment objective of the SELIGMAN U.S. GOVERNMENT  SECURITIES SERIES
(the  "Series") is to produce high current  income.  The Series seeks to achieve
its objective by investing primarily in debt obligations issued or guaranteed by
the United States Government,  its agencies or instrumentalities.  While certain
debt  obligations  in the Series are issued or  guaranteed  by the United States
Government  or  by  United  States  Government-related  instrumentalities,  such
investments  are still subject to the risk of market value  fluctuations.  For a
description of the Series' investment objective and policies, including the risk
factors associated with an investment in the Series, see "Investment  Objective,
Policies  and Risks."  There can be no  assurance  that the  Series'  investment
objective will be achieved.

     The Series offers three classes of shares.  Class A shares are sold subject
to an initial  sales  load of up to 4.75% and an annual  service  fee  currently
charged  at a rate of up to .25% of the  average  daily net  asset  value of the
Class A shares.  Class A shares purchased in an amount of $1,000,000 or more are
sold  without an initial  sales load but are  subject to a  contingent  deferred
sales load ("CDSL") of 1% on  redemptions  within  eighteen  months of purchase.
Class B shares are sold without an initial sales load but are subject to a CDSL,
if  applicable,  of 5% on  redemptions  in the first year after purchase of such
shares,  declining  to 1% in  the  sixth  year  and  0%  thereafter,  an  annual
distribution  fee of .75% and an annual service fee of up to .25% of the average
daily  net  asset  value of the  Class B  shares.  Class B shares  will  convert
automatically  to Class A shares on the last day of the month that  precedes the
eighth anniversary of their date of purchase. Class D shares are sold without an
initial sales load but are subject to a CDSL of 1% imposed on redemptions within
one year of  purchase,  an annual  distribution  fee of up to .75% and an annual
service  fee of up to .25% of the  average  daily net asset value of the Class D
shares.  Any CDSL  payable  upon  redemption  of shares  will be assessed on the
lesser of the  current  net asset value or the  original  purchase  price of the
shares  redeemed.  No CDSL  will be  imposed  on  shares  acquired  through  the
reinvestment  of  dividends  or gain  distributions  received  from any class of
shares.  See  "Alternative  Distribution  System."  Shares of the  Series may be
purchased through any authorized investment dealer.
    

     This Prospectus sets forth concisely the information a prospective investor
should know about the Series before  investing.  Please read it carefully before
you invest and keep it for future  reference.  Additional  information about the
Series, including a Statement of Additional Information, has been filed with the
Securities and Exchange Commission.  The Statement of Additional  Information is
available  upon request and without charge by calling or writing the Fund at the
telephone  numbers or the address set forth above.  The  Statement of Additional
Information is dated the same date as this Prospectus and is incorporated herein
by reference in its entirety. 

SHARES IN THE FUND ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
    BY, ANY BANK, AND SHARES ARE NOT FEDERALLY INSURED BY THE FEDERAL DEPOSIT
      INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER AGENCY.

  THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
 EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
        AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED
              UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY
              REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

<PAGE>


                           SUMMARY OF SERIES EXPENSES
<TABLE>
<CAPTION>

                                                                          CLASS A             CLASS B           CLASS D
                                                                         ---------          -----------       -----------
                                                                      (Initial Sales      (Deferred Sales   (Deferred Sales
                                                                     Load Alternative)   Load Alternative) Load Alternative)
<S>                                                                    <C>               <C>                <C>             
   
SHAREHOLDER TRANSACTION EXPENSES
      Maximum Sales Load Imposed on Purchases (as a percentage
         of offering price).............................................   4.75%               None               None
      Sales Load on Reinvested Dividends................................    None               None               None
      Deferred Sales Load (as a percentage of original
         purchase price or redemption proceeds, whichever is lower).....   None;          5% in 1st year    1% in 1st year
                                                                          except 1%       4% in 2nd year    None thereafter
                                                                      in first 18 months   3% in 3rd and
                                                                      if initial sales       4th years
                                                                      load was waived     2% in 5th year
                                                                       in full due to     1% in 6th year
                                                                      size of purchase    None thereafter
      Redemption Fees...................................................    None               None               None
      Exchange Fees.....................................................    None               None               None

ANNUAL SERIES OPERATING EXPENSES  FOR 1997                                CLASS A             CLASS B           CLASS D
                                                                         ---------          -----------       -----------
(as a percentage of average net assets)

      Management Fees...................................................    .50%               .50%               .50%
      12b-1 Fees........................................................    .22%              1.00%*             1.00%*
      Other Expenses....................................................    .51%               .51%               .51%
                                                                           -----              -----              -----
      Total Series Operating Expenses...................................   1.23%              2.01%              2.01%
                                                                           =====              =====              =====
    
</TABLE>

   
     The  purpose  of this table is to assist  investors  in  understanding  the
various  costs and expenses  which  shareholders  of the Series bear directly or
indirectly.  The sales load on Class A shares is a one-time  charge  paid at the
time of purchase of shares.  Reductions  in initial sales loads are available in
certain  circumstances.  The  CDSLs on Class B and Class D shares  are  one-time
charges  paid  only if  shares  are  redeemed  within  six  years or one year of
purchase,  respectively. Class A shares are not subject to an initial sales load
for  purchases  of  $1,000,000  or more;  however,  such shares are subject to a
contingent  deferred  sales  load,  a  one-time  charge,  only if the shares are
redeemed  within eighteen months of purchase.  For more  information  concerning
reductions  in sales loads and for a more  complete  description  of the various
costs and  expenses,  see  "Purchase  of  Shares",  "Redemption  of Shares"  and
"Management Services" herein. The Series'  Administration,  Shareholder Services
and  Distribution  Plan to which the caption "12b-1 Fees" relates,  is discussed
under  "Administration,  Shareholder  Services and  Distribution  Plan"  herein.

    
<TABLE>
<CAPTION>
EXAMPLE                                                                        1 YEAR     3 YEARS     5 YEARS    10 YEARS
- -------                                                                        ------     -------     -------    --------
<S>                                                                  <C>         <C>         <C>        <C>         <C> 
   
An investor  would pay the following  expenses on a $1,000
  investment,  assuming (1) 5% annual return and (2)
  redemption at the end of each time period.......................   Class A     $59         $85        $112        $189
                                                                     Class B+     70          93         128         214
                                                                     Class D      30          63         108         234
An investor would pay the following expenses on the same
   investment, assuming no redemption...........................     Class A     $59         $85        $112        $189
                                                                     Class B+     20          63         108         214
                                                                     Class D      20          63         108         234
</TABLE>
    

THE  EXAMPLE  SHOULD  NOT BE  CONSIDERED  A  REPRESENTATION  OF PAST  OR  FUTURE
EXPENSES.  ACTUAL  EXPENSES  MAY BE GREATER OR LESS THAN THOSE  SHOWN AND THE 5%
ANNUAL RETURN USED IN THIS EXAMPLE IS A HYPOTHETICAL RATE.

   
- ----------
  *Includes  an annual  distribution  fee of .75% and an annual  service  fee of
   .25%.  Pursuant  to the  Rules  of the  National  Association  of  Securities
   Dealers, Inc. the aggregate deferred sales loads and annual distribution fees
   on Class B and Class D shares of the  Series  may not  exceed  6.25% of total
   gross sales, subject to certain exclusions.  The maximum sales charge rule is
   applied  separately  for each class.  The 6.25%  limitation is imposed on the
   Series rather than on a per shareholder basis. Therefore, a long-term Class B
   or Class D  shareholder  of the  Series  may pay more in  total  sales  loads
   (including  distribution fees) than the economic  equivalent of 6.25% of such
   shareholder's investment in such shares.

  +The expenses shown for the ten-year  period reflect the conversion of Class B
   shares to Class A shares after 8 years.
    
                                       2

<PAGE>


                              FINANCIAL HIGHLIGHTS

     The  financial  highlights  for the  Series'  Class A,  Class B and Class D
shares for the periods  presented  below have been  audited by Deloitte & Touche
LLP, independent auditors. This information, which is derived from the financial
and  accounting  records of the Series  should be read in  conjunction  with the
financial statements and notes contained in the Fund's 1997 Annual Report, which
is incorporated by reference in the Fund's Statement of Additional  Information,
copies of which may be obtained  free of charge  from the Fund at the  telephone
numbers or address provided on the cover page of this Prospectus.

     "Per share  operating  performance"  data is designed to allow investors to
trace the operating  performance,  on a per share basis,  from the beginning net
asset  value to the  ending  net asset  value so that they can  understand  what
effect the  individual  items  have on their  investment,  assuming  it was held
throughout  the  period.  Generally,  the  per  share  amounts  are  derived  by
converting the actual dollar amounts incurred for each item, as disclosed in the
financial statements, to their equivalent per share amount.

     "Total  return based on net asset value"  measures the Class's  performance
assuming  investors  purchased shares of the Series at the net asset value as of
the  beginning of the period,  invested  dividends and capital gains paid at net
asset  value and then sold their  shares at the net asset value per share on the
last day of the period.  The total return  computations do not reflect any sales
loads  investors may incur in purchasing or selling shares of the Series.  Total
returns for periods of less than one year are not annualized.
<TABLE>
<CAPTION>

                                                                         CLASS A

                              ------------------------------------------------------------------------------------------
                                                                 YEAR ENDED DECEMBER 31,
                              ------------------------------------------------------------------------------------------
                                1997      1996    1995     1994      1993     1992    1991     1990      1989      1988
                              -------   ------- -------  -------   -------  ------- -------  --------  -------   -------
<S>                            <C>     <C>      <C>       <C>      <C>     <C>       <C>      <C>       <C>      <C>    
   
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning
  of year ..................   $ 6.71    $ 7.15  $ 6.47   $ 7.18    $ 7.19   $ 7.30  $ 6.89    $ 7.04   $ 7.06   $  7.12
                              -------   ------- -------  -------   -------  ------- -------  --------  -------   -------
Net investment income ......      .38       .41     .46      .44       .53      .51     .51       .59      .65       .60
Net realized and unrealized
  investment gain (loss) ...      .17      (.44)    .68     (.71)     (.01)    (.11)    .41      (.15)    (.02)     (.06)
                              -------   ------- -------  -------   -------  ------- -------  --------  -------   -------
Increase (decrease) from
  investment operations ....      .55      (.03)   1.14     (.27)      .52      .40     .92       .44      .63       .54
Dividends paid or declared .     (.38)     (.41)   (.46)    (.44)     (.53)    (.51)   (.51)     (.59)    (.65)     (.60)
                              -------   ------- -------  -------   -------  ------- -------  --------  -------   -------
Net increase (decrease) in 
  net asset value ..........      .17      (.44)    .68     (.71)     (.01)    (.11)    .41      (.15)    (.02)     (.06)
                              -------   ------- -------  -------   -------  ------- -------  --------  -------   -------
Net asset value, end of year   $ 6.88    $ 6.71  $ 7.15   $ 6.47    $ 7.18   $ 7.19  $ 7.30    $ 6.89   $ 7.04    $ 7.06
                              =======   ======= =======  =======   =======  ======= =======   ======= ========   =======
TOTAL RETURN BASED ON
  NET ASSET VALUE: .........     8.53%    (0.29)% 18.15%   (3.88)%    7.46%    5.78%  14.05%     6.37%    9.25%     7.84%
RATIOS/SUPPLEMENTAL DATA:
Expenses to average net assets   1.23%     1.14%   1.14%    1.10%     1.11%    1.05%   1.10%     1.06%    1.09%     1.09%
Net investment income to 
  average net assets .......     5.68%     6.05%   6.71%    6.49%     7.22%    7.17%   7.39%     8.66%    9.16%     8.33%
Portfolio turnover .........   193.90%   175.25% 213.06%  445.18%   170.35%  126.17%  95.46%   306.05%  226.25%   263.15%
Net assets, end of year
  (000s omitted) ...........   $45,426   $46,889 $55,061  $54,714   $69,805  $55,732 $64,440   $71,735  $83,850  $106,720
    
</TABLE>

                                       3

<PAGE>


   
                        FINANCIAL HIGHLIGHTS (continued)
    
<TABLE>
<CAPTION>

                                     CLASS B                               CLASS D
                                    ---------     --------------------------------------------    ---------
                                     1/1/97*                       YEAR ENDED                      9/21/93*
                                       TO                         DECEMBER 31,                        TO
                                    --------      --------------------------------------------     --------
                                    12/31/97       1997        1996         1995        1994       12/31/93
                                    --------      -------     -------      -------     -------     --------
<S>                                  <C>         <C>          <C>         <C>          <C>         <C>   
   
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning 
  of period                          $ 6.73      $ 6.73       $ 7.16      $ 6.48       $ 7.20      $ 7.33
                                    -------     -------      -------     -------      -------     -------
Net investment income                   .33         .33          .36         .40          .37         .09
Net realized and unrealized
  investment gain (loss)                .16         .16        (.43)         .68         (.72)       (.13)
                                    -------     -------      -------     -------      -------     -------
Increase (decrease) from 
  investment operations                 .49         .49         (.07)       1.08         (.35)       (.04)
Dividends paid or declared             (.33)       (.33)        (.36)       (.40)        (.37)       (.09)
                                    -------     -------      -------     -------      -------     -------
Net increase (decrease) in net 
  asset value                           .16         .16         (.43)        .68         (.72)       (.13)
                                    -------     -------      -------     -------      -------     -------
Net asset value, end of period       $ 6.89      $ 6.89       $ 6.73      $ 7.16       $ 6.48      $ 7.20
                                    =======     =======      =======     =======      =======     =======
TOTAL RETURN BASED ON NET ASSET
   VALUE:                              7.32%       7.53%        (0.92)%    17.10%       (5.05)%     (0.65)%
RATIOS/SUPPLEMENTAL DATA:
Expenses to average net assets         2.01%       2.01%        1.92%       2.01%        2.22%       2.09%+
Net investment income to average
  net assets                           4.90%       4.90%        5.27%       5.84%        5.40%       5.28%+
Portfolio turnover                   193.90%     193.90%      175.25%     213.06%      445.18%     170.35%++
Net assets, end of period
  (000s omitted)                      $3,219     $12,350       $9,283      $8,181       $6,062      $2,317
    
</TABLE>

- ----------
  *Commencement of offering of shares. 

  +Annualized.

 ++For the year ended December 31, 1993.

                                       4
<PAGE>

ALTERNATIVE DISTRIBUTION SYSTEM

     The Series  offers  three  classes  of  shares.  Class A shares are sold to
investors who have concluded that they would prefer to pay an initial sales load
and have  the  benefit  of lower  continuing  fees.  Class B shares  are sold to
investors choosing to pay no initial sales load, a higher distribution fee and a
CDSL with  respect to  redemptions  within six years of purchase  and who desire
shares to convert  automatically  to Class A shares after eight  years.  Class D
shares are sold to  investors  choosing to pay no initial  sales load,  a higher
distribution fee and, with respect to redemptions within one year of purchase, a
CDSL. The Alternative  Distribution System allows investors to choose the method
of  purchasing  shares  that is most  beneficial  in light of the  amount of the
purchase,  the  length  of time the  shares  are  expected  to be held and other
relevant   circumstances.   Investors  should  determine   whether  under  their
particular  circumstances it is more advantageous to incur an initial sales load
and be subject to lower ongoing fees, as discussed  below, or to have the entire
initial  purchase price  invested in the Series with the  investment  thereafter
being  subject to higher  ongoing  fees and either a CDSL for a six-year  period
with  automatic  conversion  to Class A shares after eight years or a CDSL for a
one-year period with no automatic conversion to Class A shares.

     Investors who expect to maintain their investment for an extended period of
time might choose to purchase Class A shares  because over time the  accumulated
continuing  distribution  fees of Class B and  Class D  shares  may  exceed  the
initial sales load and lower ongoing fee of Class A shares.  This  consideration
must be weighed  against the fact that the amount invested in the Series will be
reduced  by the  initial  sales load on Class A shares  deducted  at the time of
purchase.  Furthermore,  the  higher  distribution  fees on Class B and  Class D
shares  will be offset to the extent any return is  realized  on the  additional
funds initially invested therein that would have been equal to the amount of the
initial sales load on Class A shares.

     Investors who qualify for reduced  initial sales loads,  as described under
"Purchase of Shares" below, might also choose to purchase Class A shares because
the initial sales load deducted at the time of purchase would be less.  However,
investors  should  consider the effect of the 1% CDSL imposed on shares on which
the initial sales load was waived because the amount of Class A shares purchased
was $1,000,000 or more. In addition, Class B shares will be converted into Class
A shares after a period of approximately  eight years, and thereafter  investors
will be subject to lower ongoing fees. Shares purchased through  reinvestment of
dividends and distributions on Class B shares also will convert automatically to
Class A shares along with the underlying shares on which they were earned.

     Alternatively,  some  investors  might  choose  to have all of their  funds
invested initially in Class B or Class D shares, although remaining subject to a
higher  continuing  distribution  fee and, for a six-year or one-year  period, a
CDSL as  described  below.  For  example,  an investor  who does not qualify for
reduced  sales  loads would have to hold Class A shares for more than 6.33 years
for the Class B or Class D  distribution  fee to exceed the  initial  sales load
plus the  distribution  fee on Class A shares.  This  example does not take into
account the time value of money, which further reduces the impact of the Class B
and Class D shares' 1% distribution  fee, other expenses  charged to each class,
fluctuations  in net asset  value or the effect of the return on the  investment
over this period of time.

     Investors  should bear in mind that the total  asset  based  sales  charges
(i.e., the higher  continuing  distribution fee plus the CDSL) on Class B shares
that are redeemed  may exceed the total asset based sales  charges that would be
payable  on the same  amount of Class A or Class D shares,  particularly  if the
Class B shares are redeemed shortly after purchase or if the investor  qualifies
for a reduced sales load on the Class A shares.

     Investors  should  understand  that the purpose and function of the initial
sales load (and deferred sales load,  when  applicable)  with respect to Class A
shares is the same as those of the deferred sales loads and higher  distribution
fees with  respect  to Class B and  Class D shares  in that the sales  loads and
distribution  fees  applicable  to each class  provide for the  financing of the
distribution of the shares of the Series.

                                       5
<PAGE>


     Class B and Class D shares  are  subject to the same  ongoing  distribution
fees but Class D shares are subject to a CDSL for a shorter  period of time (one
year as opposed  to six years)  than  Class B shares.  However,  unlike  Class D
shares,  Class B shares  automatically  convert  to Class A  shares,  which  are
subject to lower ongoing fees.

     The three classes of shares  represent  interests in the same  portfolio of
investments,  have the same rights and are  generally  identical in all respects
except that each class bears its separate distribution and, potentially, certain
other class expenses and has exclusive  voting rights with respect to any matter
to which a separate vote of any class is required by the Investment  Company Act
of 1940,  as amended  (the "1940  Act"),  or  Massachusetts  law. The net income
attributable  to each  class and  dividends  payable on the shares of each class
will be reduced by the amount of distribution  and other expenses of each class.
Class B and Class D shares bear higher  distribution  fees, which will cause the
Class B and Class D shares to pay lower  dividends than the Class A shares.  The
three classes also have separate exchange privileges.

     The  Trustees of the Fund  believe  that no conflict of interest  currently
exists  between  the Class A,  Class B and Class D shares of the  Series.  On an
ongoing basis, the Trustees, in the exercise of their fiduciary duties under the
1940 Act and  Massachusetts  law,  will  seek to  ensure  that no such  conflict
arises. For this purpose, the Trustees will monitor the Series for the existence
of any  material  conflict  among the  classes  and will take such  action as is
reasonably necessary to eliminate any such conflicts that may develop.

     DIFFERENCES BETWEEN CLASSES. The primary differences between Class A, Class
B and Class D shares are their sales load structures and ongoing expenses as set
forth below. The primary differences between Class B and Class D shares are that
Class D shares are  subject to a shorter  CDSL  period and a lower CDSL rate but
Class B  shares  automatically  convert  to Class A shares  after  eight  years,
resulting in a reduction  in ongoing  fees.  Investors in Class B shares  should
take into account  whether  they intend to redeem  their shares  within the CDSL
period and, if not,  whether they intend to remain invested until the end of the
conversion  period and thereby take  advantage of the  reduction in ongoing fees
resulting from the conversion to Class A shares.  Other investors,  however, may
elect to purchase Class D shares if they determine  that it is  advantageous  to
have all their assets invested initially and they are uncertain as to the length
of time they intend to hold their assets in the Series or another mutual fund in
the Seligman Group for which the exchange privilege is available. Although Class
D shareholders  are subject to a shorter CDSL period at a lower rate, they forgo
the Class B automatic  conversion  feature,  making their investment  subject to
higher  distribution  fees for an  indefinite  period  of time.  Each  class has
advantages  and  disadvantages  for different  investors,  and investors  should
choose the class that best suits their circumstances and their objectives.

   
                              ANNUAL 12B-1 FEES
         INITIAL              (AS A % OF AVERAGE
         SALES LOAD           DAILY NET ASSETS)         OTHER INFORMATION
         ----------           ---------------           ---------------
CLASS A  Maximum initial      Service fee of            Initial sales load
         sales load of        .25%.                     waived or reduced
         4.75% of the                                   for certain
         public offering                                purchases.
         price.                                         CDSL of 1%
                                                        on redemptions
                                                        within 18 months
                                                        of purchase on
                                                        shares on which
                                                        initial sales load was
                                                        waived in full due to
                                                        the size of purchase.
    

CLASS B  None                 Service fee of            CDSL of:
                              .25%; Distribution        5% in 1st year
                              fee of .75% until         4% in 2nd year
                              conversion.*              3% in 3rd and
                                                        4th  years
                                                        2% in 5th  year
                                                        1% in 6th year
                                                        0% after 6th year.

CLASS D  None                 Service fee of            CDSL of 1% on
                              .25%; Distribution        redemptions
                              fee of up to .75%.        within one year of
                                                        purchase.


*Conversion occurs at the end of the month which precedes the 8th anniversary of
 the purchase  date.  If Class B shares of the Series are  exchanged for Class B
 shares of another Seligman Mutual Fund, the conversion period applicable to the
 Class B shares  acquired in the exchange will apply,  and the holding period of
 the  shares  exchanged  will be tacked  onto the  holding  period of the shares
 acquired.

                                       6

<PAGE>

INVESTMENT OBJECTIVE, POLICIES AND RISKS

     The Fund is a diversified open-end management  investment company organized
under the laws of the  Commonwealth of  Massachusetts  by a Declaration of Trust
dated July 27, 1984. The Fund offers one other separate  investment  series: the
Seligman   High-Yield  Bond  Series.  The  High-Yield  Bond  Series'  investment
objective  and  policies  and other  important  information  with respect to its
operations are set forth in a separate Prospectus.

     The objective of the Series is to produce high current  income.  The Series
seeks to achieve its  objective  by  investing  at least 80% of the value of its
total assets in direct obligations of the U.S. Treasury, such as Treasury Bills,
Treasury Notes and Treasury Bonds,  and in debt securities  issued or guaranteed
by the U.S. Government, its agencies or instrumentalities and backed by the full
faith and credit of the U.S.  Government which have maturities  greater than one
year at the date of  purchase  by the  Series,  except for  temporary  defensive
purposes.  This investment policy is a fundamental policy and may not be changed
by the  Trustees  of the Fund  without  the vote of a  majority  of the  Series'
outstanding voting securities (as defined below). There can be no assurance that
the Series' investment objective will be obtained.

     The Series may invest up to 20% of the value of its total  assets in direct
obligations of the U.S.  Treasury and in securities  issued or guaranteed by the
United  States  Government,   its  agencies  or  instrumentalities   which  have
maturities  of less  than  one  year  at the  date of  purchase  by the  Series.
Obligations  issued by U.S.  Government  agencies include  obligations issued by
such entities as Federal Land Banks,  Federal Home Loan Banks and the Government
National  Mortgage  Association   ("GNMA").   "GNMA  Certificates"  or  "GNMAs,"
represent  interests in pools of  residential  mortgages.  The timely payment of
principal  and interest is  guaranteed  by GNMA and backed by the full faith and
credit of the U.S. Government.  GNMAs differ from other forms of debt securities
which  normally  provide for periodic  payment of interest in fixed amounts with
principal payments at maturity or specified call dates. Instead, GNMAs provide a
"pass  through"  of monthly  payments  of  interest  and  principal  made by the
borrowers on their residential mortgage loans, net of certain expenses. A pool's
stated  maturity may be shortened by  prepayments of principal on the underlying
mortgage  obligations.  Factors affecting mortgage  prepayments  include,  among
other  things,  the  level  of  interest  rates,  general  economic  and  social
conditions  and the  location  and age of the  mortgage.  Such  prepayments  may
shorten the effective  maturity of GNMAs.  High interest rate mortgages are more
likely to be prepaid  than lower rate  mortgages;  consequently,  the  effective
maturities  of GNMAs with pass  through  payments of higher rate  mortgages  are
likely to be shorter than those of  obligations  with pass  through  payments of
lower rate mortgages.

   
     RISK FACTORS. U.S. government securities are considered among the safest of
fixed-income investments; however, their market values, like those of other debt
securities,  will fluctuate with changes in interest rates.  The net asset value
of the Series'  shares will  fluctuate  with  changes in the market value of its
portfolio  securities  and the Series' yield will vary based on the yield of its
portfolio  securities.  Generally,  as interest rates decline,  the value of the
U.S.  government  securities  held by the Series will increase.  Conversely,  if
interest  rates  rise,  the  value of the  securities  held by the  Series  will
decline.  This effect is usually more  pronounced  for  longer-term  securities,
which  generally tend to produce higher yields but are subject to greater market
fluctuations  as a result of changes in interest rates than debt securities with
shorter  maturities.  Neither  the  Series'  net  asset  value  nor its yield is
guaranteed by the U.S. government.

     Mortgage-backed  securities  in which the Series  invests may benefit  less
than other fixed-income  securities from declining interest rates because of the
risk of  prepayment.  Although the extent of  prepayments  on a pool of mortgage
loans depends on various  factors,  including the prevailing  interest rates and
general economic conditions,  mortgage  prepayments  generally increase during a
period of declining  interest  rates and decrease  with rising  interest  rates.
Prepayments  in-
    

                                       7
<PAGE>


   
crease the amounts  available  for  reinvestment  by the Series and such amounts
would have to be reinvested at lower interest rates. In addition, prepayments on
underlying  mortgages result in a loss of anticipated  interest,  and the actual
yield to the Series may be different than the quoted yield on the securities. As
a result,  when  interest  rates  are  declining,  the value of  mortgage-backed
securities  may not  increase  as  much  as  other  fixed-income  securities  of
comparable  maturities,  although  they may have a similar  risk of decline when
interest rates rise.

     YEAR 2000 RISKS.  The Series is dependent upon service  providers and their
computer systems for its day-to-day operations,  and many of the Series' service
providers in turn depend upon computer  systems of other persons.  Many computer
systems   currently   cannot  properly   recognize  or  process  date  sensitive
information  relating  to the  year  2000  and  beyond.  The  Manager,  Seligman
Financial  Services,  Inc., and the Series'  custodian have been  evaluating the
impact the year 2000 issue may have on their computer systems.  They expect that
any  modifications to their computer systems  necessary to address the year 2000
issue will be made and tested in a timely  manner.  They are also  working  with
vendors  and  other  persons  whose  systems  are  linked  to  theirs  to obtain
satisfactory  assurances  regarding  the year 2000 issue.  Seligman  Data Corp.,
which provides certain corporate and shareholder  account services to the Series
at cost,  has  informed  the Series that it does not expect that the cost to the
Series of its services will increase materially as a result of the modifications
to its computer  systems  necessary  to prepare for the year 2000.  The costs of
systems  remediation by persons other than Seligman Data Corp. will not be borne
directly by the Series.  There can be no  assurance  that the  remedial  actions
taken by the Series' service providers will be sufficient or timely.  Inadequate
remediation  could have an adverse effect on the Series'  operations,  including
pricing and securities trading and settlement,  and the provision of shareholder
services.
    

     LENDING OF PORTFOLIO  SECURITIES.  The Series may lend portfolio securities
to brokers or dealers,  banks, or other  institutional  borrowers of securities.
The borrower must maintain with the Series cash or equivalent collateral such as
Treasury  Bills,  equal to at least 100% of the market  value of the  securities
loaned.  During the time portfolio securities are on loan, the borrower pays the
Series any income  accruing on the loaned  securities  and the Series may invest
the cash  collateral  and earn  additional  income or may receive an agreed upon
amount of interest income from the borrower. The lending of portfolio securities
may involve  certain  risks such as: 1) an  increase in the market  value of the
borrowed securities without a corresponding  increase in the value of the posted
collateral might result in an imbalance in value between the borrowed securities
and the  collateral;  2) in the event the borrower sought  protection  under the
Federal bankruptcy laws,  repayment of the borrowed securities to the Fund might
be delayed;  and 3) the borrower might refuse to repay the borrowed  securities.
The Series may lend  portfolio  securities  to the extent that the Manager deems
appropriate in seeking to achieve the Series' investment objective and with only
a prudent degree of risk.

     REPURCHASE AGREEMENTS. The Series may enter into repurchase agreements with
commercial banks and with  broker/dealers  to invest cash for the short-term.  A
repurchase  agreement  is an agreement  under which the Series  acquires a money
market instrument, generally a U.S. Government obligation qualified for purchase
by the Series,  subject to resale at an agreed upon price and date.  Such resale
price reflects an agreed upon interest rate effective for the period of time the
instrument  is held by the Series and is unrelated  to the interest  rate on the
instrument.  Repurchase  agreements  could involve certain risks in the event of
bankruptcy  or other  default  by the  seller,  including  possible  delays  and
expenses in  liquidating  the securities  underlying  the agreement,  decline in
value of the underlying  securities and loss of interest.  Repurchase agreements
usually are for short  periods,  such as one week or less, but may be for longer
periods.  Although the Series may enter into repurchase  agreements with respect
to  any  money  market  instruments  qualified  for  purchase,  such  agreements
generally involve U.S.  Government  securities and

                                       8
<PAGE>

will only involve securities issued or guaranteed by the U.S.  Government.  As a
matter  of  fundamental  policy,  the  Series  will not  enter  into  repurchase
agreements of more than one week's duration if more than 10% of its total assets
would be  invested  in such  agreements  and in  restricted  and other  illiquid
securities.

     WHEN-ISSUED SECURITIES. The Series may purchase securities on a when-issued
basis,  in which case  delivery and payment  normally  take place within 45 days
after the date of the  commitment to purchase.  The payment  obligation  and the
interest rate that will be received on the securities are each fixed at the time
the buyer enters into the  commitment.  Although the Series will only purchase a
security on a  when-issued  basis with the  intention of actually  acquiring the
securities,  the Series may sell these securities before the purchase settlement
date if it is deemed advisable.

     Securities  held by the Series and  securities  purchased on a  when-issued
basis are subject to changes in market value based upon  investors'  perceptions
of the creditworthiness of the issuer and upon changes, real or anticipated,  in
the level of interest rates. If the Series remains  substantially fully invested
at the same time that it has purchased  securities on a when-issued  basis,  the
market value of the Series' assets may fluctuate  more than  otherwise  would be
the case.  Purchasing a security on a when-issued  basis can involve a risk that
the yields  available in the market when the delivery  takes place may be higher
than those obtained on the security so purchased.

     An account  for the Series  consisting  of cash or liquid  high-grade  debt
securities  equal  to  the  amount  of  the  when-issued   commitments  will  be
established  with the  Series'  Custodian,  and  marked  to market  daily,  with
additional cash or liquid high-grade debt securities added when necessary.  When
the time  comes to pay for  when-issued  securities,  the  Series  will meet its
respective obligations from then available cash flow, sale of securities held in
the separate  account,  sale of other  securities  or,  although  they would not
normally expect to do so, from the sale of the when-issued securities themselves
(which may have a value greater or less than the Series'  payment  obligations).
Sale of securities to meet such obligations  carries with it a greater potential
for the realization of capital gain or loss.

     GENERAL.   Except  as  noted  above  or  in  the  Statement  of  Additional
Information,  the  foregoing  investment  policies are not  fundamental  and the
Trustees of the Fund may change such policies  without the vote of a majority of
the  outstanding  voting  securities of the Series.  As a matter of policy,  the
Trustees  will not change the Series'  investment  objective of  producing  high
current income without such a vote.  Under the 1940 Act a "vote of a majority of
the outstanding  voting  securities" of the Series means the affirmative vote of
the lesser of (1) more than 50% of the  outstanding  shares of the Series or (2)
67% or more of the shares of the Series  present at a  shareholders'  meeting if
more than 50% of the  outstanding  shares of the Series are  represented  at the
meeting in person or by proxy.

       

MANAGEMENT SERVICES

     The Trustees  provide broad  supervision over the affairs of the Series and
the Fund as a whole. Pursuant to a Management Agreement approved by the Trustees
and the  shareholders of the Series,  the Manager manages the investments of the
Series and administers the business and other affairs of the Series. The address
of the Manager is 100 Park Avenue, New York, NY 10017.

     The Manager also serves as manager of seventeen other investment  companies
which,  together with the Fund,  comprise the "Seligman  Group." These companies
are: Seligman Capital Fund, Inc.,  Seligman Cash Management Fund, Inc., Seligman
Common Stock Fund, Inc.,  Seligman  Communications  and Information  Fund, Inc.,
Seligman  Frontier Fund, Inc.,  Seligman Growth Fund, Inc.,  Seligman  Henderson
Global Fund Series,  Inc.,  Seligman Income Fund, Inc.,  Seligman Municipal Fund
Series,  Inc.,  Seligman  Municipal Series Trust,  Seligman New Jersey Municipal
Fund, Inc., Seligman  Pennsylvania  Municipal Fund Series,  Seligman Portfolios,
Inc.,  Seligman Quality  Municipal Fund,  Inc.,  Seligman Select

                                       9
<PAGE>

   
Municipal  Fund,  Inc.,  Seligman  Value Fund Series,  Inc. and  Tri-Continental
Corporation. The aggregate assets of the Seligman Group were approximately $20.2
billion at March 31, 1998.  The Manager also provides  investment  management or
advice to  institutional  and other accounts  having an aggregate value at March
31, 1998 of approximately $7.4 billion.
    

     Mr.  William C. Morris is Chairman of the Manager and Chairman of the Board
and Chief  Executive  Officer of the Fund.  Mr.  Morris  owns a majority  of the
outstanding voting securities of the Manager.

     The  Manager  provides  senior   management  for  Seligman  Data  Corp.,  a
wholly-owned  subsidiary of certain investment  companies in the Seligman Group,
which  performs,  at  cost,  certain  recordkeeping  functions  for the  Series,
maintains the records of  shareholder  accounts and furnishes  dividend  paying,
redemption and related services.

   
     The Manager is entitled to receive a management fee,  calculated  daily and
payable monthly,  equal to .50% of the daily average net assets of the Series on
an annual basis.  The Fund pays all of its expenses  other than those assumed by
the Manager. The Fund's expenses are allocated among the series of the Fund in a
manner  determined by the Trustees to be fair and  equitable.  Total expenses of
the Series' Class A, Class B and Class D shares for the year ended  December 31,
1997 amounted to 1.23%, 2.01% and 2.01%, respectively,  of the average daily net
assets of such class.

     PORTFOLIO MANAGEMENT. Mr. Leonard J. Lovito, Vice President of the Manager,
has been Vice President and Portfolio  Manager of the Series since January 1994.
Mr. Lovito also serves as Vice President and Portfolio  Manager of Seligman Cash
Management  Fund, Inc. and Vice President of Seligman  Portfolios,  Inc. ("SPI")
and Portfolio  Manager of SPI's Seligman Cash Management  Portfolio and Seligman
Bond Portfolio. Mr. Lovito joined the Manager in 1984 as a fixed income trader.

     The Portfolio Manager's  discussion of the Series' performance as well as a
line graph illustrating  comparative  performance information between the Series
and the Lipper General U.S.  Government Bond Funds Average,  Lipper General U.S.
Government  Bond Fund Index and the  Lehman  Brothers  Government  Bond Index is
included in the Series' 1997 Annual Report to  Shareholders.  Copies of the 1997
Annual Report may be obtained,  without charge, by calling or writing the Series
at the telephone numbers or address listed on the cover page of this Prospectus.
    

     PORTFOLIO TRANSACTIONS. Fixed-income securities are generally traded on the
over-the-counter  market on a "net" basis without a stated  commission,  through
dealers acting for their own account and not as brokers.  The Series will engage
in transactions with these dealers or deal directly with the issuer. Prices paid
to dealers will generally  include a "spread," i.e., the difference  between the
prices at which a dealer is willing to purchase or to sell the  security at that
time.  The  Management  Agreement  recognizes  that in the  purchase and sale of
portfolio  securities,  the  Manager  will  seek the most  favorable  price  and
execution  and  consistent  with  that  policy,  may give  consideration  to the
research, statistical and other services furnished by dealers to the Manager for
its use in connection with its services to the Fund as well as to other clients.

     Consistent  with  the  Rules  of the  National  Association  of  Securities
Dealers,  Inc.  and subject to seeking the most  favorable  price and  execution
available and such other policies as the Trustees of the Fund may determine, the
Manager  may  consider  sales of shares of the Series and,  if  permitted  under
applicable  laws,  may consider sales of shares of the other mutual funds in the
Seligman  Group as a factor in the  selection  of  brokers or dealers to execute
portfolio transactions for the Series.

     PORTFOLIO  TURNOVER.  A change in securities held by the Series is known as
"portfolio  turnover"  which may  result in the  payment by the Series of dealer
spreads or underwriting  commissions and other transactions costs on the sale of
securities as well as on the  reinvestment of the

                                       10
<PAGE>

   
proceeds  in  other  securities.  Higher  portfolio  turnover  involves  greater
transactions  costs and a  possible  increase  in  short-term  capital  gains or
losses.  Although  it is the  policy  of  the  Series  to  hold  securities  for
investment,  changes  will be made from time to time when the  Manager  believes
such changes will strengthen the Series' portfolio.  The portfolio turnover rate
will vary from  year to year as well as within a year and has  exceeded  100% in
recent years.
    

PURCHASE OF SHARES

     Seligman Financial  Services,  Inc. ("SFSI"),  an affiliate of the Manager,
acts as general  distributor  of the  Series'  shares.  Its  address is 100 Park
Avenue, New York, NY 10017.

     The Fund  issues  three  classes  of  shares:  Class A  shares  are sold to
investors  choosing the initial sales load alternative;  Class B shares are sold
to investors  choosing to pay no initial sales load, a higher  distribution  fee
and a CDSL with  respect to  redemptions  within six years of  purchase  and who
desire shares to convert  automatically to Class A shares after eight years; and
Class D shares are sold to  investors  choosing no initial  sales load, a higher
distribution  fee and a CDSL on  redemptions  within one year of  purchase.  See
"Alternative Distribution System" above.

   
     Shares of the Series may be  purchased  through any  authorized  investment
dealer.  All  orders  will be  executed  at the net asset  value per share  next
determined  after  receipt of the  purchase  order plus,  in the case of Class A
shares, a sales load which, except for shares purchased under one of the reduced
sales  load  plans,  will  vary  with the size of the  purchase  as shown in the
schedule under "Class A Shares -- Initial Sales Load" below.
    

     THE  MINIMUM  AMOUNT  FOR  INITIAL  INVESTMENT  IN THE  SERIES  IS  $1,000;
SUBSEQUENT  INVESTMENTS  MUST  BE IN THE  MINIMUM  AMOUNT  OF $100  (EXCEPT  FOR
INVESTMENT OF DIVIDENDS AND CAPITAL GAIN  DISTRIBUTIONS).  THE FUND RESERVES THE
RIGHT TO RETURN  INVESTMENTS  WHICH DO NOT MEET THESE  MINIMUMS.  EXCEPTIONS  TO
THESE MINIMUMS ARE AVAILABLE FOR ACCOUNTS BEING  ESTABLISHED  CONCURRENTLY  WITH
THE INVEST-A-CHECK(R)  SERVICE. THE MINIMUM AMOUNT FOR INITIAL INVESTMENT IN THE
SELIGMAN  TIME  HORIZON  MATRIXSM  ASSET  ALLOCATION  PROGRAM  IS  $10,000.  FOR
INFORMATION ABOUT THIS PROGRAM, CONTACT YOUR FINANCIAL ADVISOR.

   
     The  minimum  amount  for  initial  investment  in the  Series  is $500 for
investors  who purchase  shares of the Fund through  Merrill  Lynch's MFA or MFA
Select  programs.  There is no minimum  investment  required for  investors  who
purchase shares of the Series through wrap fee programs.

     Purchase orders placed for Class B shares must be for LESS THAN $250,000.

     Orders received by an authorized  dealer by the close of regular trading on
the New York Stock  Exchange  ("NYSE")  (normally,  4:00 p.m.  Eastern time) and
accepted by SFSI before the close of business  (5:00 p.m.  Eastern  time) on the
same day will be executed at the  Series' net asset value  determined  as of the
close of regular  trading  on the NYSE on that day plus,  in the case of Class A
shares, any applicable sales load. Orders accepted by dealers after the close of
regular  trading on the NYSE,  or received by SFSI after the close of  business,
will be executed at the Series' net asset value as next determined  plus, in the
case of Class A shares, any applicable sales load. The authorized dealer through
which a shareholder  purchases shares is responsible for forwarding the order to
SFSI promptly.
    

     Payment  for  dealer  purchases  may be made by check  or by wire.  To wire
payment,  dealer  orders  must  first be placed  through  SFSI's  order desk and
assigned a purchase  confirmation  number.  Funds in payment of the purchase may
then be wired to Mellon Bank, N.A., ABA #043000261, A/C Seligman U.S. Government
Securities  Series (A, B or D), A/C  #107-1011.  WIRE TRANSFERS MUST INCLUDE THE
PURCHASE CONFIRMATION NUMBER AND CLIENT ACCOUNT REGISTRATION AND ACCOUNT NUMBER.
Persons other than dealers who wish to wire payment should contact

                                       11
<PAGE>

Seligman Data Corp. for specific wire  instructions.  Although the Fund makes no
charge for this service, the transmitting bank may impose a wire service fee.

   
     Current  shareholders may purchase  additional shares of the Series through
any  authorized  dealer or by sending a check payable to the "Seligman  Group of
Funds"  in our  postage-paid  return  envelope  or  directly  to P.O.  BOX 9766,
PROVIDENCE,  RI 02940-9766.  Checks for investment must be in U.S. dollars drawn
on a domestic  bank.  The check  should be  accompanied  by an  investment  slip
(provided  on the bottom of  shareholder  account  statements  or with  periodic
reports) and include the shareholder's  name,  address,  account number, name of
Series and class of shares (A, B or D).  Checks sent  directly to Seligman  Data
Corp. and received in good order will be invested at the Series' net asset value
determined  as of the close of regular  trading on the NYSE on that day plus, in
the case of Class A shares, any applicable sales load.

     IF A SHAREHOLDER DOES NOT PROVIDE THE REQUIRED  INFORMATION,  SELIGMAN DATA
CORP. WILL SEEK FURTHER  CLARIFICATION  AND MAY BE FORCED TO RETURN THE CHECK TO
THE SHAREHOLDER.  IF ONLY THE CLASS DESIGNATION IS MISSING,  THE INVESTMENT WILL
AUTOMATICALLY BE MADE IN CLASS A SHARES FOR NEW ACCOUNTS OR IN THE SHAREHOLDER'S
EXISTING  CLASS FOR ADDITIONAL  PURCHASES.  Credit card  convenience  checks and
third  party  checks  (i.e.,  checks  made  payable  to  someone  other than the
"Seligman  Group  of  Funds")  may not be used to  open a new  fund  account  or
purchase additional shares of the Series.

     Seligman Data Corp. may charge a $10.00 service fee for checks  returned to
it as uncollectable. This charge may be deducted from the shareholder's account.
For the protection of the Fund and its shareholders, no redemption proceeds will
be remitted to a shareholder  with respect to shares  purchased by check (unless
certified) until Seligman Data Corp. receives notice that the check has cleared,
which may be up to 15 days from the  credit of the  shares to the  shareholder's
account.

     Current  shareholders may also purchase  additional  shares by having funds
electronically  transferred  directly  from an employer,  the  Internal  Revenue
Service or other government  agency, or any institution  capable of transmitting
payments through the Automated Clearing House ("ACH") network.  Purchases may be
one-time  transactions,  or, for those  institutions  that offer direct  deposit
programs,  may be made on a  systematic  basis.  To utilize  this  service,  the
following bank information must be provided to the paying institution:

                                Mellon Bank, N.A.
                                 ABA #043000261
                            A/C No. 600FFFNNNNNNNNNN

     "600"  IDENTIFIES  THE  SELIGMAN  GROUP OF  FUNDS,  "FFF" IS THE FUND  CODE
REPRESENTING  THE FUND AND CLASS OF SHARES IN WHICH THE PURCHASE  SHOULD BE MADE
(this code is available on the back of all shareholder account statements),  AND
"NNNNNNNNNN" INDICATES THE SHAREHOLDER'S  TEN-DIGIT ACCOUNT NUMBER. In addition,
the  shareholder  must indicate that this is a checking  account at Mellon Bank.
For  IRA  and  group  retirement  accounts,  all  electronic  purchases  will be
designated  as  current  year  contributions.  For more  information  about this
service, please contact Seligman Data Corp.

     VALUATION.  The net asset value of the Series'  shares is  determined  each
day,  Monday  through  Friday,  as of the close of  regular  trading on the NYSE
(normally,  4:00  p.m.  Eastern  time)  on each  day  that  the NYSE is open for
business.  Net asset value is calculated  separately for each class.  Securities
are  valued  at  market  value  or, in the  absence  thereof,  at fair  value as
determined  in
    

                                       12
<PAGE>

accordance with procedures approved by the Fund's Trustees.  Short-term holdings
maturing  in 60 days or less are  valued  at  amortized  cost if their  original
maturity was 60 days or less and securities  purchased with maturities in excess
of 60 days  which  currently  have  maturities  of 60 days or less are valued by
amortizing their fair market value on the 61st day prior to maturity.

     Although  the  legal  rights  of Class A,  Class B and  Class D shares  are
substantially  identical, the different expenses borne by each class will result
in different net asset values and dividends.  The net asset value of Class B and
Class D shares  will  generally  be lower  than the net  asset  value of Class A
shares as a result of the higher  distribution fees charged to Class B and Class
D shares.

     CLASS A  SHARES--INITIAL  SALES  LOAD.  Class A shares  are  subject  to an
initial  sales load which  varies with the size of the  purchase as shown in the
following schedule, and an annual service fee of up to .25% of the average daily
net asset value of Class A shares. See "Administration, Shareholder Services and
Distribution Plan" below.

- --------------------------------------------------------------------------------
                       CLASS A SHARES--SALES LOAD SCHEDULE

                                                    
   
                                 SALES LOAD AS A    REGULAR   
                                  PERCENTAGE OF      DEALER   
                               ------------------   DISCOUNT  
                                       NET AMOUNT     AS A    
                                        INVESTED      %OF
                              OFFERING (NET ASSET  OFFERING
  AMOUNT OF PURCHASE            PRICE    VALUE)      PRICE
  -----------------------      -------  ---------   -------
  Less than  $      50,000      4.75%     4.99%     4.25%
  $     50,000-     99,999      4.00      4.17      3.50
       100,000-    249,999      3.50      3.63      3.00
       250,000-    499,999      2.50      2.56      2.25
       500,000-    999,999      2.00      2.04      1.75
     1,000,000-   or more*         0         0         0
    

 *Shares  acquired at net asset value  pursuant  to the above  schedule  will be
  subject  to a CDSL  of 1% if  redeemed  within  18  months  of  purchase.  See
  "Purchase of Shares--Contingent Deferred Sales Load."
- --------------------------------------------------------------------------------

     There is no initial sales load on purchases of Class A shares of $1,000,000
or more ("NAV  sales");  however,  such  shares  are  subject to a CDSL of 1% if
redeemed within eighteen months of purchase.

     SFSI shall pay broker/dealers,  from its own resources, a fee on NAV sales,
calculated  as follows:  1.00% of NAV sales up to but not  including $2 million;
 .80% of NAV sales from $2 million up to but not  including  $3 million;  .50% of
NAV sales from $3 million up to but not  including  $5 million;  and .25% of NAV
sales from $5 million  and above.  The  calculation  of the fee will be based on
assets held by a "single person" as defined below.

   
     SFSI shall also pay broker/dealers, from its own resources, a fee on assets
of certain Class A shares of the Seligman  Mutual  Funds,  including the Series,
participating  in an "eligible  employee  benefit  plan" (as defined below under
"Special Programs") that are attributable to the particular  broker/dealer.  The
shares  eligible  for the fee are those on which an  initial  sales load was not
paid because  either the  participating  eligible  employee  benefit plan has at
least (i)  $500,000  invested in the  Seligman  Group of Mutual Funds or (ii) 50
eligible  employees  to  whom  such  plan  is made  available.  Class  A  shares
representing  only an initial  purchase of Seligman Cash Management Fund are not
eligible for the fee. Such shares will become eligible for the fee once they are
exchanged for shares of another  Seligman  Mutual Fund.  The payment is based on
cumulative sales for each Plan during a calendar year, or portion  thereof.  The
payment  schedule,  for each calendar year, is as follows:  1.00% of sales up to
but not  including  $2  million;  .80% of sales  from $2  million  up to but not
including $3 million;  .50% of sales from $3 million up to but not  including $5
million; and .25% of sales from $5 million and above.
    

     REDUCED  SALES LOADS.  Reductions in initial sales loads apply to purchases
of Class A shares by a "single  person,"  including an individual,  members of a
family unit comprising husband,  wife, and minor children purchasing  securities
for their own account,  or a trustee or other fiduciary  purchasing for a single
fiduciary  account  or  single  trust.  Purchases  made by a  trustee  or  other
fiduciary for a fiduciary  account may not be aggregated  with purchases made on
behalf of any other fiduciary or individual account.

                                       13
<PAGE>

     Shares purchased without an initial sales load in accordance with the sales
load schedule or pursuant to a Volume Discount,  Right of Accumulation or Letter
of Intent are subject to a CDSL of 1% on redemptions  within  eighteen months of
purchase.

     o VOLUME DISCOUNTS are provided if the total amount being invested in Class
A shares of the Series alone,  or in any  combination  of shares of the Seligman
Mutual Funds that are sold with an initial sales load,  reaches levels indicated
in the above sales load schedule.

   
     o THE RIGHT OF ACCUMULATION  allows an investor to combine the amount being
invested in shares of any Seligman  Mutual Fund sold with an initial  sales load
with the total net asset  value of shares  already  owned that were sold with an
initial sales load,  including shares of Seligman Cash Management Fund that were
acquired  by the  investor  through an  exchange  of shares of another  Seligman
Mutual Fund on which there was an initial sales load, to determine reduced sales
loads in  accordance  with the sales  load  schedule.  An  investor  or a dealer
purchasing  shares on behalf of any investor must indicate that the investor has
existing accounts when making investments or opening new accounts.

     o A LETTER OF INTENT  allows an investor to purchase  Class A shares of the
Series over a 13-month period at reduced initial sales loads, based on the total
amount of shares the investor intends to purchase plus the total net asset value
of shares of the other  Seligman  Mutual Funds already owned that were sold with
an initial  sales load and the total net asset value of shares of Seligman  Cash
Management  Fund that were  acquired  through an  exchange  of shares of another
Seligman  Mutual Fund on which there was an initial sales load. An investor or a
dealer  purchasing  Class A shares on behalf of any investor  must indicate that
the  investor  has  existing  accounts  when making  investments  or opening new
accounts. For more information concerning terms of Letters of Intent, see "Terms
and Conditions."
    

     SPECIAL PROGRAMS.  The Series may sell Class A shares at net asset value to
present and retired directors,  trustees,  officers, employees and their spouses
(and  family  members  of the  foregoing)  of the  Fund,  the  other  investment
companies in the Seligman Group, the Manager and other companies affiliated with
the Manager. Family members are defined to include lineal descendants and lineal
ancestors,  siblings  (and  their  spouses  and  children)  and any  company  or
organization controlled by any of the foregoing.  Such sales also may be made to
employee  benefit  and  thrift  plans  for such  persons  and to any  investment
advisory,  custodial, trust or other fiduciary account managed or advised by the
Manager or any affiliate.

     Class A  shares  also  may be  issued  without  an  initial  sales  load in
connection with the acquisition of cash and securities owned by other investment
companies;  to any  registered  unit  investment  trust  which is the  issuer of
periodic  payment plan  certificates,  the net proceeds of which are invested in
Series shares; to separate  accounts  established and maintained by an insurance
company which are exempt from  registration  under Section  3(c)(11) of the 1940
Act; to registered  representatives  and employees  (and their spouses and minor
children)  of any dealer  that has a sales  agreement  with SFSI;  to  financial
institution trust  departments;  to registered  investment  advisers  exercising
discretionary  investment  authority  with  respect  to the  purchase  of Series
shares;  to accounts of financial  institutions  or  broker/dealers  that charge
account  management  fees,  provided  the Manager or one of its  affiliates  has
entered into an agreement with respect to such  accounts;  pursuant to sponsored
arrangements with  organizations  which make  recommendations to or permit group
solicitations of, its employees,  members or participants in connection with the
purchase of shares of the Series; to other investment  companies in the Seligman
Group in connection with a deferred fee arrangement for outside  directors;  and
to "eligible  employee benefit plans" which have at least (i) $500,000  invested
in the Seligman Mutual Funds or (ii) 50 eligible  employees to whom such plan is
made available.  "Eligible employee benefit plan" means any plan or arrangement,
whether or not tax qualified,  which provides for the purchase of Series shares.
Sales  of  shares  to such  plans  must be made  in  connection

                                       14
<PAGE>

with a payroll  deduction  system of plan funding or other system  acceptable to
Seligman Data Corp.

   
     Section 403(b) plans sponsored by public  educational  institutions are not
eligible for net asset value purchases based on the aggregate investment made by
the plan or number of eligible  employees.  Employee  benefit plans eligible for
net asset value sales, as described  above,  will be subject to a CDSL of 1% for
terminations at the plan level only, on redemptions of shares  purchased  within
eighteen months prior to plan  termination.  Sales pursuant to a 401(k) or other
retirement  alliance  program  the sponsor of which has an  agreement  with SFSI
pursuant to which  shares are made  available at net asset value are not subject
to a CDSL.
    

     CLASS B SHARES.  Class B shares are sold without an initial  sales load but
are subject to a CDSL if the shares are redeemed within six years of purchase at
rates set forth in the table below,  charged as a percentage  of the current net
asset value or the original purchase price, whichever is less.

YEARS SINCE PURCHASE                                  CDSL
- --------------------                                  ----
less than 1 year......................................   5%
1 year or more but less than 2 years..................   4%
2 years or more but less than 3 years.................   3%
3 years or more but less than 4 years.................   3%
4 years or more but less than 5 years.................   2%
5 years or more but less than 6 years.................   1%
6 years or more.......................................   0%

   
     Class B shares are also subject to an annual  distribution  fee of .75% and
an annual  service fee of up to .25% of the average daily net asset value of the
Class B shares.  SFSI will make a 4% payment to dealers in respect of  purchases
of Class B shares. Approximately eight years after purchase, Class B shares will
convert  automatically to Class A shares, which are subject to an annual service
fee of .25% but no distribution  fee. Shares purchased  through  reinvestment of
dividends  and capital  gain  distributions  on Class B shares also will convert
automatically  to Class A shares along with the underlying  shares on which they
were earned. Conversion occurs at the end of the month which precedes the eighth
anniversary  of the purchase date. If Class B shares of the Series are exchanged
for Class B shares of  another  Seligman  Mutual  Fund,  the  conversion  period
applicable to the Class B shares  acquired in the exchange  will apply,  and the
holding period of the shares exchanged will be tacked onto the holding period of
the shares acquired.  Class B shareholders of the Series exercising the exchange
privilege  will  continue  to be subject to the  Series'  CDSL  schedule if such
schedule is higher or longer than the CDSL schedule  relating to the new Class B
shares.  In addition,  Class B shares of the Series acquired by exchange will be
subject to the Series' CDSL  schedule if such  schedule is higher or longer than
the CDSL schedule relating to the original Class B shares.

     CLASS D SHARES.  Class D shares are sold without an initial  sales load but
are subject to a 1% CDSL if the shares are redeemed  within one year,  an annual
distribution  fee of up to .75% and an annual  service fee of up to .25%, of the
average daily net asset value of the Class D shares. SFSI will make a 1% payment
to dealers in respect of  purchases  of Class D shares.  Unlike  Class B shares,
Class D shares do not automatically convert to Class A shares after eight years.

     CONTINGENT  DEFERRED  SALES LOAD. A CDSL will be imposed on  redemptions of
Class B or Class D shares which were  purchased  during the  preceding six years
(for Class B shares) or twelve  months  (for Class D shares).  The amount of any
CDSL will be used by SFSI to defray  the  expense  of the  payment of 4% (in the
case of Class B  shares)  or 1% (in the case of  Class D  shares)  made by it to
Service  Organizations (as defined under  "Administration,  Shareholder Services
and Distribution  Plan") at the time of sale.  Pursuant to an agreement with FEP
Capital,  L.P.  ("FEP") to fund payments in respect of Class B shares,  SFSI has
agreed to assign any Class B CDSL to FEP.

     A CDSL  of 1%  will  also be  imposed  on  redemptions  of  Class A  shares
purchased  during the preceding  eighteen months if such shares were acquired at
net asset value  pursuant to the sales load  schedule  provided  under  "Class A
Shares--Initial Sales Load." Employee benefit plans eligible for net asset value
sales as described above under "Special Programs" may be subject to a CDSL of
    

                                       15
<PAGE>

1% for  terminations at the plan level only, on redemptions of shares  purchased
within eighteen months prior to plan termination.

   
     The 1% CDSL  normally  imposed on  redemptions  of  certain  Class A shares
(i.e.,  those purchased during the preceding  eighteen months at net asset value
pursuant to the sales load  schedule  provided  under  "Class A  Shares--Initial
Sales Load") will be waived on shares that were purchased through Morgan Stanley
Dean Witter & Co. ("Morgan Stanley") by certain Chilean institutional  investors
(i.e., pension plans,  insurance companies and mutual funds). Upon redemption of
such shares within an eighteen month period,  Morgan Stanley will reimburse SFSI
a pro rata portion of the fee it received  from SFSI at the time of sale of such
shares.

     To minimize the  application  of a CDSL to a  redemption,  shares  acquired
pursuant to the  investment of dividends and capital gain  distributions  (which
are not subject to a CDSL) will be redeemed first; followed by shares held for a
period of time  longer  than the  applicable  CDSL  period.  Shares held for the
longest  period of time  within the  applicable  period  will then be  redeemed.
Additionally, for those shares determined to be subject to a CDSL, the CDSL will
be assessed on the current net asset value or original purchase price, whichever
is less.  No CDSL will be imposed on shares  acquired  though the  investment of
dividends  or capital  gain  distributions  from any Class A, Class B or Class D
shares of mutual funds in the Seligman Group.
    

     For example,  assume an investor purchased 100 Class D shares in January at
a price of $10.00 per share.  During the first year, 5 additional Class D shares
were acquired through investment of dividends and  distributions.  In January of
the following year, an additional 50 Class D shares were purchased at a price of
$12.00  per  share.  In March of that  year,  the  investor  chooses  to  redeem
$1,500.00 from the account which now holds 155 Class D shares with a total value
of  $1,898.75  ($12.25  per  share).  The  CDSL for  this  transaction  would be
calculated as follows:

Total shares to be redeemed

   
  (122.449 @ $12.25) as follows:.........     $1,500.00
                                              =========
Dividend/Distribution shares
     (5 @ $12.25)........................     $   61.25
    

Shares held more than 1 year
     (100 @ $12.25)......................      1,225.00

Shares held less than 1 year subject to
     CDSL (17.449 @ $12.25)..............        213.75
                                              ---------
     Gross proceeds of redemption........     $1,500.00

Less CDSL (17.449 shares @
  $12.00 = $209.39 x 1% = $2.09).........         (2.09)
                                              ---------

     Net proceeds of redemption..........     $1,497.91
                                              =========


     For  federal  income tax  purposes,  the amount of the CDSL will reduce the
gain or increase the loss,  as the case may be, on the amount  recognized on the
redemption of shares.

     The CDSL will be waived or reduced in the following instances:

   
     (a) on redemptions following the death or disability (as defined in section
72 (m)(7) of the Internal  Revenue Code of 1986,  as amended (the  "Code")) of a
shareholder or beneficial owner; (b) in connection with (i)  distributions  from
retirement   plans  qualified  under  section  401(a)  of  the  Code  when  such
redemptions  are  necessary to make  distributions  to plan  participants  (such
payments  include,  but are not  limited to death,  disability,  retirement,  or
separation  of  service),  (ii)  distributions  from a custodial  account  under
section 403 (b)(7) of the Code or an  individual  retirement  account (an "IRA")
due to death, disability,  minimum distribution requirements after attainment of
age 70 1/2, or, for accounts established prior to January 1, 1998, attainment of
age 59 1/2, and (iii) a tax-free return of an excess contribution to an IRA; (c)
in whole or in part,  in  connection  with  shares  sold to current  and retired
Trustees of the Fund; (d) in whole or in part, in connection with shares sold to
any state, county, or city
    

                                       16
<PAGE>

   
or any  instrumentality,  department,  authority,  or agency  thereof,  which is
prohibited by applicable  investment laws from paying a sales load or commission
in  connection  with  the  purchase  of  shares  of  any  registered  investment
management  company;  (e) in whole or in part,  in  connection  with  systematic
withdrawals;  (f) in connection  with  participation  in the Merrill Lynch Small
Market 401(k)  Program;  and (g) in connection  with the redemption of shares of
the Series if the Series is combined  with  another  Seligman  Mutual  Fund,  or
another similar reorganization transaction.
    

     If, with respect to a redemption  of any Class A, Class B or Class D shares
sold by a dealer,  the CDSL is waived  because the  redemption  qualifies  for a
waiver as set forth above,  the dealer shall remit to SFSI promptly upon notice,
an amount  equal to the payment or a portion of the payment  made by SFSI at the
time of sale of such shares.

       

     SFSI may from time to time assist dealers by, among other things, providing
sales  literature  to, and holding  informational  programs  for the benefit of,
dealers'  registered  representatives.  Dealers may limit the  participation  of
registered  representatives  in such  informational  programs  by means of sales
incentive  programs  which may  require  the sale of minimum  dollar  amounts of
shares of the Seligman  Mutual Funds.  SFSI may from time to time pay a bonus or
other  incentive to dealers that sell shares of the Seligman  Mutual  Funds.  In
some  instances,  these  bonuses or  incentives  may be offered  only to certain
dealers  which  employ  registered  representatives  who have sold or may sell a
significant amount of shares of the Series and/or certain other funds managed by
the Manager during a specified period of time. Such bonus or other incentive may
take the form of payment for travel  expenses,  including  lodging,  incurred in
connection with trips taken by qualifying registered representatives and members
of their  families to places  within or outside the United  States.  The cost to
SFSI of such  promotional  activities and payments shall be consistent  with the
Rules of the  National  Association  of  Securities  Dealers,  Inc.,  as then in
effect.

TELEPHONE TRANSACTIONS

   
     A shareholder with telephone transaction privileges,  AND THE SHAREHOLDER'S
BROKER/DEALER   REPRESENTATIVE,   has  the  ability  to  effect  the   following
transactions  via  telephone:  (i) redemption of Series shares with the proceeds
sent to the  address of record (up to $50,000  per day per fund  account),  (ii)
exchange  of Series  shares for  shares of the same  class of  another  Seligman
Mutual Fund, (iii) change of a dividend and/or capital gain distribution option,
and (iv) change of address.  In  addition,  a  shareholder  who has current bank
information on file with Seligman Data Corp. may redeem shares via telephone and
have the proceeds electronically transferred from the shareholder's fund account
to the shareholder's predesignated bank account. See "Redemption of Shares." All
telephone  transactions  are  effected  through  Seligman  Data  Corp.  at (800)
221-2450.

     FOR INVESTORS WHO PURCHASE  SHARES BY COMPLETING  AND SUBMITTING AN ACCOUNT
APPLICATION:  Unless an election is made otherwise on the Account Application, a
shareholder and the shareholder's  broker/dealer of record, as designated on the
Account   Application,   will  automatically   receive  telephone  services.   A
shareholder  must  provide  bank  information  on the Account  Application  or a
supplemental  election form in order to have  redemptions  via telephone sent to
the shareholder's bank account.

     FOR  INVESTORS  WHO  PURCHASE  SHARES  THROUGH A  BROKER/DEALER:  Telephone
services for a shareholder and the shareholder's  representative  may be elected
by completing a supplemental  election form available from the  broker/dealer of
record.
    

     FOR  ACCOUNTS  REGISTERED  AS IRAS:  Telephone  services  will include only
exchanges or address changes.

   
     FOR CORPORATIONS OR GROUP RETIREMENT PLANS:  Telephone  redemptions are not
permitted.  Additionally,  group  retirement plans are not permitted to change a
dividend or gain distribution option. Group retirement plans that may allow
    

                                       17
<PAGE>

plan participants to place telephone exchanges directly with the Fund must first
provide a letter of authorization signed by the plan's custodian or trustee, and
provide a telephone services election form signed by each plan participant.

     All Seligman  Mutual Funds with the same account  number (i.e.,  registered
exactly the same) as an existing  account,  including  any new fund in which the
shareholder invests in the future, will automatically include telephone services
if the existing account has telephone  services.  Telephone services may also be
elected at any time on a supplemental telephone services election form.

     For accounts registered jointly (such as joint tenancies, tenants in common
and community  property  registrations),  each owner, by accepting or requesting
telephone  services,  authorizes  each of the other  owners to effect  telephone
transactions on his or her behalf.

     During times of drastic  economic or market  changes,  a shareholder or the
shareholder's  representative may experience  difficulty in contacting  Seligman
Data Corp. to request a redemption  or exchange of Series shares via  telephone.
In these  circumstances,  the  shareholder or the  shareholder's  representative
should consider using other redemption or exchange procedures.  (See "Redemption
of Shares"  below.) Use of these other  redemption  or exchange  procedures  may
result in the  request  being  processed  at a later  time  than if a  telephone
transaction had been used, and the Series' net asset value may fluctuate  during
such periods.

     The Fund and  Seligman  Data Corp.  will employ  reasonable  procedures  to
confirm that  instructions  communicated  by telephone  are genuine.  These will
include:  recording all telephone calls requesting  account activity,  requiring
that the caller provide certain requested personal and/or account information at
the time of the call for the purpose of establishing the caller's identity,  and
sending a written  confirmation of redemptions,  exchanges or address changes to
the address of record each time activity is initiated by  telephone.  As long as
the Fund and Seligman Data Corp. follow  instructions  communicated by telephone
that  were  reasonably  believed  to be  genuine  at the time of their  receipt,
neither  they nor any of their  affiliates  will be  liable  for any loss to the
shareholder  caused by an  unauthorized  transaction.  In any instance where the
Fund or  Seligman  Data Corp.  is not  reasonably  satisfied  that  instructions
received  by  telephone  are  genuine,  the  requested  transaction  will not be
executed,  and neither they nor any of their  affiliates  will be liable for any
losses which may occur due to a delay in implementing  the  transaction.  If the
Fund or Seligman Data Corp. does not follow the procedures  described above, the
Fund or Seligman Data Corp. may be liable for any losses due to  unauthorized or
fraudulent  instructions.  Telephone  transactions  must be  effected  through a
representative  of Seligman Data Corp.,  i.e.,  requests may not be communicated
via Seligman Data Corp.'s automated telephone answering system. Shareholders, of
course,  may refuse or cancel  telephone  services.  Telephone  services  may be
terminated by a shareholder at any time by sending a written request to Seligman
Data  Corp.  TELEPHONE  SERVICES  MAY  NOT  BE  ESTABLISHED  BY A  SHAREHOLDER'S
BROKER/DEALER  WITHOUT THE WRITTEN  AUTHORIZATION  OF THE  SHAREHOLDER.  Written
acknowledgment  of the addition of telephone  services to an existing account or
termination of telephone services will be sent to the shareholder at the address
of record.

REDEMPTION OF SHARES

   
     A shareholder may redeem shares held in book credit ("uncertificated") form
without charge,  except a CDSL, if applicable,  at any time by SENDING A WRITTEN
REQUEST to Seligman Data Corp., P.O. Box 9759, Providence,  RI 02940-9759; or if
request is being sent by overnight  delivery  service,  to 100 Park Avenue,  New
York, NY 10017.  The  redemption  request must be signed by all persons in whose
name the shares are registered.  A shareholder may redeem shares that are not in
book credit form without charge,  except a CDSL, if applicable,  by surrendering
certificates  in proper form to the same  address.  Certificates  should be sent
certified or registered  mail.  Return receipt is advisable;  however,  this may
increase  mailing  time.  Share  certificates  must be endorsed  for
    

                                       18
<PAGE>

   
transfer or  accompanied  by an endorsed  stock power signed by all share owners
exactly  as  their   name(s)   appear(s)  on  the  account   registration.   The
shareholder's  letter of  instruction or endorsed stock power should specify the
Series  name,  account  number,  class of shares  (A, B or D) and the  number of
shares or dollar  amount to be  redeemed.  The Fund  cannot  accept  conditional
redemption  requests (i.e.,  requests to sell shares at a specific price or on a
future date).  If the  redemption  proceeds are (i) $50,000 or more,  (ii) to be
paid to someone other than the shareholder of record  (regardless of the amount)
or (iii) to be mailed to other  than the  address of record  (regardless  of the
amount),  the  signature(s)  of the  shareholder(s)  must  be  guaranteed  by an
eligible  financial  institution  including,  but not limited to, the following:
banks, trust companies,  credit unions,  securities brokers and dealers, savings
and loan  associations and participants in the Securities  Transfer  Association
Medallion Program (STAMP),  the Stock Exchanges Medallion Program (SEMP) and the
New York Stock Exchange Medallion Signature Program (MSP). The Fund reserves the
right to reject a signature guarantee where it is believed that the Fund will be
placed at risk by  accepting  such  guarantee.  A  signature  guarantee  is also
necessary in order to change the account registration.  Notarization by a notary
public is not an acceptable  signature  guarantee.  A signature guarantee is not
required  if  redemption   proceeds  are  transferred   electronically   to  the
shareholder's predesignated bank account.
    

     ADDITIONAL DOCUMENTATION MAY ALSO BE REQUIRED BY SELIGMAN DATA CORP. IN THE
EVENT  OF A  REDEMPTION  BY A  CORPORATION,  EXECUTOR,  ADMINISTRATOR,  TRUSTEE,
CUSTODIAN OR RETIREMENT PLAN. FOR FURTHER INFORMATION WITH RESPECT TO REDEMPTION
REQUIREMENTS,  PLEASE CONTACT THE  SHAREHOLDER  SERVICES  DEPARTMENT OF SELIGMAN
DATA CORP. FOR ASSISTANCE.

   
     In the case of Class A shares  (except  for  shares  purchased  without  an
initial sales load due to the size of the purchase),  and in the case of Class B
shares  redeemed  after six years and Class D shares  redeemed after one year, a
shareholder  will  receive the net asset value per share next  determined  after
receipt  of a request in good  order.  If Class A shares  which  were  purchased
without an initial sales load because the purchase amount was $1,000,000 or more
are redeemed within eighteen months of purchase,  a shareholder will receive the
net asset  value per share next  determined  after  receipt of a request in good
order,  less a CDSL  of 1% as  described  under  "Purchase  of  Shares--Class  A
Shares-Initial  Sales Load"  above.  If Class B shares are  redeemed  within six
years of purchase, a shareholder will receive the net asset value per share next
determined after receipt of a request in good order, less the applicable CDSL as
described  under  "Purchase of  Shares--Class B Shares" above. If Class D shares
are redeemed  within one year of purchase,  a  shareholder  will receive the net
asset value per share next determined  after receipt of a request in good order,
less a CDSL of 1% as described under "Purchase of Shares--Class D Shares" above.
    

     A  shareholder  also may "sell"  shares to the Fund  through an  investment
dealer and, in that way, be certain, providing the order is timely, of receiving
the net asset  value  established  at the end of the day on which the  dealer is
given the repurchase order (less any applicable  CDSL). The Fund makes no charge
for this  transaction,  but the  dealer  may  charge a  service  fee.  "Sell" or
repurchase  orders  received from an  authorized  dealer before the close of the
NYSE and received by SFSI, the repurchase agent, before the close of business on
the same day will be executed at the net asset value per share  determined as of
the close of the NYSE on that day, less any applicable CDSL.  Repurchase  orders
received from authorized  dealers after the close of the NYSE or not received by
SFSI prior to the close of  business,  will be  executed  at the net asset value
determined  as of the  close  of the  NYSE on the  next  trading  day,  less any
applicable CDSL. Shares held in a "street name" account with a broker/dealer may
be sold to the Fund only through a broker/dealer.

   
     TELEPHONE  REDEMPTIONS.  Telephone redemptions of uncertificated shares may
be made once per day, in an amount of up to $50,000 per fund  account.  Proceeds
will be sent to the address of record.  A shareholder  whose bank is a member of
the ACH network
    

                                       19
<PAGE>

   
and who has current bank  information  on file with Seligman Data Corp. may have
redemption   proceeds   transferred    electronically   to   the   shareholder's
predesignated bank account.  Telephone  redemption requests received by Seligman
Data  Corp.  at (800)  221-2450  by the  close of  regular  trading  on the NYSE
(normally,  4:00 p.m.  Eastern  time) will be processed at the Series' net asset
value determined as of the close of business on that day. Redemption requests by
telephone will not be accepted within 30 days following an address change. IRAs,
group  retirement  plans,  corporations  and  trusts  for  which the name of the
current trustee does not appear in the account registration are not eligible for
telephone  redemptions.  The Fund reserves the right to suspend or terminate the
telephone redemption service at any time without notice.
    

     For more  information  about telephone  redemptions  and the  circumstances
under  which  a  shareholder  may  bear  the  risk  of  loss  for  a  fraudulent
transaction, see "Telephone Transactions" above.

     CHECK REDEMPTION SERVICE. The Check Redemption Service allows a shareholder
who owns or  purchases  shares in the  Series  worth  $25,000 or more to request
Seligman  Data  Corp.  to  provide   redemption   checks  to  be  drawn  on  the
shareholder's  account in amounts of $500 or more. The  shareholder may elect to
use this  Service on the  Account  Application  or by later  written  request to
Seligman Data Corp.  Shares for which  certificates have been issued will not be
available for  redemption  under this service.  Holders of Class A shares should
bear in mind that  check  redemptions  of Class A shares  acquired  at net asset
value due to the size of the purchase may be subject to a CDSL. Holders of Class
B shares may use this service  although check  redemptions of Class B shares may
be  subject  to a CDSL.  Holders  of Class D shares  may use this  service  with
respect to shares that have been held for at least one year.  Dividends continue
to be earned  through the date  preceding the date the check clears for payment.
Use of this  service is subject to Boston Safe  Deposit and Trust Co.  rules and
regulations  covering checking accounts.  Separate  checkbooks will be furnished
for each series of the Fund.

     There is no  charge  for use of  checks.  When  honoring  a check  that was
processed  for payment,  Boston Safe Deposit and Trust Co. will cause the Series
to redeem exactly enough full and fractional shares from an account to cover the
amount of the check  and any  applicable  CDSL.  If  shares  are owned  jointly,
redemption checks must be signed by all persons, unless otherwise elected on the
Account Application, in which case a single signature will be acceptable.

     In view of daily  fluctuations in share value,  the  shareholder  should be
certain  that the  amount of shares in the  account is  sufficient  to cover the
amount of checks written. If insufficient  shares are in the account,  the check
will be returned,  marked "insufficient  funds." THE FUND WILL NOT REDEEM SHARES
IN ONE SERIES TO COVER A CHECK  WRITTEN ON ANOTHER  SERIES.  SELIGMAN DATA CORP.
MAY CHARGE A $10.00  PROCESSING FEE FOR ANY CHECK  REDEMPTION  DRAFT RETURNED AS
UNCOLLECTABLE. THIS CHARGE MAY BE DEDUCTED FROM THE SHAREHOLDER'S ACCOUNT.

     Check redemption books cannot be reordered unless the shareholder's account
has  a  value  of  $25,000  or  more  and  the  Fund  has a  certified  Taxpayer
Identification Number on file.

     Cancelled checks will be returned to a shareholder under separate cover the
month after they clear.  The Check  Redemption  Service may be terminated at any
time  by the  Fund  or  Boston  Safe  Deposit  and  Trust  Co.  See  "Terms  and
Conditions."

   
     GENERAL.  With respect to shares redeemed,  a check for the proceeds,  less
any applicable CDSL, will be sent to the shareholders'  address of record within
seven calendar days after  acceptance of the  redemption  order and will be made
payable to all of the registered  owners on the account.  With respect to shares
repurchased by the Fund, a check for the proceeds will be sent to the investment
dealer within seven calendar days after  acceptance of the repurchase  order and
will be made payable to the investment dealer.  Redemptions via telephone to the
shareholder's  bank  account  will be  transferred  electronically  within  five
business days. Pay-
    

                                       20
<PAGE>

   
ment of redemption  proceeds will be delayed on redemptions of shares  purchased
by check (unless  certified) until Seligman Data Corp.  receives notice that the
check has  cleared,  which may be up to 15 days from the credit of the shares to
the  shareholder's  account.  No interest is earned on the  redemption  proceeds
during this period.  The proceeds of a redemption or  repurchase  may be more or
less than the shareholder's cost.
    

     The Fund reserves the right to redeem  shares owned by a shareholder  whose
investment in the Series has a value of less than a minimum amount  specified by
the Fund's  Trustees,  which is  presently  $500.  Shareholders  would be sent a
notice  before such  redemption  is  processed  stating  that the value of their
investment in the Series is less than the  specified  minimum and that they have
sixty days to make an additional investment.

     REINSTATEMENT  PRIVILEGE.  If a shareholder redeems Class A shares and then
decides  to  reinvest  them,  or to shift  the  investment  to one of the  other
Seligman Mutual Funds, the shareholder may, within 120 calendar days of the date
of  redemption,  use  all or any  part  of the  proceeds  of the  redemption  to
reinstate,  free of an initial sales load,  all or any part of the investment in
shares of the Series or in shares of one of the other Seligman  Mutual Funds. If
a  shareholder  redeems  shares and the  redemption  was subject to a CDSL,  the
shareholder  may  reinstate  all or any part of the  investment in shares of the
same class of the Series or any of the other  Seligman  Mutual  Funds within 120
calendar days of the date of redemption  and receive a credit for the applicable
CDSL paid.  Such  investment will be reinstated at the net asset value per share
established  as of the  close of the NYSE on the day the  request  is  received.
Seligman  Data  Corp.  must  be  informed  that  the  purchase  is a  reinstated
investment.  REINSTATED  SHARES  MUST BE  REGISTERED  EXACTLY AND BE OF THE SAME
CLASS AS THE SHARES PREVIOUSLY REDEEMED;  AND THE FUND'S MINIMUM INVESTMENT MUST
BE MET AT THE TIME OF REINSTATEMENT.

     Generally,  exercise  of the  Reinstatement  Privilege  does not  alter the
Federal  income  tax status of any  capital  gain  realized  on a sale of Series
shares,  but to the extent  that any shares are sold at a loss and the  proceeds
are reinvested in shares of the same Series, some or all of the loss will not be
allowed  as  a  deduction,   depending  upon  the  percentage  of  the  proceeds
reinvested.

ADMINISTRATION, SHAREHOLDER SERVICES AND DISTRIBUTION PLAN

     Under the Series'  Administration,  Shareholder  Services and  Distribution
Plan (the  "Plan"),  the Series may pay to SFSI an  administration,  shareholder
services  and  distribution  fee in respect of the Series'  Class A, Class B and
Class D shares. Payments under the Plan may include, but are not limited to: (i)
compensation   to   securities   dealers  and  other   organizations   ("Service
Organizations")  for providing  distribution  assistance  with respect to assets
invested in the Series, (ii) compensation to Service Organizations for providing
administration, accounting and other shareholder services with respect to Series
shareholders,  and (iii)  otherwise  promoting the sale of shares of the Series,
including paying for the preparation of advertising and sales literature and the
printing and  distribution  of such  promotional  materials and  prospectuses to
prospective investors and defraying SFSI's costs incurred in connection with its
marketing efforts with respect to shares of the Series. The Manager, in its sole
discretion, may also make similar payments to SFSI from its own resources, which
may include the management fee that the Manager receives from the Series.

     Under the Plan, the Series reimburses SFSI for its expenses with respect to
Class A shares at an annual  rate of up to .25% of the  average  daily net asset
value of Class A  shares.  It is  expected  that  the  proceeds  from the fee in
respect  of  Class A  shares  will  be  used  primarily  to  compensate  Service
Organizations which enter into agreements with SFSI. Such Service  Organizations
will  receive  from  SFSI a  continuing  fee of up to .25% on an  annual  basis,
payable  quarterly,   of  the  average  daily  net  assets  of  Class  A  shares
attributable  to the  particular  Service  Organization  for providing  personal
service and/or the  maintenance of  shareholder

                                       21
<PAGE>

accounts. The fee payable from time to time is, within such limit, determined by
the Trustees of the Fund.

     The Plan, as it relates to Class A shares,  was approved by the Trustees on
October 9, 1984 and was approved by the  shareholders of the Series on April 10,
1986. The Plan is reviewed by the Trustees  annually.  The total amount paid for
the year  ended  December  31,  1997 in respect  of the  Series'  Class A shares
pursuant to the Plan was equal to .22% of the Class A shares'  average daily net
assets.

   
     Under the Plan, the Series reimburses SFSI for its expenses with respect to
Class B and  Class D  shares  at an  annual  rate of up to 1% of the  respective
average  daily net asset value of the Class B and Class D shares.  Proceeds from
the Class B distribution fees are used to pay Service Organizations a continuing
fee of up to .25% on an annual  basis of the  average  daily net asset  value of
Class B shares  attributable to particular  Service  Organizations for providing
personal service and/or the maintenance of shareholder accounts and will also be
used by SFSI to defray the  expense  of the  payment of 4% made by it to Service
Organizations  at the time of the sale of Class B  shares.  In that  connection,
SFSI has  assigned  FEP its interest in the fees payable to it in respect of the
Class B shares,  other than the portion  payable to Service  Organizations  on a
continuing basis. Proceeds from the Class D distribution fees are used primarily
to compensate Service Organizations for administration, shareholder services and
distribution  assistance  (including a continuing fee of up to .25% on an annual
basis of the  average  daily net asset value of Class D shares  attributable  to
particular   Service   Organizations  for  providing   personal  service  and/or
maintenance  of  shareholder  accounts)  and will  initially  be used by SFSI to
defray the expense of the payment of 1% made by it to Service  Organizations  at
the time of sale of Class D shares. The amounts expended by SFSI in any one year
upon the  initial  purchase of Class B and Class D shares may exceed the amounts
received  by  it  from  Plan  payments  retained.  Expenses  of  administration,
shareholder  services  and  distribution  of Class B and  Class D shares  in one
fiscal  year  may be paid  from  Class B and  Class D Plan  fees,  respectively,
received in any other fiscal year.

     The Plan, as it relates to Class B shares,  was approved by the Trustees on
September 19, 1996 and became effective January 1, 1997. The Plan, as it relates
to Class D shares, was amended by the Trustees of the Fund on July 15, 1993. The
total amount paid for the year ended  December  31, 1997 by the Series'  Class B
and Class D shares  pursuant to the Plan was 1% per annum of the  average  daily
net assets of the Class B and Class D shares. The Plan is reviewed by the Fund's
Trustees annually.

     Seligman Services,  Inc. ("SSI"), an affiliate of the Manager, is a limited
purpose broker/dealer.  SSI acts as broker/dealer of record for most shareholder
accounts that do not have a designated  broker/dealer  of record,  including all
such  shareholder  accounts  established  after  April 1, 1995 and will  receive
compensation  for  providing  personal  service and account  maintenance  to its
accounts of record.
    

EXCHANGE PRIVILEGE

     A  shareholder  of the Series may,  without  charge,  exchange at net asset
value any part or all of an  investment  in the  Series  for shares of the other
series  of the Fund or for  shares of any of the other  Seligman  Mutual  Funds.
Exchanges may be made by mail, or by telephone if the  shareholder has telephone
services.

     Class A,  Class B and  Class D shares  may be  exchanged  only for Class A,
Class B and Class D  shares,  respectively,  of the other  series of the Fund or
another  mutual fund in the  Seligman  Group on the basis of relative  net asset
value.

   
     If shares  that are subject to a CDSL are  exchanged  for shares of another
Seligman  Mutual  Fund,  then for  purposes of  assessing  the CDSL payable upon
disposition  of the exchanged  shares,  the  applicable  holding period shall be
reduced by the period for which the original shares were held.
    

     Class B shareholders of the Series  exercising the exchange  privilege will
continue to be subject to the

                                       22
<PAGE>

   
Series'  CDSL  schedule  if such  schedule  is higher  or  longer  than the CDSL
schedule relating to the new Class B shares. In addition,  Class B shares of the
Series acquired through exchange will be subject to the Series' CDSL schedule if
such schedule is higher or longer than the CDSL schedule relating to the Class B
shares of the fund from which such shares were exchanged.
    

     The Seligman Mutual Funds available under the Exchange Privilege are:

     o SELIGMAN  CAPITAL  FUND,  INC.  seeks  aggressive  capital  appreciation.
Current income is not an objective.

     O SELIGMAN CASH MANAGEMENT  FUND, INC. invests in high quality money market
instruments. Shares are sold at net asset value.

     O SELIGMAN  COMMON STOCK FUND,  INC.  seeks  favorable  current  income and
long-term  growth of both income and capital value without  exposing  capital to
undue risk.

     O SELIGMAN  COMMUNICATIONS  AND INFORMATION FUND, INC. invests in shares of
companies in the  communications,  information and related industries to produce
capital gain. Income is not an objective.

     O SELIGMAN  FRONTIER  FUND,  INC. seeks to produce growth in capital value.
Income may be considered  but will only be  incidental to the fund's  investment
objective.

     O SELIGMAN GROWTH FUND, INC. seeks longer-term  growth in capital value and
an increase in future income.

     O SELIGMAN  HENDERSON  GLOBAL FUND  SERIES,  INC.  consists of the Seligman
Henderson  International  Fund, the Seligman  Henderson  Emerging Markets Growth
Fund,  the Seligman  Henderson  Global Growth  Opportunities  Fund, the Seligman
Henderson  Global  Smaller  Companies  Fund and the  Seligman  Henderson  Global
Technology  Fund,  which  seek  long-term  capital  appreciation   primarily  by
investing in companies either globally or internationally.

     O SELIGMAN  HIGH INCOME FUND SERIES seeks high current  income by investing
in debt  securities.  In  addition  to the  Series,  the  Fund  consists  of the
High-Yield Bond Series.

     O SELIGMAN  INCOME FUND, INC. seeks high current income and the possibility
of improvement of future income and capital value.

     O SELIGMAN MUNICIPAL FUND SERIES, INC. consists of several State Series and
a National Series. The National Municipal Series seeks to provide maximum income
exempt from regular federal income taxes;  individual state series, each seeking
to maximize  income exempt from regular  federal  income taxes and from personal
income  taxes  in  designated  states  are  available  for  Colorado,   Georgia,
Louisiana,  Maryland,  Massachusetts,  Michigan, Minnesota,  Missouri, New York,
Ohio, Oregon and South Carolina. (Does not currently offer Class B shares.)

     O  SELIGMAN  MUNICIPAL  SERIES  TRUST  includes  the  California  Municipal
High-Yield  Series,  the  California   Municipal  Quality  Series,  the  Florida
Municipal Series and the North Carolina Municipal Series,  each of which invests
in municipal securities of its designated state. (Does not currently offer Class
B shares.)

     O SELIGMAN NEW JERSEY  MUNICIPAL FUND, INC. invests in investment grade New
Jersey municipal securities. (Does not currently offer Class B shares.)

     O SELIGMAN  PENNSYLVANIA  MUNICIPAL FUND SERIES invests in investment grade
Pennsylvania municipal securities. (Does not currently offer Class B shares.)

   
     O SELIGMAN VALUE FUND SERIES, INC. consists of the Seligman Large-Cap Value
Fund and the Seligman Small-Cap Value Fund each of which seeks long-term capital
appreciation  by investing in equity  securities  of value  companies  primarily
located in the U.S.

     All  permitted  exchanges  will be based  on the net  asset  values  of the
respective  funds determined at the close of regular trading on the NYSE on that
day.  Telephone  requests for exchanges received by the close of regular trading
on the NYSE (normally,  4:00 p.m.
    

                                       23
<PAGE>

   
Eastern time) by Seligman Data Corp. at (800) 221-2450,  will be processed as of
the close of business on that day.  Requests received after the close of regular
trading  on the  NYSE  will be  processed  at the net  asset  values  per  share
calculated the following business day. The registration of an account into which
an exchange is made must be  identical to the  registration  of the account from
which shares are  exchanged.  When  establishing a new account by an exchange of
shares,  the shares  being  exchanged  must have a value of at least the minimum
initial investment  required by the mutual fund into which the exchange is being
made. THE METHOD OF RECEIVING DISTRIBUTIONS, UNLESS OTHERWISE INDICATED, WILL BE
CARRIED  OVER TO THE NEW  FUND  ACCOUNT,  AS WILL  TELEPHONE  SERVICES.  ACCOUNT
SERVICES,  SUCH AS  INVEST-A-CHECK(R)  SERVICE,  DIRECTED DIVIDENDS,  SYSTEMATIC
WITHDRAWAL PLAN AND CHECK WRITING  PRIVILEGE WILL NOT BE CARRIED OVER TO THE NEW
FUND  ACCOUNT  UNLESS  SPECIFICALLY  REQUESTED  AND  PERMITTED  BY THE NEW FUND.
Exchange  orders may be placed to effect an  exchange  of a  specific  number of
shares,  an exchange of shares equal to a specific  dollar amount or an exchange
of all shares held.  Shares for which  certificates  have been issued may not be
exchanged  via  telephone  and may be  exchanged  only upon receipt of a written
exchange request together with certificates  representing shares to be exchanged
in proper form.

     The Exchange  Privilege via mail is generally  applicable to investments in
group retirement  plans,  although some restrictions may apply. The terms of the
exchange offers described herein may be modified at any time; and not all of the
Seligman  Mutual Funds are  available to residents of all states.  Before making
any exchange,  a shareholder  should contact an authorized  investment dealer or
Seligman Data Corp. to obtain prospectuses of any of the Seligman Mutual Funds.
    

     A broker/dealer  representative  of record will be able to effect exchanges
on behalf of a shareholder only if the shareholder has telephone services or the
broker/dealer has entered into a Telephone  Exchange Agreement with SFSI wherein
the  broker/dealer  must agree to indemnify  SFSI and the Seligman  Mutual Funds
from any loss or liability  incurred as a result of the  acceptance of telephone
exchange orders.

     Written  confirmation of all exchanges will be forwarded to the shareholder
to whom the exchanged shares are registered and a duplicate confirmation will be
sent to the  broker/dealer  of record  listed on the account.  SFSI reserves the
right to reject any telephone exchange request.  Any rejected telephone exchange
order may be processed by mail. For more  information  about telephone  exchange
privileges,  which  unless  objected  to,  are  assigned  to  most  shareholders
automatically,  and the circumstances under which shareholders may bear the risk
of loss for a fraudulent transaction, see "Telephone Transactions" above.

     Exchanges  of shares are sales and may result in a gain or loss for federal
income tax purposes.

FURTHER INFORMATION ABOUT TRANSACTIONS IN THE SERIES

     BECAUSE EXCESSIVE TRADING (INCLUDING  SHORT-TERM,  "MARKET TIMING" TRADING)
CAN HURT THE SERIES' PERFORMANCE,  THE FUND MAY REFUSE ANY EXCHANGE (1) FROM ANY
SHAREHOLDER  ACCOUNT FROM WHICH THERE HAVE BEEN TWO  EXCHANGES IN THE  PRECEDING
THREE MONTH PERIOD,  OR (2) WHERE THE EXCHANGED SHARES EQUAL IN VALUE THE LESSER
OF  $1,000,000  OR 1% OF THE SERIES'  NET  ASSETS.  THE FUND MAY ALSO REFUSE ANY
EXCHANGE OR PURCHASE ORDER FROM ANY  SHAREHOLDER  ACCOUNT IF THE  SHAREHOLDER OR
THE  SHAREHOLDER'S  BROKER/DEALER  HAS BEEN  ADVISED THAT  PREVIOUS  PATTERNS OF
PURCHASES AND REDEMPTIONS OR EXCHANGES HAVE BEEN CONSIDERED EXCESSIVE.  Accounts
under common  ownership or control,  including  those with the same  taxpayer ID
number and those  administered  so as to redeem or  purchase  shares  based upon
certain predetermined market indicators, will be considered one account for this
purpose.  Additionally,  the Fund reserves the right to refuse any order for the
purchase of shares.

                                       24
<PAGE>

   
DIVIDENDS AND CAPITAL GAIN DISTRIBUTIONS
    

     The Series' net investment income is distributed to shareholders monthly in
the form of additional shares, unless the shareholder elects otherwise. Payments
vary in amount depending on income received from the Series' investments and the
costs of operations. Shares begin earning dividends on the day on which the Fund
receives  payment.  Shares continue to earn dividends through the date preceding
the date they are redeemed.

   
     The Series  distributes  substantially all of any taxable net long-term and
short-term gain realized on investments to  shareholders  at least annually.  In
determining  amounts  of  capital  gains to be  distributed,  any  capital  loss
carryforwards from prior years will offset capital gains. For federal income tax
purposes,  the Series had a capital loss carryforward as of December 31, 1997 of
$14,118,544  (including $768,276  transferred from the Seligman Secured Mortgage
Income Series),  of which $4,632,918  expires in 1998,  $12,467 expires in 2001,
$8,470,786  expires in 2002,  $390,430  expires in 2004 and $611,943  expires in
2005.  Accordingly,  the Series may not distribute  capital gains (short-term or
long-term) to  shareholders  until net gains have been realized in excess of the
capital loss carryforward.

     Shareholders   may  elect:   (1)  to  receive  both   dividends   and  gain
distributions in shares; (2) to receive dividends in cash and gain distributions
in shares;  (3) to receive both dividends and gain  distributions  in cash. Cash
dividends and gain distributions are paid by check and sent to the shareholder's
address  of  record  or,  if  elected  by a  shareholder  who has  current  bank
information on file with Seligman Data Corp.,  electronically deposited into the
shareholder's  predesignated  bank  account.  Such  deposits  will  normally  be
credited to the  shareholder's  bank  account in 3 to 4 business  days after the
payable date of the dividend or gain distribution.

     In the case of prototype retirement plans, dividends and gain distributions
are reinvested in additional shares.  Unless another election is made, dividends
and capital  gain  distributions  will be credited  to  shareholder  accounts in
additional  shares.  Shares acquired through a dividend or gain distribution and
credited to a shareholder's  account are not subject to an initial sales load or
a CDSL.  Dividends  and gain  distributions  paid in shares are  invested on the
payable date using the net asset value of the ex-dividend date. Shareholders may
elect to change their dividend and gain distribution options by writing Seligman
Data Corp.  at the  address  listed  below.  If the  shareholder  has  telephone
services,  changes may also be telephoned  to Seligman  Data Corp.  between 8:30
a.m. and 6:00 p.m. Eastern time, by either the shareholder or the  broker/dealer
of  record  on the  account.  For  information  about  telephone  services,  see
"Telephone  Transactions."  These  elections  must be received by Seligman  Data
Corp.  before the record date for the dividend or gain  distribution in order to
be effective for such dividend or gain  distribution.  For information on how to
have   dividend  or  gain   distributions   electronically   deposited   into  a
shareholder's bank account, contact Seligman Data Corp.
    

     The per share  dividends from net investment  income on Class B and Class D
shares will be lower than the per share  dividends on Class A shares as a result
of the higher  distribution  fees applicable with respect to Class B and Class D
shares.  Per share dividends of the three classes may also differ as a result of
differing  class expenses.  Distributions  of net capital gains, if any, will be
paid in the same amount for Class A, Class B and Class D shares.  See  "Purchase
of Shares--Valuation."

   
     Shareholders  exchanging  shares of one  mutual  fund for shares of another
mutual fund in the Seligman  Group will continue to receive  dividends and gains
as elected prior to such exchange unless otherwise specified.  In the event that
a shareholder  redeems all shares in an account  between the record date and the
payable date, the value of any dividends or gain distributions  declared will be
paid in cash regardless of the existing election.  A transfer or exchange of all
shares  (closing an  account),  between the record date and payable  date,  will
result in the value of  dividends  or gain  distributions  being paid to the new
fund  account  in  accordance  with
    

                                       25
<PAGE>

   
the option on the closed  account,  unless  Seligman  Data Corp.  is  instructed
otherwise.
    

FEDERAL INCOME TAXES

     The Series intends to continue to qualify as a regulated investment company
under the Code.  For each year so  qualified,  the Series will not be subject to
federal  income taxes on its net investment  income and capital  gains,  if any,
realized  during any taxable year,  which it  distributes  to its  shareholders,
provided  that at least  90% of its net  investment  income  and net  short-term
capital gains are distributed to shareholders each year.

     Dividends from net investment income and distributions  from net short-term
capital gains are taxable as ordinary income to  shareholders,  whether received
in cash or reinvested in additional shares, and are, generally, not eligible for
the dividends received deduction for corporations.

   
     Distributions  of net  capital  gain  (i.e.,  the  excess of net  long-term
capital gains over any net short-term  losses) are taxable as long-term  capital
gain, whether received in cash or invested in additional  shares,  regardless of
how long  shares have been held by a  shareholder.  Such  distributions  are not
eligible for the dividends received deduction allowed to corporate shareholders.
Shareholders receiving  distributions in the form of additional shares issued by
the Series will be treated for federal income tax purposes as having  received a
distribution  in an  amount  equal  to the  fair  market  value  on the  date of
distribution of the shares received.  Individual shareholders will be subject to
federal  income tax on  distributions  of net capital gains at a maximum rate of
28% if designated  as derived from the Series'  capital gains from property held
for more than one year and at a maximum  rate of 20% if  designated  as  derived
from the Series' capital gains from property held for more than eighteen months.
As noted above, the Series must exhaust its capital loss carry forward before it
may make capital gain distributions to shareholders.

     Any gain or loss realized upon a sale or redemption of shares in the Series
by a shareholder  who is not a dealer in securities will generally be treated as
a long-term  capital gain or loss if the shares have been held for more than one
year and otherwise as a short-term capital gain or loss. Individual shareholders
will be subject to federal  income tax on net capital  gain at a maximum rate of
28% in  respect of shares  held for more than one year and at a maximum  rate of
20% in respect of shares held for more than eighteen months. Net capital gain of
a corporate  shareholder is taxed at the same rate as ordinary income.  However,
if shares on which a long-term  capital gain  distribution has been received are
subsequently  sold or redeemed  and such shares have been held for six months or
less, any loss realized will be treated as long-term  capital loss to the extent
that it offsets the long-term capital gain  distribution.  In addition,  no loss
will be  allowed  on the sale or other  disposition  of shares of the Series if,
within a period  beginning  30 days before the date of such sale or  disposition
and  ending 30 days  after  such  date,  the  holder  acquires  (such as through
dividend reinvestment) securities that are substantially identical to the shares
of the Series.
    

     In  determining  gain or loss on  shares  of the  Series  that  are sold or
exchanged within 90 days after acquisition,  a shareholder generally will not be
permitted to include in the tax basis attributable to such shares the sales load
incurred in acquiring such shares to the extent of any  subsequent  reduction in
the sales load by reason of the Exchange or Reinstatement  Privilege  offered by
the Series.  Any sales load not taken into account in determining  the tax basis
of shares sold or exchanged  within 90 days after  acquisition  will be added to
the  shareholder's  tax basis in the shares acquired pursuant to the Exchange or
Reinstatement Privilege.

     The Series will  generally  be subject to an excise tax of 4% on the amount
of any income or capital gains,  above certain permitted levels,  distributed to
shareholders  on a basis  such  that  such  income  or gain  is not  taxable  to
shareholders in the calendar year in which it was earned. Furthermore, dividends
declared in October, November or December payable to shareholders of record on a
specified date in such a month and paid in the following January will be treated
as having been paid by the Series and received by each  shareholder in December.

                                       26
<PAGE>

Under this rule,  therefore,  shareholders may be taxed in one year on dividends
or gain distributions actually received in January of the following year.

     Shareholders are urged to consult their tax advisors  concerning the effect
of federal income taxes in their individual circumstances.

     UNLESS A SHAREHOLDER  INCLUDES A CERTIFIED TAXPAYER  IDENTIFICATION  NUMBER
(SOCIAL  SECURITY  NUMBER  FOR  INDIVIDUALS)  ON  THE  ACCOUNT  APPLICATION  AND
CERTIFIES THAT THE SHAREHOLDER IS NOT SUBJECT TO BACKUP WITHHOLDING, THE FUND IS
REQUIRED TO WITHHOLD AND REMIT TO THE U.S.  TREASURY A PORTION OF  DISTRIBUTIONS
AND OTHER REPORTABLE PAYMENTS TO THE SHAREHOLDER. THE RATE OF BACKUP WITHHOLDING
IS 31%. SHAREHOLDERS SHOULD BE AWARE THAT, UNDER REGULATIONS  PROMULGATED BY THE
INTERNAL  REVENUE  SERVICE,  THE FUND MAY BE FINED $50 ANNUALLY FOR EACH ACCOUNT
FOR WHICH A CERTIFIED  TAXPAYER  IDENTIFICATION  NUMBER IS NOT PROVIDED.  IN THE
EVENT THAT SUCH A FINE IS  IMPOSED,  THE FUND MAY CHARGE A SERVICE  FEE OF UP TO
$50 THAT MAY BE DEDUCTED FROM THE  SHAREHOLDER'S  ACCOUNT AND OFFSET AGAINST ANY
UNDISTRIBUTED DIVIDENDS AND CAPITAL GAINS DISTRIBUTIONS.  THE FUND ALSO RESERVES
THE  RIGHT TO CLOSE  ANY  ACCOUNT  WHICH  DOES  NOT  HAVE A  CERTIFIED  TAXPAYER
IDENTIFICATION NUMBER.

SHAREHOLDER INFORMATION

   
     Shareholders  will be sent  reports  semi-annually  regarding  the  Series.
General  information  about the Series may be requested by writing the Corporate
Communications/Investor   Relations   Department,   J.  &  W.   Seligman  &  Co.
Incorporated,  100  Park  Avenue,  New  York,  NY 10017  or by  telephoning  the
Corporate   Communications/Investor  Relations  Department  toll-free  at  (800)
221-7844 from all  continental  United States or (212)  850-1864 in the New York
City area.  Information about  shareholder  accounts may be requested by writing
Shareholder  Services,  Seligman  Data Corp.  at the same  address or by calling
toll-free (800) 221-2450 from all continental  United States,  or (212) 682-7600
outside the  continental  United  States.  Seligman Data Corp. may be telephoned
Monday through Friday (except holidays), between the hours of 8:30 a.m. and 6:00
p.m. Eastern time, and calls will be answered by a service representative.
    

     24 HOUR  TELEPHONE  ACCESS IS  AVAILABLE  BY DIALING  (800)  622-4597  ON A
TOUCHTONE PHONE, WHICH PROVIDES INSTANT ACCESS TO PRICE, YIELD, ACCOUNT BALANCE,
MOST RECENT TRANSACTION AND OTHER INFORMATION.  IN ADDITION, ACCOUNT STATEMENTS,
FORM  1099-DIV  AND  CHECKBOOKS  MAY BE ORDERED.  TO INSURE  PROMPT  DELIVERY OF
DISTRIBUTION  CHECKS,  ACCOUNT STATEMENTS AND OTHER  INFORMATION,  SELIGMAN DATA
CORP. SHOULD BE NOTIFIED  IMMEDIATELY IN WRITING OF ANY ADDRESS CHANGE.  ADDRESS
CHANGES  MAY BE  TELEPHONED  TO  SELIGMAN  DATA  CORP.  IF THE  SHAREHOLDER  HAS
TELEPHONE  SERVICES.   FOR  MORE  INFORMATION  ABOUT  TELEPHONE  SERVICES,   SEE
"TELEPHONE TRANSACTIONS" ABOVE.

     ACCOUNT   SERVICES.   Shareholders  are  sent   confirmation  of  financial
transactions  in their  account.  Other investor  services are available.  These
include:

   
     o INVEST-A-CHECK(R)  SERVICE enables a shareholder to authorize  additional
purchases  of  shares  automatically  by  electronic  funds  transfer  from  the
shareholders  savings or checking account, if the shareholder's bank is a member
of the Automated Clearing House ("ACH"), or by preauthorized  checks to be drawn
on the  shareholder's  checking  account at regular  monthly  intervals in fixed
amounts  of $100 or more per  fund,  or  regular  quarterly  intervals  in fixed
amounts  of  $250  or  more  per  fund,  to  purchase  shares.  Accounts  may be
established concurrently with the Invest-A-Check(R)  Service only iF accompanied
by a check for at least $100 in conjunction with the monthly  investment  option
or a check  for at  least  $250 in  conjunction  with the  quarterly  investment
option. By utilizing the Invest-A-Check(R)  Service to establish an account, you
are agreeing to continue the service until the Series' minimum investment amount
is met. If you elect to cancel the service  prior to meeting the  minimum,  your
account may be subject to closure. (See "Terms and Conditions.")
    

     o AUTOMATIC  DOLLAR-COST-AVERAGING  SERVICE  permits a  shareholder  of the
Seligman Cash Management Fund

                                       27
<PAGE>

to exchange a specified amount, at regular monthly intervals in fixed amounts of
$100 or more per fund, or regular  quarterly  intervals in fixed amounts of $250
or more per fund,  from  shares of any  class of the Cash  Management  Fund into
shares of the same class of any other  Seligman  Mutual Fund  registered  in the
same name. The  shareholder's  Cash Management Fund account must have a value of
at least $5,000 at the initiation of the service.  Exchanges will be made at the
public offering price.

   
     o DIVIDENDS FROM OTHER INVESTMENTS permits a shareholder to order dividends
payable on shares of other  companies to be paid to and  invested in  additional
shares of the Series or another  Seligman  Mutual  Fund.  (Dividend  checks must
include the  shareholder's  name,  account number,  the name of the fund and the
class of shares in which the  investment is to be made.) If the dividends are to
be invested in a new fund account,  the first  investment must meet the required
minimum purchase amount for such fund.

     A  shareholder  may also direct that  dividends  payable on shares of other
companies  be  transferred  electronically  to purchase  shares of any  Seligman
Mutual Fund,  if the other  company  provides  this  service.  See  "Purchase of
Shares" or contact Seligman Data Corp. for more information.
    

     o AUTOMATIC CD TRANSFER SERVICE permits a shareholder to instruct a bank to
invest the proceeds of a maturing bank  certificate  of deposit ("CD") in shares
of any  designated  Seligman  Mutual  Fund.  Shareholders  who  wish to use this
service should  contact  Seligman Data Corp. or a broker to obtain the necessary
documentation.  Banks may  charge a  penalty  on CD  assets  withdrawn  prior to
maturity.  Accordingly,  it will not  normally be  advisable  to  liquidate a CD
before its maturity.

   
     o SYSTEMATIC  WITHDRAWAL  PLAN permits  payments in fixed amounts of $50 or
more at regular  intervals  to be made to a  shareholder  who owns or  purchases
shares worth $5,000 or more held as book credits. Payments will be sent by check
to the address designated by the shareholder or, if elected by a shareholder who
has current bank  information  on file with Seligman Data Corp.,  electronically
deposited into the shareholder's  predesignated bank account. Such deposits will
normally be credited to the  shareholder's  bank account in 2 to 3 business days
after the shares are redeemed from the  shareholder's  fund account.  Holders of
Class A shares  purchased  at net asset value  because the  purchase  amount was
$1,000,000  or more  should bear in mind that  withdrawals  will be subject to a
CDSL if made within eighteen months of purchase of such shares. Holders of Class
B and Class D shares may elect to use this plan  immediately,  although  certain
withdrawals may be subject to a CDSL. (See "Terms and Conditions.")

     o DIRECTED  DIVIDENDS  allows a  shareholder  to pay  dividends  to another
person or to direct the payment of such  dividends  to another  Seligman  Mutual
Fund for purchase at net asset value.  Dividends on Class A, Class B and Class D
shares may only be  directed  to shares of the same  class of  another  Seligman
Mutual Fund.
    

     o OVERNIGHT  DELIVERY to service  shareholder  requests is available  for a
$15.00 fee which may be deducted from a shareholder's account, if requested.

     o COPIES OF ACCOUNT  STATEMENTS  will be sent to each  shareholder  free of
charge for the  current  year and most  recent  prior  year.  Copies of year-end
statements  for prior years back to 1985 are  available  for a fee of $10.00 per
year, per account, with a maximum charge of $150 per account. Statement requests
should be forwarded, along with a check, to Seligman Data Corp.

   
     o TAX-DEFERRED PLANS. Shares of the Series may be purchased for:

     -Individual  Retirement Accounts (IRAs),  including  Traditional IRAs, Roth
IRAs and Education IRAs;
    

     -Savings Incentive Match Plans for Employees (SIMPLE IRAs);

     -Simplified Employee Pension Plans (SEPs);

     -Section 401(k) Plans for corporations and their employees;

     -Section 403(b)(7) Plans for employees of public school systems and certain
non-profit  organizations who wish to make deferred  compensation  arrangements;
and

                                       28
<PAGE>

     -Money  Purchase  Pension  and  Profit  Plans  for  sole   proprietorships,
partnerships and corporations.

     These  types of plans may be  established  only upon  receipt  of a written
application  form.  The Fund may register an IRA investment for which an account
application has not been received as an ordinary taxable account.

     For more information,  write Retirement Plan Services, Seligman Data Corp.,
100 Park Avenue,  New York, NY 10017 or telephone  toll-free (800) 445-1777 from
all  continental  United  States.  You also may receive  information  through an
authorized dealer.

ADVERTISING THE SERIES' PERFORMANCE

     From time to time the Series  advertises  its "yield,"  "total  return" and
"average annual total return," each of which are calculated separately for Class
A, Class B and Class D shares.  THESE FIGURES ARE BASED ON  HISTORICAL  EARNINGS
AND ARE NOT INTENDED TO INDICATE FUTURE  PERFORMANCE.  The "yield" of a class of
the Series refers to the income  generated by an investment in that class over a
30-day period.  This income is then  "annualized." That is, the amount of income
generated by the investment during that 30-day period is assumed to be generated
each  30-day  period  for twelve  periods  and is shown as a  percentage  of the
investment. The income earned on the investment is also assumed to be reinvested
at the  end of the  sixth  30-day  period.  The  "total  return"  shows  what an
investment in shares of a class of the Series would have earned over a specified
period  of time (for  example,  one,  five and ten years or from the  inception)
assuming the payment of the maximum sales load, if any, when the  investment was
first  made  and  that  all  distributions  and  dividends  by that  class  were
reinvested  on the  reinvestment  dates during the period.  The "average  annual
total return" is the annual rate required for the initial payment to grow to the
amount which would be received at the end of the specified period (one, five and
ten years or from the  inception);  i.e.,  the average  annual  compound rate of
return.  Total  return and average  annual  total  return may also be  presented
without the effect of the initial sales load or CDSL, as applicable.

     From time to time,  reference  may be made in  advertising  or  promotional
material to performance information, including mutual fund rankings, prepared by
Lipper Analytical Services,  Inc. ("Lipper"),  an independent  reporting service
which monitors the  performance of mutual funds. In calculating the total return
of the Series' Class A, Class B and Class D shares,  the Lipper analysis assumes
investment  of all  dividends  and  distributions  paid but  does not take  into
account  applicable sales loads. The Series may also refer in  advertisements or
in other promotional material to articles, comments, listings and columns in the
financial  press  pertaining  to  the  Series'  performance.  Examples  of  such
financial  and  other  press  publications  include  BARRON'S,   BUSINESS  WEEK,
CDA/WEISENBERGER  MUTUAL FUNDS  INVESTMENT  REPORT,  CHRISTIAN  SCIENCE MONITOR,
FINANCIAL  PLANNING,   FINANCIAL  TIMES,   FINANCIAL  WORLD,  FORBES,   FORTUNE,
INDIVIDUAL INVESTOR,  INVESTMENT ADVISOR, INVESTORS BUSINESS DAILY, KIPLINGER'S,
LOS ANGELES TIMES, MONEY MAGAZINE,  MORNINGSTAR,  INC., PENSION AND INVESTMENTS,
SMART MONEY, THE NEW YORK TIMES, USA TODAY, U.S. NEWS AND WORLD REPORT, THE WALL
STREET JOURNAL, WASHINGTON POST, WORTH MAGAZINE and YOUR MONEY.

ORGANIZATION AND CAPITALIZATION

     The Fund is a diversified, open-end management investment company organized
under the laws of the  Commonwealth of  Massachusetts  by a Declaration of Trust
dated July 27, 1984.  The  Declaration of Trust permits the Trustees to issue an
unlimited number of full and fractional shares of beneficial interest, $.001 par
value. The Trustees also have the power to create additional series of shares.

     Shares of  beneficial  interest of two series have been  authorized,  which
shares  of  beneficial  interest  constitute  interests  in the  Series  and the
Seligman High-Yield Bond Series. Shares of beneficial interest of the Series and
the Seligman  High-Yield  Bond Series are divided into three  classes  (Class A,
Class B and Class D). Each share

                                       29
<PAGE>

of beneficial  interest of the Series' and the Seligman  High-Yield Bond Series'
respective classes is equal as to earnings, assets and voting privileges, except
that each class bears its own separate  distribution and,  potentially,  certain
other class expenses and has exclusive  voting rights with respect to any matter
to  which  a  separate  vote  of  any  class  is  required  by the  1940  Act or
Massachusetts  law. The Fund has adopted a plan (the `Multiclass Plan") pursuant
to Rule 18f-3 under the 1990 Act  permitting  the  issuance and sale of multiple
classes of shares of beneficial interest.  In accordance with the Declaration of
Trust,  the Trustees may authorize the creation of additional  classes of shares
of  beneficial  interest  with  such  characteristics  as are  permitted  by the
Multiclass  Plan and Rule 18f-3.  The 1940 Act requires that where more than one
class exists,  each class must be preferred over all other classes in respect of
assets specifically allocated to such class. Shares entitle their holders to one
vote per share. Shares have noncumulative  voting rights, do not have preemptive
or subscription rights and are transferable. It is the intention of the Fund not
to hold Annual Meetings of Shareholders.  The Trustees may call Special Meetings
of  Shareholders  for action by shareholder  vote as may be required by the 1940
Act or  Declaration  of Trust.  Pursuant to the 1940 Act,  shareholders  have to
approve  the  adoption of any  management  contract,  distribution  plan and any
changes in fundamental investment policies.  Shareholders also have the right to
call a meeting of  shareholders  for the purpose of voting on the removal of one
or more Trustees.  Such removal can be effected upon the action of two-thirds of
the outstanding shares of the Fund.

                                       30
<PAGE>

                              TERMS AND CONDITIONS
                           GENERAL ACCOUNT INFORMATION

   
    Investments will be made in as many shares, including fractions to the third
decimal place,  as can be purchased at the net asset value plus a sales load, if
applicable,  at the close of business on the day payment is received. If a check
received  in payment  of a  purchase  of shares is  dishonored  for any  reason,
Seligman  Data Corp.  may cancel the  purchase  and may also  redeem  additional
shares,  if any, held in the  shareholder's  account in an amount  sufficient to
reimburse  the Fund for any loss it may have incurred and charge a $10.00 return
check fee.  Shareholders  will receive  dividends from investment income and any
distributions  from gain realized on  investments in shares or in cash according
to the option  elected.  Dividend  and gain  options may be changed by notifying
Seligman Data Corp. These option changes must be received by Seligman Data Corp.
before the record date for the dividend or distribution to be effective for such
dividend  or  distribution.   Stock  certificates  will  not  be  issued  unless
requested.   Replacement  stock  certificates  and  certain  waiver  of  probate
procedures will be subject to a surety fee.

                            INVEST-A-CHECK(R) SERVICE
    The  Invest-A-Check(R)  Service  is  available  to  all  shareholders.   The
application is subject to acceptance by thE shareholder's bank and Seligman Data
Corp. The electronic funds transfer ("ACH debit") or preauthorized  check in the
amount specified will be drawn  automatically on the  shareholder's  bank on the
fifth day (unless  otherwise  specified) of each month (or on the prior business
day if such  day of the  month  falls  on a  weekend  or  holiday)  in  which an
investment  is scheduled and invested at the close of business on the same date.
By utilizing  the  Invest-A-Check(R)  Service tO  establish an account,  you are
agreeing to continue the service until the Fund's minimum  investment  amount is
met.  If you elect to cancel the  service  prior to meeting  the  minimum,  your
account  may  be  subject  to  closure.  If  a  check  is  not  honored  by  the
shareholder's  bank,  or if the value of shares  held falls  below the  required
minimum,  the  Invest-A-Check(R)  Service may be suspended.  In the event that a
check or ACH debit is returned as uncollectable, Seligman Data Corp. will cancel
the  purchase,  redeem  shares held in the  shareholder's  account for an amount
sufficient  to reimburse the Fund for any loss it may have incurred as a result,
and  charge a $10.00  return  check  fee.  This  fee will be  deducted  from the
shareholder's  account.  The  Invest-A-Check(R)  Service may be reinstated  upon
written request  indicating  that the cause of interruption  has been corrected.
The Invest-A-Check(R) Service may be terminated by the shareholder's or Seligman
Data Corp. at any time by written  notice.  The  shareholder  agrees to hold the
Fund and its agents free from all  liability  which may result from acts done in
good  faith  and  pursuant  to  these  terms.   Instructions   for  establishing
Invest-A-Check(R)  Service are given on the Account Application.  In the event a
shareholder  exchanges  all of the  shares  from  one  Seligman  Mutual  Fund to
another, the Invest-A-Check(R) Service will be terminated in the Seligman Mutual
Fund  that  was  closed  as a  result  of the  exchange  of all  shares  and the
shareholder  must  re-apply  for the  Invest-A-Check(R)  Service in the Seligman
Mutual  Fund  into  which  the  exchange  was  made.  In the  event of a partial
exchange, the Invest-A-Check(R) Service will be continued,  subject to the above
conditions,  in the  Seligman  Mutual  Fund from  which the  exchange  was made.
Accounts established in conjunction with the  Invest-A-Check(R)  Service must be
accompanied  by a  check  for at  least  $100 in  connection  with  the  monthly
investment  option or a check for at least $250 in connection with the quarterly
investment option. If a shareholder uses the  Invest-A-Check(R)  Service to make
an IRA or group retirement plan  investment,  the purchase will be credited as a
current year contribution.

                           SYSTEMATIC WITHDRAWAL PLAN
    A  sufficient  number of full and  fractional  shares  will be  redeemed  to
provide the amount  required for a scheduled  payment and any  applicable  CDSL.
Redemptions  will be made at the net asset value at the close of business on the
specific  day of each  month  designated  by the  shareholder  (or on the  prior
business day if the day specified  falls on a weekend or holiday),  less, in the
case of Class B or Class D shares, any applicable CDSL.  Systematic  withdrawals
of Class A shares which were  purchased at net asset value  because the purchase
amount was $1,000,000 or more will be subject to a CDSL if made within  eighteen
months  of  purchase  of such  shares.  Under  this  plan,  a Class B or Class D
shareholder  who  requests  both  dividends  and capital gain  distributions  in
additional shares may withdraw up to 12% or 10%,  respectively,  of the value of
the shareholder's fund account (at the time of election) per annum,  without the
imposition  of a CDSL.  A minimum  payment  amount of $50 per cycle is needed to
establish this plan. A shareholder  may change the amount of scheduled  payments
or may suspend  payments by written  notice to Seligman  Data Corp. at least ten
days prior to the effective date of such a change or suspension. The plan may be
terminated  by the  shareholder  or Seligman  Data Corp.  at any time by written
notice.  It will be terminated  upon proper  notification  of the death or legal
incapacity of the shareholder. This plan is considered terminated in the event a
withdrawal of shares, other than to make scheduled withdrawal payments,  reduces
the value of shares remaining on deposit to less than $5,000. Continued payments
in excess of  dividend  income  invested  will  reduce  and  ultimately  exhaust
capital.  Withdrawals,  concurrent with purchases of shares of this or any other
investment  company,   will  be  disadvantageous   because  of  the  payment  of
duplicative sales loads, if applicable. For this reason, additional purchases of
Series shares are discouraged when the Withdrawal Plan is in effect.
    

                     LETTER OF INTENT -- CLASS A SHARES ONLY
    Seligman Financial Services,  Inc. will hold in escrow shares equal to 5% of
the minimum  purchase  amount  specified.  Dividends  and  distributions  on the
escrowed shares will be paid to the shareholder or credited to the shareholder's
account.   Upon  completion  of  the  specified   minimum  purchase  within  the
thirteen-month  period,  all shares  held in escrow will be  deposited  into the
shareholder's account or delivered to the shareholder. A shareholder may include
toward the  completion  of a Letter of Intent the total asset value of shares of
the Seligman Mutual Funds on which an initial sales load was paid as of the date
of the Letter.  If the total amount  invested within the  thirteen-month  period
does not equal or exceed the specified minimum purchase, the shareholder will be
requested  to pay the  difference  between the amount of the sales load paid and
the amount of the sales load  applicable to the total  purchase made. If, within
20 days following the mailing of a written request, the shareholder has not paid
this  additional  sales load to Seligman  Financial  Services  Inc.,  sufficient
escrowed  shares will be  redeemed  for  payment of the  additional  sales load.
Shares  remaining  in  escrow  after  this  payment  will  be  released  to  the
shareholder's account. The intended purchase amount may be increased at any time
during  the  thirteen-month  period by filing a revised  Agreement  for the same
period,  provided that a Dealer furnishes  evidence that an amount  representing
the reduction in sales load under the new Agreement, which becomes applicable on
purchases  already  made under the original  Agreement,  will be refunded to the
Fund and that the required  additional  escrowed shares will be purchased by the
shareholder.

    Shares of Seligman Cash Management Fund, Inc. which have been acquired by an
exchange of shares of another  Seligman Mutual Fund on which there is an initial
sales load may be taken into account in  completing  a Letter of Intent,  or for
Right of  Accumulation.  However,  shares of the Seligman Cash  Management  Fund
which have been  purchased  directly may not be used for purposes of determining
reduced sales loads on additional purchases of the other Seligman Mutual Funds.

                            CHECK REDEMPTION SERVICE
    The Check Redemption Service is available to Class A shareholders,  to Class
B shareholders  and to Class D shareholders  with respect to Class D shares held
for one year or more. For Class A shares which were purchased at net asset value
because the purchase amount was $1,000,000 or more, check redemptions  within 18
months of purchase may be subject to a CDSL. Check redemptions of Class B shares
also  may be  subject  to a CDSL.  If  shares  are  held  in  joint  names,  all
shareholders must sign the Check Redemption section of the Account  Application.
All checks will require all  signatures  unless a lesser  number is indicated in
the Check Redemption  section.  Accounts in the names of  corporations,  trusts,
partnerships,  etc. must list all  authorized  signatories.  In all cases,  each
signature guarantees the genuineness of the other signatures.  Checks may not be
drawn for less than $500.

    The shareholder authorizes Boston Safe Deposit and Trust Co. to honor checks
drawn by the shareholder on the account of Seligman U.S.  Government  Securities
Series and to effect a redemption of sufficient shares in the shareholder's Fund
account to cover payment of the check and any applicable  CDSL. The  shareholder
understands  that  shares  in one  series  cannot be  redeemed  to cover a check
written on another series.

    Boston  Safe  Deposit  and  Trust  Co.  shall  be  liable  only  for its own
negligence.  The Fund will not be liable for any loss,  expense or cost  arising
out of check  redemptions.  The Fund  reserves  the right to  change,  modify or
terminate  this service at any time upon  notification  mailed to the address of
record of the shareholder(s).

    Seligman  Data  Corp.  will  charge a $10.00  processing  fee for any  check
redemption draft returned as uncollectable. This charge may be deducted from the
account  against  which the check was  drawn.  No  redemption  proceeds  will be
remitted to a  shareholder  with respect to shares  purchased  by check  (unless
certified) until Seligman Data Corp.  receives notice that the check has cleared
which may be up to 15 days from the  credit of the  shares to the  shareholder's
account.

                                                                            5/98

                                       31
<PAGE>


                       This page intentionally left blank.


<PAGE>

                                    SELIGMAN
                       U.S. GOVERNMENT SECURITIES SERIES

                       SELIGMAN FINANCIAL SERVICES, INC.
                                AN AFFILIATE OF
                                     [LOGO]
                             J.& W. SELIGMAN & CO.
                                  INCORPORATED

                                ESTABLISHED 1864
                      100 PARK AVENUE, NEW YORK, NY 10017

TXUSG1 5/98



<PAGE>





      S E L I G M A N
- ---------------------
      High-Yield Bond
               Series







                                                        (PICTURE)
 
                                                        PROSPECTUS

                                                          ------
    
                                                        MAY 1, 1998
    









                                                          [LOGO]
                                                 J. & W. SELIGMAN & CO.
                                                       INCORPORATED
                                                     ESTABLISHED 1864
                                                               
<PAGE>

TABLE OF CONTENTs

SUMMARY OF SERIES EXPENSES   2

FINANCIAL HIGHLIGHTS   3

ALTERNATIVE DISTRIBUTION SYSTEM   5

INVESTMENT OBJECTIVE, POLICIES AND RISKS   7

MANAGEMENT SERVICES   10

PURCHASE OF SHARES   11

TELEPHONE TRANSACTIONS   18

REDEMPTION OF SHARES   19

ADMINISTRATION, SHAREHOLDER SERVICES
  AND DISTRIBUTION PLAN   22

EXCHANGE PRIVILEGE   23

FURTHER INFORMATION ABOUT
  TRANSACTIONS IN THE SERIES   24

   
DIVIDENDS AND CAPITAL GAIN DISTRIBUTIONS   25
    

FEDERAL INCOME TAXES   26

SHAREHOLDER INFORMATION   27

ADVERTISING THE SERIES' PERFORMANCE   29

ORGANIZATION AND CAPITALIZATION   30


TIMES CHANGE ... VALUES ENDUE


<PAGE>

                         SELIGMAN HIGH-YIELD BOND SERIES

                                   a series of
                        Seligman High Income Fund Series
 100 Park Avenue o New York, NY 10017 o New York City Telephone: (212) 850-1864
   
                          Toll-Free Telephone: (800) 221-2450
    
      For Retirement Plan Information--Toll-Free Telephone: (800) 445-1777

   
                                                                     May 1, 1998
     Seligman  High Income Fund Series (the "Fund") is a  diversified,  open-end
management  investment  company  that offers two series  which each seek to earn
high  current  income  by  investing  in  debt  securities  but  have  different
investment   objectives  and  investment   policies.   Investment  advisory  and
management  services  are  provided  to  the  Fund  by J.  & W.  Seligman  & Co.
Incorporated  (the  "Manager");  the Fund's  distributor  is Seligman  Financial
Services, Inc., an affiliate of the Manager.
    

     The  investment  objective  of the  SELIGMAN  HIGH-YIELD  BOND  SERIES (the
"Series") is to produce maximum current income.  The Series seeks to achieve its
objective by investing primarily in high-yielding, high risk corporate bonds and
corporate notes, which, generally, are unrated or carry ratings lower than those
assigned to investment  grade bonds by Standard & Poor's Rating Service  ("S&P")
or Moody's Investors Service, Inc.  ("Moody's").  An investment in the Series is
appropriate  for you only if you can bear the high risk inherent in investing in
such securities. There can, of course, be no assurance that the Series will meet
its objective.

     THE SERIES WILL INVEST UP TO 100% OF ITS  PORTFOLIO  IN LOWER RATED  BONDS,
COMMONLY  KNOWN AS "JUNK  BONDS," WHICH ARE SUBJECT TO A GREATER RISK OF LOSS OF
PRINCIPAL  AND INTEREST  THAN HIGHER RATED  INVESTMENT  GRADE BONDS.  PURCHASERS
SHOULD  CAREFULLY  ASSESS THE RISKS ASSOCIATED WITH AN INVESTMENT IN THE SERIES.
SEE "INVESTMENT OBJECTIVE, POLICIES AND RISKS."

   
     The Series offers three classes of shares.  Class A shares are sold subject
to an initial  sales  load of up to 4.75% and an annual  service  fee  currently
charged  at a rate of up to .25% of the  average  daily net  asset  value of the
Class A shares.  Class A shares purchased in an amount of $1,000,000 or more are
sold  without an initial  sales load but are  subject to a  contingent  deferred
sales load ("CDSL") of 1% on  redemptions  within  eighteen  months of purchase.
Class B shares are sold without an initial sales load but are subject to a CDSL,
if  applicable,  of 5% on  redemptions  in the first year after purchase of such
shares,  declining  to 1% in  the  sixth  year  and  0%  thereafter,  an  annual
distribution  fee of .75% and an annual service fee of up to .25% of the average
daily  net  asset  value of the  Class B  shares.  Class B shares  will  convert
automatically  to Class A shares on the last day of the month that  precedes the
eighth anniversary of their date of purchase. Class D shares are sold without an
initial sales load but are subject to a CDSL of 1% imposed on redemptions within
one year of  purchase,  an annual  distribution  fee of up to .75% and an annual
service  fee of up to .25% of the  average  daily net asset value of the Class D
shares.  Any CDSL payable upon  redemption  of Class B or Class D shares will be
assessed on the lesser of the current net asset value or the  original  purchase
price of the shares redeemed. No CDSL will be imposed on shares acquired through
the reinvestment of dividends or gain  distributions  received from any class of
shares.  See  "Alternative  Distribution  System."  Shares of the  Series may be
purchased through any authorized investment dealer.
    

     This Prospectus sets forth concisely the information a prospective investor
should know about the Series before  investing.  Please read it carefully before
you invest and keep it for future  reference.  Additional  information about the
Series, including a Statement of Additional Information, has been filed with the
Securities and Exchange Commission.  The Statement of Additional  Information is
available  upon request and without charge by calling or writing the Fund at the
telephone  numbers or the address set forth above.  The  Statement of Additional
Information is dated the same date as this Prospectus and is incorporated herein
by reference in its entirety.

SHARES IN THE FUND ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
    BY, ANY BANK, AND SHARES ARE NOT FEDERALLY INSURED BY THE FEDERAL DEPOSIT
      INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER AGENCY.

THESE SECURITIES HAVE NOT  BEEN  APPROVED OR  DISAPPROVED BY  THE SECURITIES AND
  EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
     AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON
     THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE
           CONTRARY IS A CRIMINAL OFFENSE. SUMMARY OF SERIES EXPENSES

<PAGE>

                         SUMMARY OF SERIES OF EXPENSES

<TABLE>
<CAPTION>
                                                                             CLASS A          CLASS B            CLASS D
                                                                        ---------------- ----------------   ----------------
                                                                         (INITIAL SALES   (DEFERRED SALES    (DEFERRED SALES
                                                                              LOAD             LOAD               LOAD
                                                                           ALTERNATIVE)    ALTERNATIVE)       ALTERNATIVE)
<S>                                                                    <C>                 <C>              <C>
SHAREHOLDER TRANSACTION EXPENSES
  Maximum Sales Load Imposed on Purchases
    (as a percentage of offering price) .............................        4.75%               None              None
  Sales Load on Reinvested Dividends ................................         None               None              None
  Deferred Sales Load (as a percentage of original purchase price
    or redemption proceeds, whichever is lower)......................        None;         5% in 1st year    1% in 1st year
                                                                          except 1% in     4% in 2nd year    None thereafter
                                                                         first 18 months   3% in 3rd and
                                                                        if initial sales    4th years
                                                                         load was waived   2% in 5th year
                                                                       in full due to size 1% in 6th year
                                                                           of purchase     None thereafter

  Redemption Fees ...................................................         None               None              None
  Exchange Fees .....................................................         None               None              None

</TABLE>
   
<TABLE>
<CAPTION>
                                                                             CLASS A          CLASS B            CLASS D
                                                                            --------         --------           --------
<S>                                                                          <C>                <C>               <C>
ANNUAL FUND OPERATING EXPENSES  FOR 1997 
  (as a percentage of average net assets)
  Management Fees ...................................................         .62%               .62%              .62%
  12b-1 Fees ........................................................         .24%              1.00%*            1.00%*
  Other Expenses ....................................................         .28%               .28%              .28%
                                                                             -----              -----             -----
  Total Series Operating Expenses ...................................        1.14%              1.90%             1.90%
                                                                             =====              =====             =====
</TABLE>
    

     The  purpose  of this table is to assist  investors  in  understanding  the
various costs and expenses which shareholders of the Series may bear directly or
indirectly.  The sales load on Class A shares is a one-time  charge  paid at the
time of purchase of shares.  Reductions  in initial sales loads are available in
certain  circumstances.  Class A shares are not subject to an initial sales load
for purchases of $1,000,000 or more;  however such shares are subject to a CDSL,
a one-time  charge,  only if the shares are redeemed  within  eighteen months of
purchase. The CDSLs on Class B and Class D shares are one-time charges paid only
if shares are redeemed  within six years or one year of purchase,  respectively.
For  More  information  concerning  reductions  in  sales  loads  and for a more
complete  description  of the  various  costs and  expenses,  see  "Purchase  of
Shares,"  "Redemption of Shares" and "Management  Services" herein.  The Series'
Administration,  Shareholder Services and Distribution Plan to which the caption
"12b-1 Fees" relates, is discussed under  "Administration,  Shareholder Services
and Distribution Plan" herein.

   
<TABLE>
<CAPTION>
EXAMPLE                                                                       1 YEAR      3 YEARS    5 YEARS    10 YEARS
- --------                                                                      ------      -------    -------    --------
<S>                                                                  <C>        <C>        <C>         <C>        <C>
Aninvestor  would pay the following  expenses on a $1,000
  investment,  assuming (1) 5% annual return and (2)
  redemption at the end of each time period.......................   Class A     $59        $82        $107       $180
                                                                     Class B+     69         90         123        202
                                                                     Class D      29         60         103        222
An investor would pay the following expenses on the same
   investment, assuming no redemption...........................      Class A    $59        $82        $107       $180
                                                                      Class B+    19         60         103        202
                                                                      Class D     19         60         103        222
</TABLE>
    
THE  EXAMPLE  SHOULD  NOT BE  CONSIDERED  A  REPRESENTATION  OF PAST  OR  FUTURE
EXPENSES.  ACTUAL  EXPENSES  MAY BE GREATER OR LESS THAN THOSE  SHOWN AND THE 5%
ANNUAL RETURN USED IN THIS EXAMPLE IS A HYPOTHETICAL RATE.

- ----------
 * Includes  an annual  distribution  fee of .75% and an annual  service  fee of
   .25%.  Pursuant  to the  Rules  of the  National  Association  of  Securities
   Dealers,  Inc., the aggregate  deferred  sales loads and annual  distribution
   fees on Class B and  Class D shares of the  Series  may not  exceed  6.25% of
   total gross sales,  subject to certain  exclusions.  The maximum sales charge
   rule is applied  separately to each class. The 6.25% limitation is imposed on
   the Series rather than on a per  shareholder  basis.  Therefore,  a long-term
   Class  D  shareholder  of the  Series  may  pay  more in  total  sales  loads
   (including  distribution fees) than the economic  equivalent of 6.25% of such
   shareholder's investment in such shares.

   
+  The expenses shown for the ten-year period reflect  the conversion of Class B
   shares to Class A shares after 8 years.
    

                                       2

<PAGE>


                              FINANCIAL HIGHLIGHTS

   
     The  financial  highlights  for the  Series'  Class A,  Class B and Class D
shares for the periods  presented  below have been  audited by Deloitte & Touche
LLP, independent auditors. This information, which is derived from the financial
and  accounting  records of the Series  should be read in  conjunction  with the
financial statements and notes contained in the Fund's 1997 Annual Report, which
is incorporated by reference in the Fund's Statement of Additional  Information,
copies of which may be obtained  free of charge  from the Fund at the  telephone
numbers or address provided on the cover page of this Prospectus.

     Per share  operating  performance  data is designed to allow  investors  to
trace the operating  performance,  on a per share basis,  from the beginning net
asset  value to the  ending  net asset  value so that they can  understand  what
effect the  individual  items  have on their  investment,  assuming  it was held
throughout  the  period.  Generally,  the  per  share  amounts  are  derived  by
converting the actual dollar amounts incurred for each item, as disclosed in the
financial statements, to their equivalent per share amount.

     "Total return based on net asset value"  measures each Class's  performance
assuming  investors  purchased shares of the Series at the net asset value as of
the  beginning of the period,  invested  dividends and capital gains paid at net
asset  value and then sold their  shares at the net asset value per share on the
last day of the period.  The total return  computations do not reflect any sales
loads  investors may incur in purchasing or selling shares of the Series.  Total
returns for periods of less than one year are not annualized.

<TABLE>
<CAPTION>
                                                                         CLASS A
                         ------------------------------------------------------------------------------------------------------
                                                                 YEAR ENDED DECEMBER 31,
                         ------------------------------------------------------------------------------------------------------

                                        1997     1996     1995     1994      1993     1992    1991     1990      1989      1988    
                                      ------- -------   -------   -------  -------  ------- --------  -------   -------   ------
<S>                                    <C>     <C>       <C>     <C>        <C>      <C>     <C>       <C>     <C>        <C>

PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of year..  $  7.25   $  6.96   $ 6.35  $ 6.94    $ 6.42   $ 5.96  $ 5.21   $ 6.40    $ 7.02   $ 7.07
                                      -------   -------   ------  ------    ------   ------  ------   ------    ------   ------
Net investment income ..............      .70       .69      .65     .65       .66      .69     .77      .78       .89      .82
Net realized and unrealized
  investment gain (loss) ...........      .28       .29      .61    (.59)      .52      .46     .75    (1.19)     (.62)    (.05)
                                      -------   -------   ------   -----    ------   ------  ------   ------    ------   ------
Increase (decrease) from
  investment operations ............      .98       .98     1.26     .06      1.18     1.15    1.52     (.41)      .27      .77
Dividends paid or declared .........     (.68)     (.69)    (.65)   (.65)     (.66)    (.69)   (.77)    (.78)     (.89)    (.82)
                                      -------   -------   ------   -----    ------   ------  ------   ------    ------   ------
Net increase (decrease) in
  net asset value ..................      .30       .29      .61    (.59)      .52      .46     .75    (1.19)     (.62)    (.05)
                                      -------   -------   ------   -----    ------   ------  ------   ------    ------   ------
Net asset value, end of year .......   $ 7.55    $ 7.25   $ 6.96  $ 6.35    $ 6.94   $ 6.42  $ 5.96   $ 5.21    $ 6.40   $ 7.02
                                      =======   =======  =======  ======    =======  ======  ======   ======    ======   ======
TOTAL RETURN BASED ON NET ASSET VALUE:  14.26%    14.82%   20.72%   0.78%    19.19%   20.08%  30.70%   (7.27)%    3.84%   11.38%
RATIOS/SUPPLEMENTAL DATA:
Expenses to average net assets .....     1.14%     1.16%    1.09%   1.13%     1.20%    1.21%   1.29%    1.21%     1.13%    1.14%
Net investment income to
  average net assets ...............     9.42%     9.80%    9.73%   9.73%     9.68%   10.82%  13.36%   13.40%    13.02%   11.41%
Portfolio turnover .................    61.78%   119.33%  173.39% 184.75%   193.91%  145.66% 181.08%  117.51%   135.17%   95.20%
Net assets, end of year
  (000s omitted) ...................  $750,461  $408,303 $182,129 $59,033   $61,333  $40,802 $32,287  $27,558   $45,511  $62,268
</TABLE>
    
- ------------
     The data  provided  above  reflects  historical  information  and therefore
through  December  31, 1995 does not  reflect the effect of the  increase in the
management fee rate payable by the Series, which was approved by shareholders on
December 12, 1995 and became effective on January 1, 1996.

                                       3

<PAGE>

                        FINANCIAL HIGHLIGHTS (continued)
   
<TABLE>
<CAPTION>
                                            CLASS B                                     CLASS D
                                     ---------------------     ---------------------------------------------------------
                                       YEAR       4/22/96*               YEAR ENDED DECEMBER 31,                9/21/93*
                                       ENDED        TO         -------------------------------------------          TO
                                     12/31/97    12/31/96       1997        1996        1995         1994      12/31/93
                                     --------    --------       -----       -----       -----        -----     --------
<S>                                   <C>          <C>         <C>         <C>          <C>         <C>          <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period  $7.26        $7.06       $7.26       $6.96        $6.35       $6.94        $6.74
                                      -----        -----       -----       -----        -----       -----        -----
Net investment income .............     .64          .45         .64         .64          .60         .57          .12
Net realized and unrealized
  investment gain (loss) ..........     .28          .20         .28         .30          .61        (.59)         .20
                                      -----        -----       -----       -----        -----       -----        -----
Increase (decrease) from
  investment operations ...........     .92          .65         .92         .94         1.21        (.02)         .32
Dividends paid or declared ........    (.63)        (.45)       (.63)       (.64)        (.60)       (.57)        (.12)
                                      -----        -----       -----       -----        -----       -----        -----
Net increase (decrease) in
  net asset value .................     .29          .20         .29         .30          .61        (.59)         .20
                                      -----        -----       -----       -----        -----       -----        -----
Net asset value, end of period ....   $7.55        $7.26       $7.55       $7.26        $6.96       $6.35        $6.94
                                      =====        =====       =====       =====        =====       =====        =====
TOTAL RETURN BASED ON NET 
  ASSET VALUE:                        13.24%        9.11%      13.24%      14.10%       19.67%       (.30)%       4.53%
RATIOS/SUPPLEMENTAL DATA:
Expenses to average net assets ....    1.90%        1.90%+      1.90%       1.92%        1.91%       2.19%        2.04%+
Net investment income to
  average net assets ..............    8.66%        9.11%+      8.66%       9.02%        8.86%       8.68%        7.93%+
Portfolio turnover ................   61.78%      119.33%+++   61.78%     119.33%      173.39%     184.75%      193.91%++
Net assets, end of period
  (000s omitted) .................. $581,235     $147,970    $534,998    $265,528      $90,153      $9,249       $2,375
</TABLE>
    
- ----------
   * Commencement of offering of shares.
   + Annualized.
  ++ For the year ended December 31, 1993.
 +++ For the year ended December 31, 1996.


     The data  provided  above  reflects  historical  information  and therefore
through  December  31, 1995 does not  reflect the effect of the  increase in the
management fee rate payable by the Series, which was approved by shareholders on
December 12, 1995 and became effective on January 1, 1996.



                                       4

<PAGE>


ALTERNATIVE DISTRIBUTION SYSTEM

     The Series  offers  three  classes  of  shares.  Class A shares are sold to
investors who have concluded that they would prefer to pay an initial sales load
and have  the  benefit  of lower  continuing  fees.  Class B shares  are sold to
investors choosing to pay no initial sales load, a higher distribution fee and a
CDSL with  respect to  redemptions  within six years of purchase  and who desire
shares to convert  automatically  to Class A shares after eight  years.  Class D
shares are sold to  investors  choosing to pay no initial  sales load,  a higher
distribution fee and, with respect to redemptions within one year of purchase, a
CDSL. The Alternative  Distribution System allows investors to choose the method
of  purchasing  shares  that is most  beneficial  in light of the  amount of the
purchase,  the  length  of time the  shares  are  expected  to be held and other
relevant   circumstances.   Investors  should  determine   whether  under  their
particular  circumstances it is more advantageous to incur an initial sales load
and be subject to lower  ongoing  charges,  as discussed  below,  or to have the
entire  initial  purchase  price  invested  in the  Series  with the  investment
thereafter being subject to higher ongoing fees and either a CDSL for a six-year
period with  automatic  conversion to Class A shares after eight years or a CDSL
for a one-year period with no automatic conversion to Class A shares.

     Investors who expect to maintain their investment for an extended period of
time  might  also  choose  to  purchase  Class A shares  because  over  time the
accumulated  continuing  distribution  fees of Class B and  Class D  shares  may
exceed the  initial  sales load and lower  ongoing  fee of Class A shares.  This
consideration  must be weighed  against the fact that the amount invested in the
Fund will be reduced by the initial sales load on Class A shares deducted at the
time of purchase. Furthermore, the higher distribution fees on Class B and Class
D Shares will be offset to the extent any return is  realized on the  additional
funds initially invested therein that would have been equal to the amount of the
initial sales load on Class A shares.

     Investors who qualify for reduced  initial sales loads,  as described under
"Purchase of Shares" below, might also choose to purchase Class A shares because
the sales load deducted at the time of purchase would be less or waived in full.
However,  investors  should consider the effect of the 1% CDSL imposed on shares
on which the initial sales load was waived  because the amount of Class A shares
purchased was $1,000,000 or more. In addition,  Class B shares will be converted
automatically to Class A shares after a period of approximately eight years, and
thereafter  investors  will be subject to lower ongoing fees.  Shares  purchased
through  reinvestment of dividends and distributions on Class B shares also will
convert  automatically  to Class A shares  along with the  underlying  shares on
which they were earned.

     Alternatively,  some  investors  might  choose  to have all of their  funds
invested  initially in Class B or Class D shares although remaining subject to a
higher  continuing  distribution  fee and, for a six-year or one-year  period, a
CDSL as  described  below.  For  example,  an investor  who does not qualify for
reduced  sales  loads would have to hold Class A shares for more than 6.33 years
for the Class B or Class D  distribution  fee to exceed the  initial  sales load
plus the  distribution  fee on Class A shares.  This  example does not take into
account the time value of money, which further reduces the impact of the Class B
and Class D shares' 1% distribution  fee, other expenses  charged to each class,
fluctuations  in net asset  value or the effect of the return on the  investment
over this period of time.

     Investors  should bear in mind that total asset based sales charges  (i.e.,
the higher continuing distribution fee plus the CDSL) on Class B shares that are
redeemed may exceed the total asset based sales charges that would be payable on
the same amount of Class A or Class D shares, particularly if the Class B shares
are redeemed  shortly after purchase or if the investor  qualifies for a reduced
sales load on the Class A shares.

     Investors  should  understand  that the purpose and function of the initial
sales load (and deferred sales load,  when  applicable)  with respect to Class A
shares is the same as those of the deferred sales loads and higher  distribution
fees with  respect  to Class B and  Class D shares  in that the sales  loads and
distribution  fees  applicable  to each class  provide for the  financing of the
distribution of the shares of the Series.



                                       5
<PAGE>

     Class B and Class D shares  are  subject to the same  ongoing  distribution
fees but Class D shares are subject to a CDSL for a shorter  period of time (one
year as opposed  to six years)  than  Class B shares.  However,  unlike  Class D
shares,  Class B shares  automatically  convert  to Class A  shares,  which  are
subject to lower ongoing fees.

     The three classes of shares  represent  interests in the same  portfolio of
investments,  have the same rights and are  generally  identical in all respects
except that each class bears its separate distribution and, potentially, certain
other class expenses and has exclusive  voting rights with respect to any matter
to which a separate vote of any class is required by the Investment  Company Act
of 1940,  as amended  (the "1940  Act"),  or  Massachusetts  law. The net income
attributable  to each  class and  dividends  payable on the shares of each class
will be reduced by the amount of distribution  and other expenses of each class.
Class B and Class D shares bear higher  distribution  fees, which will cause the
Class B and Class D shares to pay lower  dividends than the Class A shares.  The
three classes also have separate exchange privileges.

     The  Trustees of the Fund  believe  that no conflict of interest  currently
exists  between  the Class A,  Class B and Class D shares of the  Series.  On an
ongoing basis, the Trustees, in the exercise of their fiduciary duties under the
1940 Act and  Massachusetts  law,  will  seek to  ensure  that no such  conflict
arises. For this purpose, the Trustees will monitor the Series for the existence
of any  material  conflict  among the  classes  and will take such  action as is
reasonably necessary to eliminate any such conflicts that may develop.

     DIFFERENCES BETWEEN CLASSES. The primary differences between Class A, Class
B and Class D shares are their sales load structures and ongoing expenses as set
forth below. The primary differences between Class B and Class D shares are that
Class D shares are  subject to a shorter  CDSL  period and a lower CDSL rate but
Class B  shares  automatically  convert  to Class A Shares  after  eight  years,
resulting in a reduction  in ongoing  fees.  Investors in Class B shares  should
take into account  whether  they intend to redeem  their shares  within the CDSL
period and, if not,  whether they intend to remain invested until the end of the
conversion  period and thereby take  advantage of the  reduction in ongoing fees
resulting from the conversion to Class A shares.  Other investors,  however, may
elect to purchase Class D shares if they determine  that it is  advantageous  to
have all their assets invested initially and they are uncertain as to the length
of time they intend to hold their  assets in the Fund or another  mutual fund in
the Seligman Group for which the exchange privilege is available. Although Class
D shareholders  are subject to a shorter CDSL period at a lower rate, they forgo
the Class B automatic  conversion  feature,  making their investment  subject to
higher  distribution  fees for an  indefinite  period  of time.  Each  class has
advantages  and  disadvantages  for different  investors,  and investors  should
choose the class that best suits their circumstances and their objectives.

                          ANNUAL 12b-1 FEES
          INITIAL        (AS A % OF AVERAGE
         SALES LOAD        DAILY NET ASSETS    OTHER INFORMATION
         ----------        ---------------     ---------------
CLASS A  Maximum initial   Service fee of      Initial sales load
         sales load of     .25%.               waived or
         4.75% of the                          reduced for
         public offering                       certain
         price.                                purchases.
                                               CDSL of 1% on
                                               redemptions within
                                               18 months of purchase
                                               on shares on which
                                               initial sales load was
                                               waived in full due to
                                               the size of the
                                               purchase.
                          
CLASS B  None              Service fee of      CDSL of:
                           .25%; Distribution  5% in 1st year
                           fee of .75% until   4% in 2nd year
                           conversion.*        3% in 3rd and
                                               4th  years
                                               2% in 5th year 
                                               1% in 6th year 0%
                                               after 6th year.

CLASS D  None              Service fee of      CDSL of 1% on
                           .25%; Distribution  redemptions
                           fee of up to .75%.  within one year
                                               of purchase.
                        
*Conversion  occurs at the end of the month which  precedes the 8th  anniversary
 of the purchase date. If Class B shares of the Series are exchanged for Class B
 shares of another Seligman Mutual Fund, the conversion period applicable to the
 Class B shares  acquired in the exchange will apply,  and the holding period of
 the  shares  exchanged  will be tacked  onto the  holding  period of the shares
 acquired.

                                       6
<PAGE>

INVESTMENT OBJECTIVE, POLICIES
AND RISKS

     The Fund is a diversified open-end management  investment company organized
under the laws of the  Commonwealth of  Massachusetts  by a Declaration of Trust
dated July 27, 1984. The Fund offers one other separate  investment  series: the
Seligman U.S.  Government  Securities  Series.  The U.S.  Government  Securities
Series' investment  objective and policies and other important  information with
respect to its operations are set forth in a separate Prospectus.

     The  objective of this Series is to produce  maximum  current  income.  The
Series  seeks to achieve its  objective  by following a policy of investing in a
diversified range of high-yield,  high-risk,  medium and lower quality corporate
bonds and notes,  commonly  referred to as "junk  bonds."  Generally,  bonds and
notes  providing  the highest  yield are unrated or carry lower  ratings (Baa or
lower by Moody's or BBB or lower by S&P) than those  assigned  by S&P or Moody's
to investment-grade bonds and notes. A description of the S&P and Moody's rating
categories  is set forth in the  Appendix to this  Prospectus.  While  providing
higher  yields,  these bonds and notes are  subject to greater  risks of loss of
principal and income than higher-rated  bonds and notes and are considered to be
predominantly  speculative with respect to the issuer's capacity to pay interest
and repay principal. They are also generally considered to be subject to greater
price volatility due to market risks than  higher-rated  bonds and notes.  There
can be no assurance that the Series' investment objective will be attained.

       
     The  value  of the  Series'  bonds  and  notes  will be  affected  like all
fixed-income  securities by market conditions  relating to changes in prevailing
interest rates. However, the value of lower-rated or unrated corporate bonds and
notes is also  affected by  investors'  perceptions.  When  economic  conditions
appear to be deteriorating, lower-rated or unrated corporate bonds and notes may
decline in market value due to investors'  heightened  concerns and  perceptions
over  credit  quality.  If a security is  downgraded,  the Series may retain the
security.  The Series invests in "zero coupon"  (interest  payments accrue until
maturity) and  "pay-in-kind"  (interest  payments are made in cash or additional
shares) bonds.  Such securities may be subject to greater  fluctuations in value
as they tend to be more speculative than income bearing securities. Fluctuations
in  the  market  prices  of  the  securities  owned  by  the  Series  result  in
corresponding  fluctuations  and volatility in the net asset value of the shares
of the  Series.  Additionally,  because  they do not pay current  income,  these
securities will detract from the Series'  objective of producing maximum current
income.

     Lower-rated  and  unrated  corporate  bonds and  notes in which the  Series
invests are traded  principally by dealers in the  over-the-counter  market. The
market  for  these  securities  may be less  active  and  less  liquid  than for
higher-rated  securities.  Under  adverse  market or  economic  conditions,  the
secondary market for these bonds and notes could contract  further,  causing the
Series difficulties in valuing and selling the securities in its portfolio.

   
     The ratings of  fixed-income  securities by Moody's and S&P are a generally
accepted  barometer  of credit  risk.  They are,  however,  subject  to  certain
limitations  from an investor's  standpoint.  The rating of an issuer is heavily
weighted by past  developments and does not necessarily  reflect probable future
conditions.  There is  frequently  a lag between the time the rating is assigned
and the  time it is  updated.  In  addition  there  may be  varying  degrees  of
difference in credit risk of securities within each rating category.
    



                                       7
<PAGE>

   
     The  following  table sets forth the weighted  average  percentages  of the
Series'  portfolio  invested in debt  securities for each rating category during
the year ended December 31, 1997. When securities receive different ratings from
S&P and Moody's, the table reflects the lower rating.

                                             PERCENTAGE OF
           S&P/MOODY'S RATINGS             TOTAL INVESTMENTS
           -------------------              ---------------

AAA/Aaa................................           --
AA/Aa..................................           --
A/A....................................           --
BBB/Baa................................           --
BB/Ba..................................           .4%
B/B....................................         83.2%
CCC/Caa................................          6.2%
CC/Ca..................................           --
Non-rated..............................          3.6%
    

     The  Manager  will  try to  minimize  the  risk  inherent  in  the  Series'
investment  objective through credit analysis,  diversification and attention to
current  developments  and trends in  interest  rates and  economic  conditions.
However,  there can be no assurance that losses will not occur and an investment
in the Series is  appropriate  for an investor only if the investor can bear the
high  risk  inherent  in  seeking   maximum   current  income  by  investing  in
high-yielding corporate bonds and notes which are unrated or carry lower ratings
than those assigned by S&P or Moody's to investment-grade bonds.
   
     Except for temporary defensive  purposes,  at least 80% of the value of the
Series'  total  assets  will  be  invested  in  high-yielding,  income-producing
corporate bonds. This investment  policy is a fundamental  policy and may not be
changed  by the  Trustees  of the Fund  without  the vote of a  majority  of the
Series'  outstanding voting  securities.  The Series may invest up to 20% of the
value of its total  assets in a range of  high-yield,  medium and lower  quality
corporate notes; short-term money market instruments,  including certificates of
deposit  of banks  having  total  assets of more than $1  billion  and which are
members of the FDIC, bankers' acceptances and  interest-bearing  savings or time
deposits of such banks;  commercial paper of prime quality,  rated A-1 or higher
by S&P or P-1 or higher by Moody's or, if not rated,  issued by companies  which
have an  outstanding  debt  issue  rated AA or  higher by S&P or Aa or higher by
Moody's;  securities issued,  guaranteed or insured by the U.S. Government,  its
agencies  and  instrumentalities;  and other  income-producing  cash items.  The
Series  may invest  temporarily  for  defensive  purposes  without  limit in the
foregoing securities.
    
     PREFERRED  STOCK.  In accordance  with its  objective of producing  maximum
current income, the Series may invest up to 10% of its total assets in preferred
stock,  including  non-investment grade preferred stock. Certain preferred stock
issues may offer higher yields than similar bond issues because their rights are
subordinated to the bonds. Consequently, such preferred stock issues will have a
greater  risk  potential.  The Manager  will try to minimize  this  greater risk
potential  through its investment  process.  However,  there can be no assurance
that losses will not occur and, as stated above,  an investment in the Series is
appropriate  only for an investor who can bear the high risk in seeking  maximum
current   income   by   investing   in   high-yielding   securities,   including
non-investment grade preferred stock.

     FOREIGN SECURITIES.  The Series may invest up to 10% of its total assets in
debt  securities  of  foreign  issuers.  Foreign  investments  may  be  affected
favorably  or  unfavorably  by changes in currency  rates and  exchange  control
regulations.  There may be less  information  available  about a foreign company
than about a U.S. company, and foreign companies may not be subject to reporting
standards and  requirements  comparable to those  applicable to U.S.  companies.
Foreign  debt  securities  and  their  markets  may  not be as  liquid  as  U.S.
securities  and their  markets.  Securities  of foreign  companies  may  involve
greater market risk than  securities of U.S.  companies,  and foreign  brokerage
commissions  and custody fees are  generally  higher than in the United  States.
Investments in foreign debt  securities may also be subject to local economic or
political risks, such as political  instability of some foreign  governments and
the possibility of nationalization of issuers.

     ILLIQUID  SECURITIES.  The Series may invest up to 15% of its net assets in
illiquid  securities,  including  restricted  securities  (i.e.,  securities not
readily  marketable  without  registration under the Securities Act of 1933 (the
"1933  Act")) and other  securities  that are not  readily  marketable,  such as
repurchase  agreements of more than one week's  duration.  A Series may purchase
restricted


                                       8
<PAGE>

securities that may be offered and sold only to "qualified institutional buyers"
under Rule 144A of the 1933 Act, and the Manager,  acting pursuant to procedures
approved by the Fund's Board of Directors, may determine, when appropriate, that
specific Rule 144A  securities  are liquid and not subject to the 15% limitation
on illiquid securities.  Should this determination be made, the Manager,  acting
pursuant to such procedures,  will carefully  monitor the security  (focusing on
such factors, among others, as trading activity and availability of information)
to  determine  that the Rule 144A  security  continues  to be liquid.  It is not
possible  to  predict  with  assurance  exactly  how the  market  for Rule  144A
securities will further evolve.  This investment  practice could have the effect
of increasing the level of illiquidity in the Series,  if and to the extent that
qualified institutional buyers become for a time uninterested in purchasing Rule
144A securities.

     BORROWING.  The  Series  may  borrow  money  only  from  banks and only for
temporary  or  emergency  purposes  (but  not  for  the  purchase  of  portfolio
securities) in an amount not to exceed 15% of the value of its total assets. The
Series  will not  purchase  additional  portfolio  securities  if the Series has
outstanding borrowings in excess of 5% of the value of its total assets.

     LENDING OF PORTFOLIO  SECURITIES.  The Series may lend portfolio securities
to brokers or dealers, banks or other institutional borrowers of securities. The
borrower must maintain  with the Series cash or  equivalent  collateral  such as
Treasury  Bills,  equal to at least 100% of the market  value of the  securities
loaned.  During the time portfolio securities are on loan, the borrower pays the
Series any income  accruing on the loaned  securities  and the Series may invest
the cash  collateral  and earn  additional  income or may receive an agreed upon
amount of  interest  income  from the  borrower.  The Series may lend  portfolio
securities  to the  extent  that the  Manager  deems  appropriate  in seeking to
achieve the Series' investment objective.

     REPURCHASE AGREEMENTS. The Series may enter into repurchase agreements with
commercial banks and with  broker/dealers  to invest cash for the short-term.  A
repurchase  agreement  is an agreement  under which the Series  acquires a money
market instrument, generally a U.S. Government obligation qualified for purchase
by the Series,  subject to resale at an agreed upon price and date.  Such resale
price reflects an agreed upon interest rate effective for the period of time the
instrument  is held by the Series and is unrelated  to the interest  rate on the
instrument.  Repurchase  agreements  could involve certain risks in the event of
bankruptcy  or other  default  by the  seller,  including  possible  delays  and
expenses in  liquidating  the securities  underlying  the agreement,  decline in
value of the underlying  securities and loss of interest.  Repurchase agreements
usually are for short  periods,  such as one week or less, but may be for longer
periods.  As a matter of  fundamental  policy,  the  Series  will not enter into
repurchase  agreements of more than one week's  duration if more than 10% of its
total assets would be invested in such  agreements  and in restricted  and other
illiquid securities.

     WHEN-ISSUED SECURITIES. The Series may purchase securities on a when-issued
basis,  in which case  delivery and payment  normally  take place within 45 days
after the date of the  commitment to purchase.  The payment  obligation  and the
interest rate that will be received on the securities are each fixed at the time
the buyer enters into the  commitment.  Although the Series will only purchase a
security on a  when-issued  basis with the  intention of actually  acquiring the
securities,  the Series may sell these securities before the purchase settlement
date if it is deemed advisable.

     Securities  held by the Series and  securities  purchased on a  when-issued
basis are subject to changes in market value based upon  investors'  perceptions
of the creditworthiness of the issuer and upon changes, real or anticipated,  in
the level of interest rates. If the Series remains  substantially fully invested
at the same time that it has purchased  securities on a when-issued  basis,  the
market value of the Series'  assets may fluctuate  more than would  otherwise be
the case.  Purchasing a security on a when-issued  basis can involve a risk that
the yields  available in the market when the delivery  takes place may be higher
than those obtained on the security so purchased.

     An account  for the Series  consisting  of cash or liquid  high-grade  debt
securities  equal  to  the  amount  of  the  when-issued   commitments  will  be
established  with



                                       9
<PAGE>

the Series'  Custodian,  and marked to market  daily,  with  additional  cash or
liquid  high-grade debt securities added when necessary.  When the time comes to
pay for when-issued  securities,  the Series will meet its obligations from then
available cash flow,  sale of securities held in the separate  account,  sale of
other  securities  or,  although the Series would not normally  expect to do so,
from the sale of the when-issued  securities  themselves (which may have a value
greater or less than the Series'  payment  obligations).  Sale of  securities to
meet such obligations carries with it a greater potential for the realization of
capital gain or loss.

     GENERAL.   Except  as  noted  above  or  in  the  Statement  of  Additional
Information,  the  foregoing  investment  policies are not  fundamental  and the
Trustees of the Fund may change such policies  without the vote of a majority of
the  outstanding  voting  securities of the Series.  As a matter of policy,  the
Trustees will not change the Series'  investment  objective of producing maximum
current income without such a vote. Under the 1940 Act, a "vote of a majority of
the outstanding  voting  securities" of the Series means the affirmative vote of
the lesser of (1) more than 50% of the  outstanding  shares of the Series or (2)
67% or more of the shares of the Series  present at a  shareholders'  meeting if
more than 50% of the  outstanding  shares of the Series are  represented  at the
meeting in person or by proxy.

   
     YEAR 2000 RISKS.  The Series is dependent upon service  providers and their
computer systems for its day-to-day operations,  and many of the Series' service
providers in turn depend upon computer  systems of other persons.  Many computer
systems   currently   cannot  properly   recognize  or  process  date  sensitive
information  relating  to the  year  2000  and  beyond.  The  Manager,  Seligman
Financial  Services,  Inc., and the Series'  custodian have been  evaluating the
impact the year 2000 issue may have on their computer systems.  They expect that
any  modifications to their computer systems  necessary to address the year 2000
issue will be made and tested in a timely  manner.  They are also  working  with
vendors  and  other  persons  whose  systems  are  linked  to  theirs  to obtain
satisfactory  assurances  regarding  the year 2000 issue.  Seligman  Data Corp.,
which provides certain corporate and shareholder  account services to the Series
at cost,  has  informed  the Series that it does not expect that the cost to the
Series of its services will increase materially as a result of the modifications
to its computer  systems  necessary  to prepare for the year 2000.  The costs of
systems  remediation by persons other than Seligman Data Corp. will not be borne
directly by the Series.  There can be no  assurance  that the  remedial  actions
taken by the Series' service providers will be sufficient or timely.  Inadequate
remediation  could have an adverse effect on the Series'  operations,  including
pricing and securities trading and settlement,  and the provision of shareholder
services.
    

MANAGEMENT SERVICES

     The Trustees  provide broad  supervision over the affairs of the Series and
the Fund as a whole. Pursuant to a Management Agreement approved by the Trustees
and the  shareholders of the Series,  the Manager manages the investments of the
Series and administers the business and other affairs of the Series. The address
of the Manager is 100 Park Avenue, New York, NY 10017.

   
     The Manager also serves as manager of seventeen other investment  companies
which,  together with the Fund,  comprise the "Seligman  Group." These companies
are: Seligman Capital Fund, Inc.,  Seligman Cash Management Fund, Inc., Seligman
Common Stock Fund Inc.,  Seligman  Communications  and Information  Fund,  Inc.,
Seligman  Frontier Fund, Inc.,  Seligman Growth Fund, Inc.,  Seligman  Henderson
Global Fund Series,  Inc.,  Seligman Income Fund, Inc.,  Seligman Municipal Fund
Series,  Inc.,  Seligman  Municipal Series Trust,  Seligman New Jersey Municipal
Fund, Inc., Seligman  Pennsylvania  Municipal Fund Series,  Seligman Portfolios,
Inc.,  Seligman Quality  Municipal Fund,  Inc.,  Seligman Select Municipal Fund,
Inc.,  Seligman Value Fund Series,  Inc., and Tri-Continental  Corporation.  The
aggregate assets of the Seligman Group were approximately $20.2 billion at March
31,  1998.  The  Manager  also  provides  investment  management  or  advice  to
institutional  and other accounts having an aggregate value at March 31, 1998 of
approximately $7.4 billion.
    

     Mr.  William C. Morris is Chairman of the Manager and Chairman of the Board
and Chief  Executive  Officer

                                       10
<PAGE>

of the Fund. Mr. Morris owns a majority of the outstanding  voting securities of
the Manager.

     The  Manager  provides  senior   management  for  Seligman  Data  Corp.,  a
wholly-owned  subsidiary of certain investment  companies in the Seligman Group,
which  performs,  at  cost,  certain  recordkeeping  functions  for the  Series,
maintains the records of  shareholder  accounts and furnishes  dividend  paying,
redemption and related services.

   
     The Manager is entitled to receive a management fee,  calculated  daily and
payable  monthly.  The  management fee is equal to an annual rate of .65% of the
Series'  average daily net assets on the first $1 billion of net assets and .55%
of the Series'  average daily net assets in excess of $1 billion.  In 1997,  the
management  fee  paid by the Fund was  equal  to an  annual  rate of .62% of the
average daily net assets of the Series.

     The Fund pays all of its expenses  other than those assumed by the Manager.
The Fund's expenses are allocated among the series in a manner determined by the
Trustees to be fair and equitable.  Total expenses of the Series' Class A, Class
B and  Class D  shares,  respectively,  for the year  ended  December  31,  1997
amounted  to 1.14%,  1.90% and 1.90%,  respectively,  of the  average  daily net
assets of such class.

     PORTFOLIO MANAGEMENT.  Mr. Daniel J. Charleston, a Managing Director of the
Manager,  is a Vice President of the Fund and has been Portfolio  Manager of the
Series since January 1990.  Mr.  Charleston is also a Vice President of Seligman
Portfolios, Inc. and Portfolio Manager of its High-Yield Bond Portfolio.

     The Manager's discussion of the Series' performance as well as a line graph
illustrating comparative performance information between the Series, the Merrill
Lynch  High  Yield  Master  Index,  Lipper  High  Current  Yield and the  Lipper
High-Yield  Bond Fund Index is  included  in the Fund's  1997  Annual  Report to
Shareholders.  Copies of the 1997 Annual Report may be obtained, without charge,
by calling or writing the Series at the telephone  numbers or address  listed on
the cover page of this Prospectus.
    

     PORTFOLIO  TRANSACTIONS.  Corporate bonds and other fixed-income securities
are generally traded on the  over-the-counter  market on a "net" basis without a
stated  commission,  through  dealers  acting for their own  account  and not as
brokers.  The Series  will  engage in  transactions  with these  dealers or deal
directly  with the  issuer.  Prices  paid to dealers  will  generally  include a
"spread,"  i.e., the difference  between the prices at which a dealer is willing
to  purchase  or to sell the  security at that time.  The  Management  Agreement
recognizes  that in the purchase and sale of portfolio  securities,  the Manager
will seek the most  favorable  price and  execution  and,  consistent  with that
policy, may give  consideration to the research,  statistical and other services
furnished by dealers to the Manager for its use in connection  with its services
to the Fund as well as to other clients.

     Consistent  with  the  Rules  of the  National  Association  of  Securities
Dealers,  Inc.  and subject to seeking the most  favorable  price and  execution
available and such other policies as the Trustees of the Fund may determine, the
Manager  may  consider  sales of shares of the Series and,  if  permitted  under
applicable  laws,  may consider sales of shares of the other mutual funds in the
Seligman  Group as a factor in the  selection  of  brokers or dealers to execute
portfolio transactions for the Series.

   
     PORTFOLIO  TURNOVER.  A change in securities held by the Series is known as
"portfolio  turnover"  which may  result in the  payment by the Series of dealer
spreads or underwriting  commissions and other transactions costs on the sale of
securities as well as on the  reinvestment of the proceeds in other  securities.
Higher portfolio  turnover  involves greater  transactions  costs and a possible
increase in short-term capital gains or losses. Although it is the policy of the
Series to hold securities for investment, changes will be made from time to time
when the Manager  believes such changes will  strengthen the Series'  portfolio.
The portfolio turnover rate will vary from year to year as well as within a year
and is likely to exceed 100% and has done so in prior years.
    

PURCHASE OF SHARES

     Seligman Financial  Services,  Inc. ("SFSI"),  an affiliate of the Manager,
acts as general  distributor  of the  Series'  shares.  Its  address is 100 Park
Avenue, New York, NY 10017.


                                       11
<PAGE>

     The Fund  issues  three  classes  of  shares:  Class A  shares  are sold to
investors  choosing the initial sales load alternative;  Class B shares are sold
to investors  choosing to pay no initial sales load, a higher  distribution  fee
and a CDSL with  respect to  redemptions  within six years of  purchase  and who
desire shares to convert  automatically to Class A shares after eight years; and
Class D shares are sold to  investors  choosing no initial  sales load, a higher
distribution  fee and a CDSL on  redemptions  within one year of  purchase.  See
"Alternative Distribution System" above.

     Shares of the Series may be  purchased  through any  authorized  investment
dealer.  All  orders  will be  executed  at the net asset  value per share  next
determined  after  receipt of the  purchase  order plus,  in the case of Class A
shares, a sales load which, except for shares purchased under one of the reduced
sales  load  plans,  will  vary  with the size of the  purchase  as shown in the
schedule under "Class A shares -- Initial Sales Load" below.

     THE  MINIMUM  AMOUNT  FOR  INITIAL  INVESTMENT  IN THE  SERIES  IS  $1,000;
SUBSEQUENT  INVESTMENTS  MUST  BE IN THE  MINIMUM  AMOUNT  OF $100  (EXCEPT  FOR
INVESTMENT OF DIVIDENDS AND CAPITAL GAIN  DISTRIBUTIONS).  THE FUND RESERVES THE
RIGHT TO RETURN  INVESTMENTS  WHICH DO NOT MEET THESE  MINIMUMS.  EXCEPTIONS  TO
THESE MINIMUMS ARE AVAILABLE FOR ACCOUNTS BEING  ESTABLISHED  CONCURRENTLY  WITH
THE INVEST-A-CHECK(R)  SERVICE. THE MINIMUM AMOUNT FOR INITIAL INVESTMENT IN THE
SELIGMAN  TIME  HORIZON  MATRIXSM  ASSET  ALLOCATION  PROGRAM  IS  $10,000.  FOR
INFORMATION ABOUT THIS PROGRAM, CONTACT YOUR FINANCIAL ADVISOR.

   
     The  minimum  amount  for  initial  investment  in the  Series  is $500 for
investors  who purchase  shares of the Fund through  Merrill  Lynch's MFA or MFA
Select  Programs.  There is no minimum  investment  required for  investors  who
purchase shares of the Series through wrap fee programs.

     Purchase  orders  placed for Class B shares must be for an amount LESS THAN
$250,000.

     Orders received by an authorized  dealer by the close of regular trading on
the New York Stock  Exchange  ("NYSE")  (normally,  4:00 p.m.  Eastern time) and
accepted by SFSI before the close of business  (5:00 p.m.  Eastern  time) on the
same day will be executed at the  Series' net asset value  determined  as of the
close of regular  trading on the NYSE on that day plus, in the case of the Class
A shares,  any applicable sales load. Orders accepted by dealers after the close
of regular trading on the NYSE, or received by SFSI after the close of business,
will be executed at the Series' net asset value as next determined  plus, in the
case of Class A shares, any applicable sales load. The authorized dealer through
which the shareholder  purchases  shares is responsible for forwarding the order
to SFSI promptly.
    

     Payment  for  dealer  purchases  may be made by check  or by wire.  To wire
payment,  dealer  orders  must  first be placed  through  SFSI's  order desk and
assigned a purchase  confirmation  number.  Funds in payment of the purchase may
then be wired to Mellon Bank, N.A. ABA #043000261,  A/C Seligman High-Yield Bond
Series (A, B or D),  A/C#107-1011.  WIRE  TRANSFERS  MUST  INCLUDE THE  PURCHASE
CONFIRMATION NUMBER AND CLIENT ACCOUNT REGISTRATION AND ACCOUNT NUMBER.  Persons
other than dealers who wish to wire payment should  contact  Seligman Data Corp.
for  specific  wire  instructions.  Although  the Fund  makes no charge for this
service, the transmitting bank may impose a wire service fee.

   
     Current  shareholders may purchase  additional shares of the Series through
any  authorized  dealer or by sending a check payable to the "Seligman  Group of
Funds,"  in a  postage-paid  return  envelope  or  directly  to P.O.  BOX  9766,
PROVIDENCE, RI 02940-9766. The check should be accompanied by an investment slip
(provided  on the bottom of  shareholder  account  statements)  and  include the
shareholder's name, address, account number, Series name and class of shares (A,
B or D). Checks sent directly to Seligman Data Corp.  and received in good order
will be invested at the  Series' net asset value  determined  as of the close of
regular trading on the NYSE on that day plus, in the case of Class A shares, any
applicable sales load.
    

     IF A SHAREHOLDER DOES NOT PROVIDE THE REQUIRED  INFORMATION,  SELIGMAN DATA
CORP. WILL SEEK FURTHER



                                       12
<PAGE>

   
CLARIFICATION AND MAY BE FORCED TO RETURN THE CHECK TO THE SHAREHOLDER.  IF ONLY
THE CLASS DESIGNATION IS MISSING,  THE INVESTMENT WILL  AUTOMATICALLY BE MADE IN
CLASS A SHARES  FOR NEW  ACCOUNTS  OR IN THE  SHAREHOLDER'S  EXISTING  CLASS FOR
ADDITIONAL  PURCHASES.  Checks for investment must be in U.S. dollars drawn on a
domestic  bank.  Credit card  convenience  checks and third party checks  (i.e.,
checks made payable to someone other than the "Seligman Group of Funds") may not
be used to open a new fund account or purchase additional shares of the Series.

     Seligman Data Corp. may charge a $10.00 service fee for checks  returned to
it uncollectable.  This charge may be deducted from the  Shareholder's  account.
For the protection of the Fund and its shareholders, no redemption proceeds will
be remitted to a shareholder  with respect to shares  purchased by check (unless
certified) until Seligman Data Corp. receives notice that the check has cleared,
which may be up to 15 days from the  credit of the  shares to the  shareholder's
account.

     Current  shareholders may also purchase  additional  shares by having funds
electronically  transferred  directly  from an employer,  the  Internal  Revenue
Service or other government  agency, or any institution  capable of transmitting
payments through the Automated Clearing House ("ACH") network.  Purchases may be
one-time  transactions,  or, for those  institutions  that offer direct  deposit
programs,  may be made on a  systematic  basis.  To utilize  this  service,  the
following bank information must be provided to the paying institution:

                                Mellon Bank, N.A.

                                 ABA #043000261

                            A/C No. 600FFFNNNNNNNNNN

     "600"  IDENTIFIES  THE  SELIGMAN  GROUP OF  FUNDS,  "FFF" IS THE FUND  CODE
REPRESENTING  THE FUND AND CLASS OF SHARES IN WHICH THE PURCHASE  SHOULD BE MADE
(this code is available on the back of all shareholder account statements),  AND
"NNNNNNNNNN" INDICATES THE SHAREHOLDER'S  TEN-DIGIT ACCOUNT NUMBER. In addition,
the  shareholder  must indicate that this is a checking  account at Mellon Bank.
For  IRA  and  group  retirement  accounts,  all  electronic  purchases  will be
designated  as  current  year  contributions.  For more  information  about this
service, please contact Seligman Data Corp.

     VALUATION.  The net asset value of the Series'  shares is  determined  each
day,  Monday  through  Friday,  as of the close of  regular  trading on the NYSE
(normally,  4:00  p.m.  Eastern  time)  on each  day  that  the NYSE is open for
business.  Net asset value is calculated  separately for each class.  Securities
traded on a U.S. or foreign  exchange or  over-the-counter  market are valued at
the last sales price on the primary exchange or market on which they are traded.
United  Kingdom  securities  and  securities for which there are no recent sales
transactions are valued based on quotations provided by primary market makers in
such securities.  Short-term  holdings maturing in 60 days or less are generally
valued  at  amortized  cost if  their  original  maturity  was 60 days or  less.
Short-term  holdings with more than 60 days remaining to maturity will be valued
at current  market value until the 61st day prior to maturity,  and will then be
valued on an amortized  cost basis based on the value as of such date unless the
Trustees  determine  that  amortized  cost value does not represent  fair market
value.  Any  securities  for which  recent  market  quotations  are not  readily
available  are valued at fair value  determined in  accordance  with  procedures
approved by the Fund's Trustees.

     Although  the  legal  rights  of Class A,  Class B and  Class D shares  are
substantially  identical, the different expenses borne by each class will result
in different net asset values and dividends. The net asset values of Class B and
Class D shares  will  generally  be lower  than the net  asset  value of Class A
shares as a result of the higher  distribution fees charged to Class B and Class
D shares.  In addition,  net asset value per shares of the three classes will be
affected to the extent any other expenses differ among classes.

     CLASS A  SHARES--INITIAL  SALES  LOAD.  Class A shares  are  subject  to an
initial  sales load which  varies with the size of the  purchase as shown in the
schedule below, and an annual service fee of up to .25% of the average daily net
asset value of Class A shares.  See  "Administration,  Shareholder  Services and
Distribution Plan."
    


                                       13
<PAGE>

- ------------------------------------------------------------------

                       CLASS A SHARES--SALES LOAD SCHEDULE
                                  SALES LOAD
                              AS A PERCENTAGE OF         REGULAR
                            ----------------------       DEALER
                                       NET AMOUNT       DISCOUNT
                             OFFERING   INVESTED    (NET AS A % OF
     AMOUNT OF PURCHASE       PRICE    ASSET VALUE)  OFFERING PRICE
     ------------------     ---------------------------------------
     Less than  $ 50,000.....  4.75%      4.99%          4.25%
      50,000--   99,999.....   4.00        4.17            3.50
     100,000--  249,999.....   3.50        3.63            3.00
     250,000--  499,999.....   2.50        2.56            2.25
     500,000--  999,999.....   2.00        2.04            1.75
   1,000,000-- or more*.....      0           0               0

  -------
  *Shares  acquired at net asset value  pursuant to the above  Schedule  will be
   subject  to a CDSL of 1% if  redeemed  within  18  months  of  purchase.  See
   "Purchase of Shares--Contingent Deferred Sales Load."
- ------------------------------------------------------------------

     There is no initial sales load on purchases of Class A shares of $1,000,000
or more ("NAV  sales");  however,  such  shares  are  subject to a CDSL of 1% if
redeemed within eighteen months of purchase.

     SFSI shall pay broker/dealers,  from its own resources, a fee on NAV sales,
calculated  as follows:  1.00% of NAV sales up to but not  including $2 million;
 .80% of NAV sales from $2 million up to but not  including  $3 million;  .50% of
NAV sales from $3 million up to but not  including  $5 million;  and .25% of NAV
sales from $5 million  and above.  The  calculation  of the fee will be based on
assets held by a "single person" as defined below.

     SFSI shall also pay broker/dealers, from its own resources, a fee on assets
of  certain  investments  in  Class  A  shares  of  the  Seligman  Mutual  Funds
participating  in an "eligible  employee  benefit  plan" (as defined below under
"Special Programs") that are attributable to the particular  broker/dealer.  The
shares  eligible  for the fee are those on which an  initial  sales load was not
paid because  either the  participating  eligible  employee  benefit plan has at
least (i)  $500,000  invested in the  Seligman  Mutual Funds or (ii) 50 eligible
employees to whom such plan is made available.  Class A shares representing only
an initial  purchase of Seligman Cash  Management  Fund are not eligible for the
fee.  Such shares will become  eligible for the fee once they are  exchanged for
shares of another Seligman Mutual Fund. The payment is based on cumulative sales
for each Plan during a single  calendar  year, or portion  thereof.  The payment
schedule,  for each calendar  year, is as follows:  1.00% of sales up to but not
including $2 million;  .80% of sales from $2 million up to but not  including $3
million;  .50% of sales from $3 million up to but not including $5 million;  and
 .25% of sales from $5 million and above.

     REDUCED SALES LOADS.  Reductions in sales loads apply to purchases of Class
A shares by a "single person," including an individual, members of a family unit
comprising husband, wife, and minor children purchasing securities for their own
account,  or a trustee  or other  fiduciary  purchasing  for a single  fiduciary
account or single trust.  Purchases  made by a trustee or other  fiduciary for a
fiduciary  account may not be aggregated  with  purchases  made on behalf of any
other fiduciary or individual account.

     Shares purchased without an initial sales load in accordance with the sales
load schedule or pursuant to a Volume Discount,  Right of Accumulation or Letter
of Intent are subject to a CDSL of 1% on redemptions  within  eighteen months of
purchase.

     o VOLUME DISCOUNTS are provided if the total amount being invested in Class
A shares of the Series alone,  or in any  combination  of shares of the Seligman
Mutual Funds that are sold with an initial sales load,  reaches levels indicated
in the above sales load schedule.

   
     o THE RIGHT OF ACCUMULATION  allows an investor to combine the amount being
invested in shares of any Seligman  Mutual Fund sold with an initial  sales load
with the total net asset  value of shares  already  owned that were sold with an
initial sales load,  including shares of Seligman Cash Management Fund that were
acquired  by the  investor  through an  exchange  of shares of another  Seligman
Mutual Fund on which there was an initial sales load, to determine reduced sales
loads in  accordance  with the sales  load  schedule.  An  investor  or a dealer
purchasing  shares on behalf of an investor  must indicate that the investor has
existing accounts when making investments or opening new accounts.
    

     o LETTER OF INTENT  allows an investor  to  purchase  Class A shares of the
Series over a 13-month period at reduced initial sales loads, based on the total
amount the  investor  intends to purchase  plus the total net asset 



                                       14
<PAGE>

   
value of the other  Seligman  Mutual Funds  already owned that were sold with an
initial  sales  load and the total net asset  value of shares of  Seligman  Cash
Management  Fund that were  acquired  through an  exchange  of shares of another
Seligman  Mutual Fund on which there was an initial sales load. An investor or a
dealer purchasing Class A shares on behalf of an investor must indicate that the
investor has existing accounts when making  investments or opening new accounts.
For more  information  concerning  terms of Letters  of  Intent,  see "Terms and
Conditions."
    

     SPECIAL PROGRAMS.  The Series may sell Class A shares at net asset value to
present and retired directors,  trustees,  officers, employees and their spouses
(and  family  members  of the  foregoing)  of the  Fund,  the  other  investment
companies in the Seligman Group, the Manager and other companies affiliated with
the Manager. Family members are defined to include lineal descendants and lineal
ancestors,  siblings  (and  their  spouses  and  children)  and any  company  or
organization controlled by any of the foregoing.  Such sales also may be made to
employee  benefit  and  thrift  plans  for such  persons  and to any  investment
advisory,  custodial, trust or other fiduciary account managed or advised by the
Manager or any affiliate.

   
     Class A  shares  also  may be  issued  without  an  initial  sales  load in
connection with the acquisition of cash and securities owned by other investment
companies;  to any  registered  unit  investment  trust  which is the  issuer of
periodic  payment plan  certificates,  the net proceeds of which are invested in
Series shares; to separate  accounts  established and maintained by an insurance
company which are exempt from  registration  under Section  3(c)(11) of the 1940
Act; to registered  representatives  and employees  (and their spouses and minor
children)  of any dealer  that has a sales  agreement  with SFSI;  to  financial
institution trust  departments;  to registered  investment  advisers  exercising
discretionary  investment  authority  with  respect to the  purchase  of Series'
shares;  to accounts of financial  institutions  or  broker/dealers  that charge
account  management  fees,  provided  the Manager or one of its  affiliates  has
entered into an agreement with respect to such  accounts;  pursuant to sponsored
arrangements with  organizations  which make  recommendations to or permit group
solicitations of, its employees,  members or participants in connection with the
purchase of shares of the Series; to other investment  companies in the Seligman
Group in connection with a deferred fee arrangement for outside  directors;  and
to "eligible  employee benefit plans" which have at least (i) $500,000  invested
in the Seligman Mutual Funds or (ii) 50 eligible  employees to whom such plan is
made available.  "Eligible employee benefit plan" means any plan or arrangement,
whether or not tax qualified,  which provides for the purchase of Series shares.
Sales  of  shares  to such  plans  must be made  in  connection  with a  payroll
deduction  system of plan funding or other system  acceptable  to Seligman  Data
Corp.

     Section 403(b) plans sponsored by public  educational  institutions are not
eligible for net asset value purchases based on the aggregate investment made by
the plan or number of eligible  employees.  Employee  benefit plans eligible for
net asset value sales, as described  above,  will be subject to a CDSL of 1% for
terminations at the plan level only, on redemptions of shares  purchased  within
eighteen  months  of plan  termination.  Sales  pursuant  to a  401(k)  or other
retirement  alliance  program  the sponsor of which has an  agreement  with SFSI
pursuant to which  shares are made  available at net asset value are not subject
to a CDSL.
    

     CLASS B SHARES.  Class B shares are sold without an initial  sales load but
are subject to a CDSL if the shares are redeemed within six years of purchase at
rates set forth in the table below,  charged as a percentage  of the current net
asset value or the original purchase price, whichever is less.

YEARS SINCE PURCHASE                                  CDSL
- --------------------                                  ----
less than 1 year...................................     5%
1 year or more but less than 2 years...............     4%
2 years or more but less than 3 years..............     3%
3 years or more but less than 4 years..............     3%
4 years or more but less than 5 years..............     2%
5 years or more but less than 6 years..............     1%
6 years or more....................................     0%

     Class B shares are also subject to an annual  distribution  fee of .75% and
an annual  service fee of up to .25% of the average daily net asset value of the
Class B shares.  SFSI will make a 4% payment to dealers in



                                       15
<PAGE>

   
respect  of  purchases  of  Class B  shares.  Approximately  eight  years  after
purchase, Class B shares will convert automatically to Class A shares, which are
subject  to an  annual  service  fee of .25%  but no  distribution  fee.  Shares
purchased  through  reinvestment of dividends and capital gain  distributions on
Class B shares also will convert  automatically to Class A shares along with the
underlying shares on which they were earned. Conversion occurs at the end of the
month which  precedes the eighth  anniversary  of the purchase  date. If Class B
shares of the Series are exchanged for Class B shares of another Seligman Mutual
Fund, the  conversion  period  applicable to the Class B shares  acquired in the
exchange  will apply,  and the holding  period of the shares  exchanged  will be
tacked onto the holding period of the shares  acquired.  Class B shareholders of
the Series exercising the exchange  privilege will continue to be subject to the
Series'  CDSL  schedule  if such  schedule  is higher  or  longer  than the CDSL
schedule relating to the new Class B shares. In addition,  Class B shares of the
Series acquired by exchange will be subject to the Series' CDSL schedule if such
schedule is higher or longer  than the CDSL  schedule  relating to the  original
Class B shares.

     CLASS D SHARES.  Class D shares are sold without an initial  sales load but
are subject to a 1% CDSL if the shares are redeemed  within one year,  an annual
distribution  fee of up to .75% and an annual  service fee of up to .25%, of the
average daily net asset value of the Class D shares. SFSI will make a 1% payment
to dealers in respect of  purchases  of Class D shares.  Unlike  Class B shares,
Class D shares do not automatically convert to Class A shares after eight years.

     CONTINGENT  DEFERRED  SALES LOAD. A CDSL will be imposed on  redemptions of
Class B or Class D shares which were  purchased  during the  preceding six years
(for Class B shares) or twelve  months  (for Class D shares);  however,  no CDSL
will be imposed on shares  acquired  through  the  investment  of  dividends  or
distributions  from any  Class B or Class D shares of mutual  funds  within  the
Seligman Group.  The amount of any CDSL will initially be used by SFSI to defray
the  expense of the  payment of 4% (in the case of Class B shares) or 1% (in the
case of Class D Shares) made by it to Service  Organizations  (as defined  under
"Administration,  Shareholder  Services and  Distribution  Plan") at the time of
sale.  Pursuant to an agreement with FEP Capital,  L.P. ("FEP") to fund payments
in respect of Class B shares, SFSI has agreed to assign any Class B CDSL to FEP.

     A CDSL  of 1%  will  also be  imposed  on  redemptions  of  Class A  shares
purchased  during the preceding  eighteen months if such shares were acquired at
net asset value  pursuant to the sales load  schedule  provided  under  "Class A
Shares--Initial Sales Load." Employee benefit plans eligible for net asset sales
as described  above under "Special  Programs" may be subject to a CDSL of 1% for
terminations  at the plan level only, or redemption of shares  purchased  within
eighteen months prior to plan termination.

     The 1% CDSL  normally  imposed on  redemptions  of  certain  Class A shares
(i.e.,  those purchased during the preceding  eighteen months at net asset value
pursuant to the sales load  schedule  provided  under  "Class A  Shares--Initial
Sales Load") will be waived on shares that were purchased through Morgan Stanley
Dean Witter & Co. ("Morgan Stanley") by certain Chilean institutional  investors
(i.e., pension plans,  insurance companies and mutual funds). Upon redemption of
such shares within an eighteen month period,  Morgan Stanley will reimburse SFSI
a pro rata portion of the fee it received  from SFSI at the time of sale of such
shares.

     To minimize the  application  of a CDSL to a  redemption,  shares  acquired
pursuant to the  investment of dividends and capital gain  distributions  (which
are not subject to a CDSL) will be redeemed first; followed by shares held for a
period of time  longer  than the  applicable  CDSL  period.  Shares held for the
longest  period of time  within the  applicable  period  will then be  redeemed.
Additionally, for those shares determined to be subject to a CDSL, the CDSL will
be assessed on the current net asset value or original purchase price, whichever
is less. No CDSL will be imposed on shares  acquired  through the  investment of
dividends  or capital  gain  distributions  from any Class A, Class B or Class D
shares of Seligman Mutual Funds.
    

     For example,  assume an investor purchased 100 Class D shares in January at
a price of $10.00 per share.  During the first year, 5 additional Class D shares
were 



                                       16
<PAGE>

acquired through  investment of dividends and  distributions.  In January of the
following  year, an  additional  50 Class D shares were  purchased at a price of
$12.00  per  share.  In March of that  year,  the  investor  chooses  to  redeem
$1,500.00 from the account which now holds 155 Class D shares with a total value
of  $1,898.75  ($12.25  per  share).  The  CDSL for  this  transaction  would be
calculated as follows:
   
Total shares to be redeemed
   (122.449 @ $12.25) as follows: ..........  $1,500.00
                                              =========
Dividend/Distribution shares
  (5 @ $12.25) .............................    $ 61.25
Shares held more than 1 year
  (100 @  $12.25) ..........................   1,225.00
Shares held less than 1 year subject to
  CDSL (17.449 @ $12.25) ...................     213.75
                                               --------
  Gross proceeds of redemption .............  $1,500.00
  Less CDSL (17.449 shares @
    $12.00 = $209.39 x 1% = $2.09) .........      (2.09)
                                               --------
Net proceeds of redemption .................  $1,497.91
                                              =========
    
     For  federal  income tax  purposes,  the amount of the CDSL will reduce the
gain or increase the loss,  as the case may be, on the amount  recognized on the
redemption of shares.

     The CDSL will be waived or reduced in the following instances:

   
     (a) on redemptions following the death or disability (as defined in section
72(m)(7) of the  Internal  Revenue Code of 1986,  as amended (the  "Code")) of a
shareholder or beneficial owner; (b) in connection with (i)  distributions  from
retirement  plans  qualified  under  section  401  (a) of  the  Code  when  such
redemptions  are  necessary to make  distributions  to plan  participants  (such
payments  include,  but are not  limited to death,  disability,  retirement,  or
separation  of  service),  (ii)  distributions  from a custodial  account  under
section 403(b)(7) of the Code or an individual retirement account (an "IRA") due
to death, disability,  minimum distribution requirements after attainment of age
701/2, or, for accounts established prior to January 1, 1998,  attainment of age
591/2,  and (iii) a tax-free return of an excess  contribution to an IRA; (c) in
whole or in part, in connection with shares sold to current and retired Trustees
of the Fund;  (d) in whole or in part,  in  connection  with  shares sold to any
state, county, or city or any instrumentality,  department, authority, or agency
thereof,  which is prohibited by applicable  investment laws from paying a sales
load or commission in connection  with the purchase of shares of any  registered
investment  management  company;  (e) in whole or in part,  in  connection  with
systematic  withdrawals;  (f) in connection  with  participation  in the Merrill
Lynch Small Market 401(k) Program;  and (g) in connection with the redemption of
shares of the Series if the Series is  combined  with  another  Seligman  Mutual
Fund, or another similar reorganization transaction.
    
     If, with respect to a redemption  of any Class A, Class B or Class D shares
sold by a dealer,  the CDSL is waived  because the  redemption  qualifies  for a
waiver as set forth above,  the dealer shall remit to SFSI promptly upon notice,
an amount  equal to the payment or a portion of the payment  made by SFSI at the
time of sale of such shares.
       

   
     SFSI may from time to time assist dealers by, among other things, providing
sales  literature  to, and holding  informational  programs  for the benefit of,
dealers'  registered  representatives.  Dealers may limit the  participation  of
registered  representatives  in such  informational  programs  by means of sales
incentive  programs  which may  require  the sale of minimum  dollar  amounts of
shares of the Seligman  Mutual Funds.  SFSI may from time to time pay a bonus or
other  incentive to dealers that sell shares of the Seligman  Mutual  Funds.  In
some  instances,  these  bonuses or  incentives  may be offered  only to certain
dealers  which  employ  registered  representatives  who have sold or may sell a
significant  amount of shares of the Series  and/or  certain  other mutual funds
managed by the Manager  during a specified  period of time.  Such bonus or other
incentive may take the form of payment for travel expenses,  including  lodging,
incurred in connection with trips taken by qualifying registered representatives
and members of their families to places within



                                       17
<PAGE>

or outside the United States.  The cost to SFSI of such  promotional  activities
and payments shall be consistent  with the Rules of the National  Association of
Securities Dealers, Inc., as then in effect.
    

TELEPHONE TRANSACTIONS

   
     A shareholder with telephone transaction privileges,  AND THE SHAREHOLDER'S
BROKER/DEALER   REPRESENTATIVE,   has  the  ability  to  effect  the   following
transactions  via telephone:  (i) redemption of Series shares with proceeds sent
to the address of record (up to $50,000 per day per fund account), (ii) exchange
of Series shares for shares of the same class of another  Seligman  Mutual Fund,
(iii) change of a dividend  and/or capital gain  distribution  option,  and (iv)
change of address.  In addition,  a shareholder who has current bank information
on file with  Seligman  Data Corp.  may redeem shares via telephone and have the
proceeds  transferred  electronically from the shareholder's fund account to the
shareholder's  predesignated  bank  account.  See  "Redemption  of Shares."  All
telephone  transactions  are  effected  through  Seligman  Data  Corp.  at (800)
221-2450.

     FOR INVESTORS WHO PURCHASE  SHARES BY COMPLETING  AND SUBMITTING AN ACCOUNT
APPLICATION:  Unless an election is made otherwise on the Account Application, a
shareholder and the shareholder's  broker/dealer of record, as designated on the
Account   Application,   will  automatically   receive  telephone  services.   A
shareholder  must  provide  bank  information  on the Account  Application  or a
supplemental  election form in order to have  redemptions  via telephone sent to
the shareholder's bank account.

     FOR  INVESTORS  WHO  PURCHASE  SHARES  THROUGH A  BROKER/DEALER:  Telephone
services for a shareholder and the shareholder's  representative  may be elected
by completing a supplemental  election form available from the  broker/dealer of
record.
    

     FOR  ACCOUNTS  REGISTERED  AS IRAS:  Telephone  services  will include only
exchanges or address changes.
 
   
     FOR CORPORATIONS OR GROUP RETIREMENT PLANS:  Telephone  redemptions are not
permitted.  Additionally,  group  retirement plans are not permitted to change a
dividend or gain distribution option. Group retirement plans that may allow plan
participants  to place  telephone  exchanges  directly with the Fund, must first
provide a letter of authorization signed by the plan's custodian or trustee, and
provide a telephone services election form signed by each plan participant.
    

     All  Seligman  Mutual Fund  accounts  with the same account  number  (i.e.,
registered  exactly the same) as an existing account,  including any new fund in
which  the  shareholder  invests  in  the  future,  will  automatically  include
telephone  services if the existing  account has telephone  services.  Telephone
services may also be elected at any time on a  supplemental  telephone  services
election form.

     For accounts registered jointly (such as joint tenancies, tenants in common
and community  property  registrations),  each owner, by accepting or requesting
telephone  services,  authorizes  each of the other  owners to effect  telephone
transactions on his or her behalf.

     During times of drastic  economic or market  changes,  a shareholder or the
shareholder's  representative may experience  difficulty in contacting  Seligman
Data Corp. to request a redemption  or exchange of Series shares via  telephone.
In these  circumstances,  the  shareholder or the  shareholder's  representative
should consider using other redemption or exchange procedures.  (See "Redemption
of Shares"  below.) Use of these other  redemption  or exchange  procedures  may
result in the  request  being  processed  at a later  time  than if a  telephone
transaction had been used, and the Series' net asset value may fluctuate  during
such periods.

     The Fund and  Seligman  Data Corp.  will employ  reasonable  procedures  to
confirm that  instructions  communicated  by telephone  are genuine.  These will
include:  recording all telephone calls requesting  account activity,  requiring
that the caller provide certain requested personal and/or account information at
the time of the call for the purpose of establishing the caller's identity,  and
sending a written  confirmation of redemptions,  exchanges or address changes to
the address of record each time activity is initiated by  telephone.  As long as
the Fund and Seligman Data Corp. follow  instructions



                                       18
<PAGE>

communicated  by telephone  that were  reasonably  believed to be genuine at the
time of their receipt,  neither they nor any of their  affiliates will be liable
for any loss to the shareholder  caused by an unauthorized  transaction.  In any
instance where the Fund or Seligman Data Corp. is not reasonably  satisfied that
instructions  received by telephone are genuine, the requested  transaction will
not be executed, and neither they nor any of their affiliates will be liable for
any losses which may occur due to a delay in implementing  the  transaction.  If
the Fund or Seligman Data Corp. does not follow the procedures  described above,
the Fund or Seligman Data Corp. may be liable for any losses due to unauthorized
or fraudulent  instructions.  Telephone  transactions must be effected through a
representative  of Seligman Data Corp.,  i.e.,  requests may not be communicated
via Seligman Data Corp.'s automated telephone answering system. Shareholders, of
course,  may refuse or cancel  telephone  services.  Telephone  services  may be
terminated by a shareholder at any time by sending a written request to Seligman
Data  Corp.  TELEPHONE  SERVICES  MAY  NOT  BE  ESTABLISHED  BY A  SHAREHOLDER'S
BROKER/DEALER  WITHOUT THE WRITTEN  AUTHORIZATION  OF THE  SHAREHOLDER.  Written
acknowledgment  of the addition of telephone  services to an existing account or
termination of telephone services will be sent to the shareholder at the address
of record.

REDEMPTION OF SHARES

   
     A shareholder may redeem shares held in book credit ("uncertificated") form
without charge,  except a CDSL, if applicable,  at any time by SENDING A WRITTEN
REQUEST to Seligman Data Corp., P.O. Box 9759, Providence,  RI 02940-9759; or if
request is being sent by  overnight  delivery  service to 100 Park  Avenue,  New
York, NY 10017.  The  redemption  request must be signed by all persons in whose
name the shares are registered.  A shareholder may redeem shares that are not in
book credit form without charge,  except a CDSL, if applicable,  by surrendering
certificates in proper form to the same address.  Certificates should be sent by
certified or registered  mail.  Return receipt is advisable;  however,  this may
increase  mailing  time.  Share  certificates  must be endorsed  for transfer or
accompanied  by an endorsed  stock power signed by all share  owners  exactly as
their name(s) appear(s) on the account registration. The shareholder's letter of
instruction  or  endorsed  stock power  should  specify the Series or Fund name,
account  number,  class of shares (A, B or D) and the number of shares or dollar
amount to be redeemed.  The Fund cannot accept conditional  redemption  requests
(i.e., requests to sell shares at a specific price or on a future date).

     If the  redemption  proceeds  are (i)  $50,000 or more,  (ii) to be paid to
someone other than the shareholder of record (regardless of the amount) or (iii)
to be mailed to other than the address of record (regardless of the amount), the
signature(s) of the  shareholder(s)  must be guaranteed by an eligible financial
institution  including,  but  not  limited  to,  the  following:   banks,  trust
companies,  credit  unions,  securities  brokers and  dealers,  savings and loan
associations and participants in the Securities Transfer  Association  Medallion
Program (STAMP),  the Stock Exchanges  Medallion Program (SEMP) and the New York
Stock Exchange Medallion Signature Program (MSP). The Fund reserves the right to
reject a signature  guarantee  where it is believed that the Fund will be placed
at risk by accepting such guarantee.  A signature guarantee is also necessary in
order to change the account registration. Notarization by a notary public is not
an  acceptable  signature  guarantee.  A signature  guarantee is not required if
redemption   proceeds  are  transferred   electronically  to  the  shareholder's
predesignated bank account.
    

     ADDITIONAL DOCUMENTATION MAY ALSO BE REQUIRED BY SELIGMAN DATA CORP. IN THE
EVENT  OF A  REDEMPTION  BY A  CORPORATION,  EXECUTOR,  ADMINISTRATOR,  TRUSTEE,
CUSTODIAN OR RETIREMENT PLAN. FOR FURTHER INFORMATION WITH RESPECT TO REDEMPTION
REQUIREMENTS,  PLEASE CONTACT THE  SHAREHOLDER  SERVICES  DEPARTMENT OF SELIGMAN
DATA CORP. FOR ASSISTANCE.

     In the case of Class A shares,  (except  for  shares  purchased  without an
initial sales load due to the size of the purchase),  and in the case of Class B
shares  redeemed  after six years and Class D shares  redeemed after one year, a
shareholder  will  receive the net asset value per share next  determined  after
receipt  of a request in good  order.  If Class A shares  which  were  purchased
without an initial sales load because the pur-



                                       19
<PAGE>

chase amount was  $1,000,000  or more are  redeemed  within  eighteen  months of
purchase,  a  shareholder  will  receive  the net asset  value  per  share  next
determined  after  receipt  of a  request  in good  order,  less a CDSL of 1% as
described under "Purchase of Shares--Class A Shares--InitiaL  Sales Load" above.
If Class B shares are redeemed within six years of purchase,  a shareholder will
receive the net asset value per share next determined after receipt of a request
in good  order,  less  the  applicable  CDSL as  described  under  "Purchase  of
Shares--Class B Shares" above. If Class D shares are redeemed within one year of
purchase,  a  shareholder  will  receive  the net asset  value  per  share  next
determined  after  receipt  of a  request  in good  order,  less a CDSL of 1% as
described under "Purchase of Shares--Class D Shares" above.

   
     A  shareholder  also may "sell"  shares to the Fund  through an  investment
dealer and, in that way, be certain, providing the order is timely, of receiving
the net asset  value  established  at the end of the day on which the  dealer is
given the repurchase order (less any applicable  CDSL). The Fund makes no charge
for this  transaction,  but the  dealer  may  charge a  service  fee.  "Sell" or
repurchase orders received from an authorized dealer before the close of regular
trading on the NYSE (normally, 4:00 p.m. Eastern time) and received by SFSI, the
repurchase agent,  before the close of business on the same day will be executed
at the net asset value per share  determined as of the close of the NYSE on that
day, less any  applicable  CDSL.  Repurchase  orders  received  from  authorized
dealers  after the close of the NYSE or not  received by SFSI prior to the close
of business,  will be executed at the net asset value determined as of the close
of the NYSE on the next trading day, less any applicable CDSL.  Shares held in a
"street name" account with a broker/dealer  may be sold to the Fund only through
a broker/dealer.

     TELEPHONE  REDEMPTIONS.  Telephone redemptions of uncertificated shares may
be made once per day, in an amount of up to $50,000 per fund  account.  Proceeds
will be sent to the address of record.  A shareholder  whose bank is a member of
the ACH network and who has current bank  information on file with Seligman Data
Corp.  may  have  redemption   proceeds   transferred   electronically   to  the
shareholder's predesignated bank account. Telephone redemption requests received
by Seligman Data Corp. at (800) 221-2450 by the close of regular  trading on the
NYSE  (normally,  4:00 p.m.  Eastern  time) will be  processed at the Fund's net
asset  value  determined  as of the close of  business  on that day.  Redemption
requests by telephone  will not be accepted  within 30 days following an address
change. IRAs, group retirement plans, corporations and trusts for which the name
of the  current  trustee  does not appear in the  account  registration  are not
eligible for  telephone  redemptions.  The Fund reserves the right to suspend or
terminate its telephone redemption service at any time without notice.
    

     For more  information  about telephone  redemptions  and the  circumstances
under which shareholders may bear the risk of loss for a fraudulent transaction,
see "Telephone Transactions" above.

     CHECK REDEMPTION SERVICE. The Check Redemption Service allows a shareholder
who owns or  purchases  shares in the  Series  worth  $25,000 or more to request
Seligman  Data  Corp.  to  provide   redemption   checks  to  be  drawn  on  the
shareholder's  account in amounts of $500 or more. The  shareholder may elect to
use this  service on the  Account  Application  or by later  written  request to
Seligman Data Corp.  Shares for which  certificates have been issued will not be
available for redemption  under this Service.  Holders of Class B shares may use
this service  although check  redemptions of Class B shares will be subject to a
CDSL. Holders of Class D shares may use this service with respect to shares that
have been held for at least one year.  Dividends  continue to be earned  through
the date preceding the date the check clears for payment. Use of this service is
subject to Boston Safe  Deposit  and Trust Co.  rules and  regulations  covering
checking accounts.  Separate checkbooks will be furnished for each series of the
Fund.

     There is no  charge  for use of  checks.  When  honoring  a check  that was
processed  for payment,  Boston Safe Deposit and Trust Co. will cause the Series
to redeem exactly enough full and fractional shares from an account to cover the
amount of the check.  If shares are 



                                       20
<PAGE>

owned jointly, redemption checks must be signed by all persons, unless otherwise
elected on the Account  Application,  in which case a single  signature  will be
acceptable.

     In view of daily  fluctuations in share value,  the  shareholder  should be
certain  that the  amount of shares in the  account is  sufficient  to cover the
amount of checks written. If insufficient  shares are in the account,  the check
will be returned,  marked "insufficient  funds." THE FUND WILL NOT REDEEM SHARES
IN ONE SERIES TO COVER A CHECK  WRITTEN ON ANOTHER  SERIES.  SELIGMAN DATA CORP.
WILL CHARGE A $10.00  PROCESSING FEE FOR ANY CHECK  REDEMPTION DRAFT RETURNED AS
UNCOLLECTABLE. THIS CHARGE MAY BE DEDUCTED FROM THE SHAREHOLDER'S ACCOUNT.

     Check Redemption books cannot be reordered unless the shareholder's account
has  a  value  of  $25,000  or  more  and  the  Fund  has a  certified  Taxpayer
Identification Number on file.
   
     Cancelled  checks will be returned to the shareholder  under separate cover
the month after they clear.  The Check  Redemption  Service may be terminated at
any time by the Fund or  Boston  Safe  Deposit  and  Trust Co.  See  "Terms  and
Conditions."

     GENERAL.  With respect to shares redeemed,  a check for the proceeds,  less
any applicable CDSL, will be sent to the address of record within seven calendar
days after acceptance of the redemption order and will be made payable to all of
the registered owners on the account.  With respect to shares repurchased by the
Fund,  a check for the proceeds  will be sent to the  investment  dealer  within
seven calendar days after  acceptance of the  repurchase  order and will be made
payable to the investment dealer. Redemptions via telephone to the shareholder's
bank account  will be  transferred  electronically  within five  business  days.
Payment  of  redemption  proceeds  will be  delayed  on  redemptions  of  shares
purchased by check (unless certified) until Seligman Data Corp.  receives notice
that the check has  cleared,  which may be up to 15 days from the  credit of the
shares to the  shareholder's  account.  No interest is earned on the  redemption
proceeds  during this period.  The proceeds of a redemption or repurchase may be
more or less than the shareholder's cost.
    

     The Fund reserves the right to redeem  shares owned by a shareholder  whose
investment in the Series has a value of less than a minimum amount  specified by
the Fund's  Trustees,  which is  presently  $500.  Shareholders  would be sent a
notice  before  the  redemption  is  processed  stating  that the value of their
investment in the Series is less than the  specified  minimum and that they have
sixty days to make an additional investment.

     REINSTATEMENT  PRIVILEGE.  If a shareholder redeems Class A shares and then
decides to reinvest  them, or to shift the investment to the other series of the
Fund or one of the other Seligman Mutual Funds the  shareholder  may, within 120
calendar days of the date of redemption,  use all or any part of the proceeds of
the  redemption to reinstate,  free of an initial sales load, all or any part of
the  investment  in shares of the Series or in shares of the other series of the
Fund or one of the other Seligman Mutual Funds. If a shareholder redeems Class B
or Class D shares and the redemption was subject to a CDSL, the  shareholder may
reinstate  all or any part of the  investment in shares of the same class of the
Series or of any of the other Seligman  Mutual Funds within 120 calendar days of
the date of redemption and receive a credit for the applicable  CDSL paid.  Such
investment will be reinstated at the net asset value per share established as of
the close of the NYSE on the day the request is  received.  Seligman  Data Corp.
must be informed that the purchase is a reinstated investment. REINSTATED SHARES
MUST BE  REGISTERED  EXACTLY AS THE SHARES  PREVIOUSLY  REDEEMED  AND THE FUND'S
MINIMUM INITIAL INVESTMENT AMOUNT MUST BE MET AT THE TIME OF REINSTATEMENT.

     Generally,  exercise  of the  Reinstatement  Privilege  does not  alter the
Federal  income  tax status of any  capital  gain  realized  on a sale of Series
shares,  but to the extent  that any shares are sold at a loss and the  proceeds
are reinvested in shares of the same Series, some or all of the loss will not be
allowed  as  a  deduction,   depending  upon  the  percentage  of  the  proceeds
reinvested.

                                       21
<PAGE>

ADMINISTRATION, SHAREHOLDER SERVICES
AND DISTRIBUTION PLAN

     Under the Series'  Administration,  Shareholder  Services and  Distribution
Plan (the  "Plan")  the  Series may pay to SFSI an  administration,  shareholder
services  and  distribution  fee in respect of the Series'  Class A, Class B and
Class D shares. Payments under the Plan may include, but are not limited to: (i)
compensation   to   securities   dealers  and  other   organizations   ("Service
Organizations")  for providing  distribution  assistance  with respect to assets
invested in the Series, (ii) compensation to Service Organizations for providing
administration, accounting and other shareholder services with respect to Series
shareholders,  and (iii)  otherwise  promoting the sale of shares of the Series,
including paying for the preparation of advertising and sales literature and the
printing and  distribution  of such  promotional  materials and  prospectuses to
prospective investors and defraying SFSI's costs incurred in connection with its
marketing efforts with respect to shares of the Series. The Manager, in its sole
discretion, may also make similar payments to SFSI from its own resources, which
may include the management fee that the Manager receives from the Series.

     Under the Plan, the Series reimburses SFSI for its expenses with respect to
Class A shares at an annual  rate of up to .25% of the  average  daily net asset
value of Class A  shares.  It is  expected  that  the  proceeds  from the fee in
respect  of  Class A  shares  will  be  used  primarily  to  compensate  Service
Organizations which enter into agreements with SFSI. Such Service  Organizations
will  receive  from  SFSI a  continuing  fee of up to .25% on an  annual  basis,
payable  quarterly,   of  the  average  daily  net  assets  of  Class  A  shares
attributable  to the  particular  Service  Organization  for providing  personal
service and/or the  maintenance of  shareholder  accounts.  The fee payable from
time to time is, within such limit, determined by the Trustees of the Fund.

     The Plan, as it relates to Class A shares,  was approved by the Trustees on
October 9, 1984 and was approved by the  shareholders of the Series on April 10,
1986.  The total amount paid for the year ended  December 31, 1997 in respect of
the Series' Class A shares pursuant to the Plan was equal to .24% of the Class A
shares' average daily net assets.

   
     Under the Plan, the Fund  reimburses  SFSI for its expenses with respect to
Class B and  Class D  shares  at an  annual  rate of up to 1% of the  respective
average  daily net asset value of the Class B and Class D shares.  Proceeds from
the Class B distribution fees are used to pay Service Organizations a continuing
fee of up to .25% on an annual  basis of the  average net asset value of Class B
shares  attributable to particular Service  Organizations for providing personal
service and/or the maintenance of shareholder  accounts and will also be used by
SFSI  to  defray  the  expense  of  the  payment  of 4%  made  by it to  Service
Organizations at the time of sale of Class B shares.  In that  connection,  SFSI
has  assigned FEP its interest in the fees payable to it in respect of the Class
B  shares,  other  than  the  portion  payable  to  Service  Organizations  on a
continuing basis. Proceeds from the Class D distribution fees are used primarily
to compensate Service Organizations for administration, shareholder services and
distribution  assistance  (including a continuing fee of up to .25% on an annual
basis of the  average  daily net asset value of Class D shares  attributable  to
particular  Service  Organizations  for providing  personal  service  and/or the
maintenance  of  shareholder  accounts)  and will  initially  be used by SFSI to
defray the expense of the payment of 1% made by it to Service  Organizations  at
the time of the sale of Class D shares.  The amounts expended by SFSI in any one
year upon the  initial  purchase  of Class B and Class D shares  may  exceed the
amounts received by it from Plan payments retained.  Expenses of administration,
shareholder  services  and  distribution  of Class B and  Class D shares  in one
fiscal  year  may be  respectively,  paid  from  Class B and  Class D Plan  fees
received in any other fiscal year.

     The Plan, as it relates to Class B shares,  was approved by the Trustees of
the Fund on March 21, 1996 and became  effective April 22, 1996. The Plan, as it
relates to Class D shares,  was amended by the  Trustees of the Fund on July 15,
1993.  The total amount paid for the year ended December 31, 1997 by the Series'
Class B and Class D shares  pursuant to the Plan was 1% per annum of the average
daily net assets of the Class B and Class D shares.  The Plan is reviewed by the
Fund's Trustees annually.
    

                                       22
<PAGE>

     Seligman Services,  Inc. ("SSI"), an affiliate of the Manager, is a limited
purpose  broker/dealer.   SSI  acts  as  a  broker/dealer  of  record  for  most
shareholder  accounts  that do not have a  designated  broker/dealer  of  record
including  all such  shareholder  accounts  established  after April 1, 1995 and
receives  compensation for providing personal service and account maintenance to
such accounts of record.

EXCHANGE PRIVILEGE

   
     A  shareholder  of the Series may,  without  charge,  exchange at net asset
value any part or all of an  investment  in the  Series  for shares of the other
series  of the Fund or for  shares of any of the other  Seligman  Mutual  Funds.
Exchanges may be made by mail, or by telephone if the  shareholder has telephone
services.
    

     Class A,  Class B and  Class D shares  may be  exchanged  only for Class A,
Class B and Class D shares, respectively, of another Seligman Mutual Fund on the
basis of relative net asset value.

   
     If shares that are subject to a CDSL are exchanged  for shares,  of another
Seligman  Mutual  Fund,  then for  purposes of  assessing  the CDSL payable upon
disposition  of the exchanged  shares,  the  applicable  holding period shall be
reduced by the period for which the original shares were held.

     Class B shareholders of the Series  exercising the exchange  privilege will
continue to be subject to the Series' CDSL  schedule if such  schedule is higher
or  longer  than  the CDSL  schedule  relating  to the new  Class B  shares.  In
addition,  Class B shares of the Series  acquired  through  use of the  exchange
privilege  will be subject to the  Series'  CDSL  schedule  if such  schedule is
higher or longer  than the CDSL  schedule  relating to the Class B shares of the
fund from which such shares were exchanged.
    

     The Seligman Mutual Funds available under the Exchange Privilege are:

o  SELIGMAN CAPITAL FUND, INC. seeks aggressive  capital  appreciation.  Current
   income is not an objective.

o  SELIGMAN  CASH  MANAGEMENT  FUND,  INC.  invests in high quality money market
   instruments. Shares are sold at net asset value.

o  SELIGMAN COMMON STOCK FUND, INC. seeks favorable current income and long-term
   growth of both income and capital  value  without  exposing  capital to undue
   risk.

o  SELIGMAN  COMMUNICATIONS  AND  INFORMATION  FUND,  INC.  invests in shares of
   companies  in the  communications,  information  and  related  industries  to
   produce capital gain. Income is not an objective.

o  SELIGMAN FRONTIER FUND, INC. seeks to produce growth in capital value. Income
   may be  considered  but will  only be  incidental  to the  fund's  investment
   objective.

o  SELIGMAN GROWTH FUND, INC. seeks  longer-term  growth in capital value and an
   increase in future income.

o  SELIGMAN  HENDERSON  GLOBAL  FUND  SERIES,  INC.  consists  of  the  Seligman
   Henderson  International Fund, the Seligman Henderson Emerging Markets Growth
   Fund, the Seligman Henderson Global Growth  Opportunities  Fund, the Seligman
   Henderson  Global Smaller  Companies Fund and the Seligman  Henderson  Global
   Technology Fund, which seek long-term capital appreciation  primarily through
   investing in companies either globally or internationally.

o  SELIGMAN  HIGH INCOME UND SERIES  seeks high  current  income by investing in
   debt securities. In addition to the Series, the Fund consists of the Seligman
   U.S. Government Securities Series.

o  SELIGMAN  INCOME FUND,  INC. seeks high current income and the possibility of
   improvement of future income and capital value.

o  SELIGMAN  MUNICIPAL FUND SERIES,  INC. consists of several State Series and a
   National  Series.  The National  Municipal  Series  seeks to provide  maximum
   income  exempt from federal  income  taxes;  individual  state  series,  each
   seeking to maximize income exempt from federal income taxes and from personal
   income  taxes in  designated  states are  available  for  Colorado,  Georgia,
   Louisiana, Maryland, Massachusetts,  Michigan, Minnesota, Missouri, New York,
   Ohio, Oregon and South Carolina. (Does not currently offer Class B shares.)



                                       23
<PAGE>

o  SELIGMAN  MUNICIPAL SERIES TRUST includes the Seligman  California  Municipal
   High-Yield  Series,  the Seligman  California  Municipal Quality Series,  the
   Seligman Florida  Municipal Series and the Seligman North Carolina  Municipal
   Series,  each of which  invests in  municipal  securities  of its  designated
   state. (Does not currently offer Class B shares.)

o  SELIGMAN NEW JERSEY  MUNICIPAL FUND,  INC.  invests in  investment-grade  New
   Jersey municipal securities. (Does not currently offer Class B shares.)

o  SELIGMAN  PENNSYLVANIA  MUNICIPAL  FUND  SERIES  invests in  investment-grade
   Pennsylvania municipal securities. (Does not currently offer Class B shares.)

   
o  SELIGMAN VALUE FUND SERIES,  INC.  consists of the Seligman  Large-Cap  Value
   Fund and the  Seligman  Small-Cap  Value Fund each of which  seeks  long-term
   capital  appreciation  by investing in equity  securities of value  companies
   primarily located in the U.S.

     All  permitted  exchanges  will be based  on the net  asset  values  of the
respective  funds determined at the close of regular trading on the NYSE on that
day.  Telephone  requests for exchanges received by the close of regular trading
on the NYSE (normally,  4:00 p.m. Eastern time), by Seligman Data Corp. at (800)
221-2450,  will be processed  as of the close of business on that day.  Requests
received after the close of regular trading on the NYSE will be processed at the
net  asset  values  per  share  calculated  the  following   business  day.  The
registration  of an account  into which an exchange is made must be identical to
the  registration  of  the  account  from  which  shares  are  exchanged.   When
establishing a new account by an exchange of shares,  the shares being exchanged
must have a value of at least the  minimum  initial  investment  required by the
mutual  fund into which the  exchange  is being  made.  THE METHOD OF  RECEIVING
DISTRIBUTIONS,  UNLESS OTHERWISE INDICATED, WILL BE CARRIED OVER TO THE NEW FUND
ACCOUNT, AS WILL TELEPHONE SERVICES. ACCOUNT SERVICES, SUCH AS INVEST-A-CHECK(R)
SERVICE,  DIRECTED  DIVIDENDS,  SYSTEMATIC  WITHDRAWAL  PLAN AND  CHECK  WRITING
PRIVILEGE WILL NOT BE CARRIED OVER TO THE NEW FUND ACCOUNT  UNLESS  SPECIFICALLY
REQUESTED AND PERMITTED BY THE NEW FUND. Exchange orders may be placed to effect
an exchange  of a specific  number of shares,  an exchange of shares  equal to a
specific  dollar  amount or an  exchange  of all shares  held.  Shares for which
certificates  have been issued may not be  exchanged  via  telephone  and may be
exchanged  only  upon  receipt  of a  written  exchange  request  together  with
certificates representing shares to be exchanged in proper form.

     The Exchange Privilege via mail is generally applicable to group retirement
plans, although some restrictions may apply. The terms of the Exchange Privilege
described herein may be modified at any time; and not all of the Seligman Mutual
Funds are available to residents of all states.  Before  making any exchange,  a
shareholder  should  contact an  authorized  investment  dealer or Seligman Data
Corp. to obtain prospectuses of any of the Seligman Mutual Funds.
    

     A broker/dealer  representative  of record will be able to effect exchanges
on behalf of a shareholder only if the shareholder has telephone  services or if
the  broker/dealer  has entered into a Telephone  Exchange  Agreement  with SFSI
wherein the  broker/dealer  must agree to indemnify SFSI and the Seligman Mutual
Funds  from any loss or  liability  incurred  as a result of the  acceptance  of
telephone exchange orders.

     Written  confirmation of all exchanges will be forwarded to the shareholder
to whom the exchanged shares are registered and a duplicate confirmation will be
sent to the dealer of record  listed on the account.  SFSI reserves the right to
reject any telephone exchange request. Any rejected telephone exchange order may
be processed by mail. For more information about telephone exchanges,  including
the  circumstances  under  which  shareholders  may  bear the risk of loss for a
fraudulent transaction, see "Telephone Transactions."

     Exchanges  of shares are sales and may result in a gain or loss for federal
income tax purposes.

FURTHER INFORMATION ABOUT
TRANSACTIONS IN THE SERIES

     Because excessive trading (including  short-term,  "market timing" trading)
can hurt the Series' performance,  the Fund may refuse any exchange (1) from

                                       24
<PAGE>

anyshareholder account from which there have been two exchanges in the preceding
three month period,  or (2) where the exchanged shares equal in value the lesser
of  $1,000,000  or 1% of the Series'  net  assets.  The Fund may also refuse any
exchange or purchase order from any  shareholder  account if the  shareholder or
the  shareholder's  broker/dealer  has been  advised that  previous  patterns of
purchases and redemptions or exchanges have been considered excessive.  Accounts
under common  ownership or control,  including  those with the same  taxpayer ID
number and those  administered  so as to redeem or  purchase  shares  based upon
certain predetermined market indicators, will be considered one account for this
purpose.  Additionally,  the Fund reserves the right to refuse any order for the
purchase of shares.

   
DIVIDENDS AND CAPITAL GAIN DISTRIBUTIONS
    

     The Series' net investment income is distributed to shareholders monthly in
the form of additional shares, unless the shareholder elects otherwise. Payments
vary in amount  depending on income  received from the Series'  investments  and
costs of operations. Shares begin earning dividends on the day on which the Fund
receives  payment.  Shares continue to earn dividends through the date preceding
the date they are redeemed.

   
     The Series  distributes  substantially all of any taxable net long-term and
short-term gain realized on investments to  shareholders  at least annually.  In
determining  amounts  of  capital  gains to be  distributed,  any  capital  loss
carryforwards  from prior years will offset  capital gains.  Such  distributions
will generally be taxable to shareholders in the year in which they are declared
by the Series if paid before February 1 of the following year.

     Shareholders   may  elect:   (1)  to  receive  both   dividends   and  gain
distributions in shares; (2) to receive dividends in cash and gain distributions
in shares;  (3) to receive both dividends and gain  distributions  in cash. Cash
dividends and gain distributions are paid by check and sent to the shareholder's
address  of  record  or,  if  elected  by a  shareholder  who has  current  bank
information on file with Seligman Data Corp.,  electronically deposited into the
shareholder's  predesignated  bank  account.  Such  deposits  will  normally  be
credited to the  shareholder's  bank  account in 3 to 4 business  days after the
payable date of the dividend or distribution.

     In the case of prototype retirement plans, dividends and gain distributions
are reinvested in additional shares.  Unless another election is made, dividends
and capital  gain  distributions  will be credited  to  shareholder  accounts in
additional  shares.  Shares acquired through a dividend or gain distribution and
credited to a shareholder's  account are not subject to an initial sales load or
a CDSL.  Dividends  and gain  distributions  paid in shares are  invested on the
payable  date using the net asset value of the payable  date.  Shareholders  may
elect to change their dividend and gain distribution options by writing Seligman
Data Corp.  at the  address  listed  below.  If the  shareholder  has  telephone
services,  changes may also be telephoned  to Seligman  Data Corp.  between 8:30
a.m. and 6:00 p.m. Eastern time, by either the shareholder or the  broker/dealer
of record on the account. For information about electing telephone services, see
"Telephone  Transactions."  These  elections  must be received by Seligman  Data
Corp.  before the record date for the dividend or gain  distribution in order to
be effective for such dividend or gain  distribution.  For information on how to
have   dividend  or  gain   distributions   electronically   deposited   into  a
shareholder's bank account, contact Seligman Data Corp.
    

      The per share dividends from net investment  income on Class B and Class D
shares will be lower than the per share  dividends on Class A shares as a result
of the higher  distribution  fees applicable with respect to Class B and Class D
shares.  Per share dividends of the three classes may also differ as a result of
differing  class expenses.  Distributions  of net capital gains, if any, will be
paid in the same amount for Class A, Class B and Class D shares.  See  "Purchase
of Shares--Valuation."

     Shareholders  exchanging  shares of one  mutual  fund for shares of another
mutual fund in the Seligman  Group will continue to receive  dividends and gains
as elected prior to such exchange unless otherwise specified.  In the event that
a shareholder  redeems,  transfers or exchanges all shares in an account between
the



                                       25
<PAGE>

   
record  date  and  the  payable  date,  the  value  of  any  dividends  or  gain
distributions declared will be paid in cash regardless of the existing election.
A transfer or exchange of all shares  (closing an  account),  between the record
date  and  payable  date,  will  result  in  the  value  of  dividends  or  gain
distributions  being paid to the new fund account in accordance  with the option
on the closed account, unless Seligman Data Corp. is instructed otherwise.
    

FEDERAL INCOME TAXES

     The Series intends to continue to qualify as a regulated investment company
under the Code.  For each year so  qualified,  the Series will not be subject to
federal  income taxes on its net investment  income and capital  gains,  if any,
realized  during any  taxable  year which it  distributes  to its  shareholders,
provided  that at least  90% of its net  investment  income  and net  short-term
capital gains are distributed to shareholders each year.

     Dividends from net investment income and distributions  from net short-term
capital gains are taxable as ordinary income to  shareholders,  whether received
in cash or reinvested in additional shares, and are, generally, not eligible for
the dividends received deduction for corporations.

   
     Distributions  of net  capital  gain  (i.e.,  the  excess of net  long-term
capital gains over any net short-term  losses) are taxable as long-term  capital
gain, whether received in cash or invested in additional  shares,  regardless of
how long  shares have been held by a  shareholder.  Such  distributions  are not
eligible for the dividends received deduction allowed to corporate shareholders.
Shareholders receiving  distributions in the form of additional shares issued by
the Series will be treated for federal income tax purposes as having  received a
distribution  in an  amount  equal  to the  fair  market  value  on the  date of
distribution of the shares received.  Individual shareholders will be subject to
federal  income tax on  distributions  of net capital gains at a maximum rate of
28% if designated  as derived from the Series'  capital gains from property held
for more than one year and at a maximum  rate of 20% if  designated  as  derived
from the Series' capital gains from property held for more than eighteen months.
The Series must exhaust its capital loss carryforward before it may make capital
gain distributions to shareholders.

     Any gain or loss realized upon a sale or redemption of shares in the Series
by a shareholder  who is not a dealer in securities will generally be treated as
a long-term  capital gain or loss if the shares have been held for more than one
year and otherwise as a short-term capital gain or loss. Individual shareholders
will be subject to federal income tax on net capital at a maximum rate of 28% in
respect  of shares  held for more than one year and at a maximum  rate of 20% in
respect of shares held for more than  eighteen  months.  Net  capital  gain of a
corporate shareholder is taxed at the same rate as ordinary income.  However, if
shares on which a long-term  capital  gain  distribution  has been  received are
subsequently  sold or redeemed  and such shares have been held for six months or
less, any loss realized will be treated as long-term  capital loss to the extent
that it offsets the long-term capital gain  distribution.  In addition,  no loss
will be  allowed  on the sale or other  disposition  of shares of the Series if,
within a period  beginning  30 days before the date of such sale or  disposition
and  ending 30 days  after  such  date,  the  holder  acquires  (such as through
dividend reinvestment) securities that are substantially identical to the shares
of the Series.
    

     In  determining  gain or loss on  shares  of the  Series  that  are sold or
exchanged within 90 days after acquisition,  a shareholder generally will not be
permitted to include in the tax basis attributable to such shares the sales load
incurred in acquiring such shares to the extent of any  subsequent  reduction in
the sales load by reason of the Exchange or Reinstatement  Privilege  offered by
the Series.  Any sales load not taken into account in determining  the tax basis
of shares sold or exchanged  within 90 days after  acquisition  will be added to
the  shareholder's  tax basis in the shares acquired pursuant to the Exchange or
Reinstatement Privilege.

     The Series will  generally  be subject to an excise tax of 4% on the amount
of any income or capital gains,  above certain permitted levels,  distributed to
shareholders  on a basis  such  that  such  income  or gain  is not  tax-

                                       26
<PAGE>

   
able to shareholders  in the calendar year in which it was earned.  Furthermore,
dividends  declared in October,  November or December payable to shareholders of
record on a  specified  date in such a month and paid in the  following  January
will  be  treated  as  having  been  paid by the  Series  and  received  by each
shareholder in December.  Under this rule, therefore,  shareholders may be taxed
in one year on dividends or gain  distributions  actually received in January of
the following year.
    

     Shareholders are urged to consult their tax advisors  concerning the effect
of federal income taxes in their individual circumstances.

     UNLESS A SHAREHOLDER  INCLUDES A CERTIFIED TAXPAYER  IDENTIFICATION  NUMBER
(SOCIAL  SECURITY  NUMBER  FOR  INDIVIDUALS)  ON  THE  ACCOUNT  APPLICATION  AND
CERTIFIES THAT THE SHAREHOLDER IS NOT SUBJECT TO BACKUP WITHHOLDING, THE FUND IS
REQUIRED TO WITHHOLD AND REMIT TO THE U.S.  TREASURY A PORTION OF  DISTRIBUTIONS
AND OTHER REPORTABLE PAYMENTS TO THE SHAREHOLDER. THE RATE OF BACKUP WITHHOLDING
IS 31%. SHAREHOLDERS SHOULD BE AWARE THAT, UNDER REGULATIONS  PROMULGATED BY THE
INTERNAL  REVENUE  SERVICE,  THE FUND MAY BE FINED $50 ANNUALLY FOR EACH ACCOUNT
FOR WHICH A CERTIFIED  TAXPAYER  IDENTIFICATION  NUMBER IS NOT PROVIDED.  IN THE
EVENT THAT SUCH A FEE IS IMPOSED, THE FUND MAY CHARGE A SERVICE FEE OF UP TO $50
THAT MAY BE  DEDUCTED  FROM THE  SHAREHOLDER'S  ACCOUNT  AND OFFSET  AGAINST ANY
UNDISTRIBUTED  DIVIDENDS AND CAPITAL GAIN DISTRIBUTIONS.  THE FUND ALSO RESERVES
THE  RIGHT TO CLOSE  ANY  ACCOUNT  WHICH  DOES  NOT  HAVE A  CERTIFIED  TAXPAYER
IDENTIFICATION NUMBER.

SHAREHOLDER INFORMATION

     Shareholders  will be sent  reports  semi-annually  regarding  the  Series.
General  information  about the Series may be requested by writing the Corporate
Communications/Investor   Relations   Department,   J.  &  W.   Seligman  &  Co.
Incorporated,  100  Park  Avenue,  New  York,  NY 10017  or by  telephoning  the
Corporate   Communications/Investor  Relations  Department  toll-free  at  (800)
221-7844 from all continental United States,  except New York, or (212) 850-1864
in New  York  State  and the  Greater  New York  City  area.  Information  about
shareholder accounts may be requested by writing Shareholder Services,  Seligman
Data  Corp.  at the same  address or by  toll-free  telephone  by dialing  (800)
221-2450 from all  continental  United  States,  or (212)  682-7600  outside the
continental United States.  Seligman Data Corp. may be telephoned Monday through
Friday (except  holidays),  between the hours of 8:30 a.m. and 6:00 p.m. Eastern
time, and calls will be answered by a service representative.

   
     24 HOUR  TELEPHONE  ACCESS IS  AVAILABLE  BY DIALING  (800)  622-4597  ON A
TOUCHTONE PHONE, WHICH PROVIDES INSTANT ACCESS TO PRICE, YIELD, ACCOUNT BALANCE,
MOST RECENT TRANSACTION AND OTHER INFORMATION.  IN ADDITION,  ACCOUNT STATEMENTS
AND FORM  1099-DIV MAY BE ORDERED.  TO INSURE  PROMPT  DELIVERY OF  DISTRIBUTION
CHECKS, ACCOUNT STATEMENTS AND OTHER INFORMATION,  SELIGMAN DATA CORP. SHOULD BE
NOTIFIED  IMMEDIATELY IN WRITING OF ANY ADDRESS  CHANGE.  ADDRESS CHANGES MAY BE
TELEPHONED TO SELIGMAN DATA CORP. IF THE SHAREHOLDER HAS TELEPHONE SERVICES. FOR
MORE INFORMATION ABOUT TELEPHONE SERVICES, SEE "TELEPHONE TRANSACTIONS" ABOVE.
    

     ACCOUNT   SERVICES.   Shareholders  are  sent   confirmation  of  financial
transactions in their Account.

     Other investor services are available. These include:

   
     O INVEST-A-CHECK(R)  SERVICE enables a shareholder to authorize  additional
purchases  of  shares  automatically  bY  electronic  funds  transfer  from  the
shareholder's savings or checking account, if the shareholder's bank is a member
of ACH, or by  preauthorized  checks to be drawn on the  shareholder's  checking
account at regular monthly  intervals in fixed amounts of $100 or more per fund,
or regular  quarterly  intervals in fixed  amounts of $250 or more per fund,  to
purchase   shares.   Accounts   may  be   established   concurrently   with  the
Invest-A-Check(R)  Service only if  accompanied  by a check for at least $100 in
conjunction with the monthly  investment  option or a check for at least $250 in
conjunction  with  the  quarterly  investment  option.  For  investments  in the
Seligman Time Horizon 



                                       27
<PAGE>

Matrix(SM) Asset Allocation Program, the minimum amount is
$500 at regular monthly intervals or $1,000 at regular quarterly  intervals.  By
utilizing  the  Invest-A-Check(R)  Service  to  establish  an  account,  you are
agreeing to continue the service until the Series' minimum investment is met. If
you elect to cancel the service  prior to meeting the minimum,  your account may
be subject to closure. (See "Terms and Conditions.")
    

     O AUTOMATIC DOLLAR-COST-AVERAGING SERVICE permits a shareholder of Seligman
Cash  Management  Fund to  exchange  a  specified  amount,  at  regular  monthly
intervals  in fixed  amounts  of $100 or more per  fund,  or  regular  quarterly
intervals in fixed amounts of $250 or more per fund, from shares of any class of
the Cash  Management  Fund into  shares of the same class of any other  Seligman
Mutual Fund  registered in the same name.  For exchanges  into the Seligman Time
Horizon MatrixSM Asset Allocation Program, the minimum amount is $500 at regular
monthly  intervals or $1,000 at regular quarterly  intervals.  The shareholder's
Cash  Management  Fund  account  must  have a value  of at least  $5,000  at the
initiation of the service. Exchanges will be made at the public offering price.

   
     O DIVIDENDS FROM OTHER INVESTMENTS permits a shareholder to order dividends
payable on shares of other  companies to be paid to and  invested in  additional
shares of the Series or another  Seligman  Mutual  Fund.  (Dividend  checks must
include the  shareholder's  name,  account number,  the name of the fund and the
class of shares in which the  investment is to be made.) If the dividends are to
be invested in a new fund account,  the first  investment must meet the required
minimum purchase amount for such fund.

     A  shareholder  may also direct that  dividends  payable on shares of other
companies  be  transferred  electronically  to purchase  shares of any  Seligman
Mutual Fund,  if the other  company  provides  this  service.  See  "Purchase of
Shares" or contact Seligman Data Corp. for more information.
    

     O AUTOMATIC CD TRANSFER SERVICE permits a shareholder to instruct a bank to
invest the proceeds of a maturing bank  certificate  of deposit ("CD") in shares
of any  designated  Seligman  Mutual  Fund.  Shareholders  who  wish to use this
service should  contact  Seligman Data Corp. or a broker to obtain the necessary
documentation.  Banks may  charge a  penalty  on CD  assets  withdrawn  prior to
maturity.  Accordingly,  it will not  normally be  advisable  to  liquidate a CD
before its maturity.

   
     O SYSTEMATIC  WITHDRAWAL  PLAN permits  payments in fixed amounts of $50 or
more at regular  intervals  to be made to a  shareholder  who owns or  purchases
shares worth $5,000 or more held as book credits. Payments will be sent by check
to the address  designated by the shareholder or, if elected by a holder who has
current  bank  information  on file with  Seligman  Data  Corp.,  electronically
deposited into the shareholder's  predesignated bank account. Such deposits will
normally be credited to the  shareholder's  bank account in 2 to 3 business days
after the shares are redeemed from the  shareholder's  fund account.  Holders of
Class A shares  purchased  at net asset value  because the  purchase  amount was
$1,000,000 or more should bear in mind that  withdrawals  may be subject to a 1%
CDSL if made within eighteen months of purchase of such shares. Holders of Class
B and Class D shares may elect to use this plan  immediately,  although  certain
withdrawals may be subject to a CDSL. (See "Terms and Conditions.")
    

     O DIRECTED  DIVIDENDS  allows a  shareholder  to pay  dividends  to another
person or to direct the payment of such  dividends  to another  Seligman  Mutual
Fund for purchase at net asset value.  Dividends on Class A, Class B and Class D
shares may only be  directed  to shares of the same  class of  another  Seligman
Mutual Fund.

     O OVERNIGHT  DELIVERY to service  shareholder  requests is available  for a
$15.00 fee which will be debited from a shareholder's account, if requested.

     O COPIES OF ACCOUNT  STATEMENTS  will be sent to each  shareholder  free of
charge for the  current  year and most  recent  prior  year.  Copies of year-end
statements  for prior years back to 1985 are  available  for a fee of $10.00 per
year, per account, with a maximum charge of $150 per account. Statement requests
should be forwarded, along with a check, to Seligman Data Corp.

                                       28
<PAGE>

   
     TAX-DEFERRED PLANS. Shares of the Series may be purchased for:

     --Individual  Retirement Accounts (IRAs),  including Traditional IRAs, Roth
IRAs and Education IRAs;
    
     --Savings Incentive Match Plans for Employees (SIMPLE IRAs);

     --Simplified Employee Pension Plans (SEPs);

     --Section 401(k) Plans for corporations and their employees;

     --Section  403(b)(7)  Plans for  employees  of public  school  systems  and
certain  non-profit   organizations  who  wish  to  make  deferred  compensation
arrangements; and

     --Money  Purchase  Pension  and  Profit  Plans  for  sole  proprietorships,
partnerships and corporations.
  
     These  types of plans may be  established  only upon  receipt  of a written
application  form.  The Fund may register an IRA investment for which an account
application has not been received as an ordinary taxable account.

     For more information,  write Retirement Plan Services, Seligman Data Corp.,
100 Park Avenue, New York, NY 10017, or telephone  toll-free (800) 445-1777 from
all  continental  United  States.  You also may receive  information  through an
authorized dealer.

ADVERTISING THE SERIES' PERFORMANCE

     From time to time the Series  advertises  its "yield,"  "total  return" and
"average annual total return", each of which are calculated separately for Class
A, Class B and Class D shares.  THESE FIGURES ARE BASED ON  HISTORICAL  EARNINGS
AND ARE NOT INTENDED TO INDICATE FUTURE  PERFORMANCE.  The "yield" of a class of
the Series refers to the income  generated by an investment in that class over a
30-day period.  This income is then  "annualized." That is, the amount of income
generated by the investment during that 30-day period is assumed to be generated
each  30-day  period  for twelve  periods  and is shown as a  percentage  of the
investment. The income earned on the investment is also assumed to be reinvested
at the  end of the  sixth  30-day  period.  The  "total  return"  shows  what an
investment in shares of a class of the Series would have earned over a specified
period of time (for example,  one, five and ten year periods or since inception)
assuming the payment of the maximum sales load, if any, when the  investment was
first made (or CDSL upon redemption,  if applicable) and that all  distributions
and dividends by that class were reinvested on the reinvestment dates during the
period.  The "average  annual total  return" is the annual rate required for the
initial  payment to grow to the amount which would be received at the end of the
specified period (one, five and ten year periods or since inception);  i.e., the
average  annual  compound  rate of return.  The total  return and average  total
return for both Class A and Class D shares for periods  prior to January 1, 1996
do not reflect the increase in the  management fee payable by the Fund effective
on such date,  which if reflected  would reduce the  performance  quoted.  Total
return and average annual total return may also be presented  without the effect
of the initial sales load or CDSL, as applicable.

     From time to time,  reference  may be made in  advertising  or  promotional
material to performance information, including mutual fund rankings, prepared by
Lipper Analytical Services,  Inc. ("Lipper"),  an independent  reporting service
which monitors the  performance of mutual funds. In calculating the total return
of the Series' Class A, Class B and Class D shares,  the Lipper analysis assumes
investment  of all  dividends  and  distributions  paid but  does not take  into
account  applicable sales loads. The Series may also refer in  advertisements or
in other promotional material to articles, comments, listings and columns in the
financial  press  pertaining  to  the  Series'  performance.  Examples  of  such
financial  and  other  press  publications  include  BARRON'S,   BUSINESS  WEEK,
CDA/WEISENBERGER  MUTUAL FUNDS  INVESTMENT  REPORT,  CHRISTIAN  SCIENCE MONITOR,
FINANCIAL  PLANNING,   FINANCIAL  TIMES,   FINANCIAL  WORLD,  FORBES,   FORTUNE,
INDIVIDUAL INVESTOR,  INVESTMENT ADVISOR, INVESTORS BUSINESS DAILY, KIPLINGER'S,
LOS ANGELES TIMES, MONEY MAGAZINE,  MORNINGSTAR, INC., PENSIONS AND INVESTMENTS,
SMART MONEY, THE NEW YORK TIMES, USA TODAY, U.S. NEWS AND WORLD REPORT, THE WALL
STREET JOURNAL, WASHINGTON POST, WORTH MAGAZINE and YOUR MONEY.

                                       29
<PAGE>

ORGANIZATION AND CAPITALIZATION

     The Fund is a diversified, open-end management investment company organized
under the laws of the  Commonwealth of  Massachusetts  by a Declaration of Trust
dated July 27, 1984.  The  Declaration of Trust permits the Trustees to issue an
unlimited number of full and fractional shares of beneficial interest, $.001 par
value, in separate series. The Trustees also have the power to create additional
series of shares.

     At present,  shares of  beneficial  interest of two series are  authorized,
which shares of beneficial  interest  constitute  interest in the Series and the
Seligman U.S. Government Securities Series. Shares of beneficial interest of the
Series and the Seligman U.S. Government Securities Series are divided into three
classes  (Class A, Class B and Class D). Each of the  Series'  and the  Seligman
U.S.  Government  Securities  Series'  Class A,  Class B and  Class D shares  of
beneficial  interest  is equal as to  earnings,  assets and  voting  privileges,
except that each class bears its own  separate  distribution  and,  potentially,
certain other class expenses and has exclusive voting rights with respect to any
matter  to which a  separate  vote of any class is  required  by the 1940 Act or
Massachusetts  law. The Fund has adopted a plan (the "Multiclass Plan") pursuant
to Rule 18f-3 under the 1940 Act  permitting  the  issuance and sale of multiple
classes of beneficial interest. In accordance with the Declaration of Trust, the
Trustees  may  authorize  the  creation  of  additional  classes  of  shares  of
beneficial interest with such characteristics as are permitted by the Multiclass
Plan and Rule  18f-3.  The 1940 Act  requires  that  where  more  than one class
exists, each class must be preferred over all other classes in respect of assets
specifically  allocated to such class.  Shares entitle their holders to one vote
per share.  Shares have  noncumulative  voting rights, do not have preemptive or
subscription rights and are transferable. It is the intention of the Fund not to
hold Annual Meetings of Shareholders.  The Trustees may call Special Meetings of
Shareholders  for action by shareholder  vote as may be required by the 1940 Act
or Declaration of Trust.  Pursuant to the 1940 Act, shareholders have to approve
the adoption of any management  contract,  distribution  plan and any changes in
fundamental  investment  policies.  Shareholders  also  have the right to call a
meeting of shareholders  for the purpose of voting on the removal of one or more
Trustees.  Such  removal can be effected  upon the action of  two-thirds  of the
outstanding shares of the Fund.

                                       30

<PAGE>


                                    APPENDIX

Moody's Investors Service, Inc.
Bonds and Notes

BAA:  Bonds  and  notes  which are  rated  Baa are  considered  as medium  grade
obligations,  i.e.,  they are  neither  highly  protected  nor  poorly  secured.
Interest  payments and principal  security  appear  adequate for the present but
certain  protective  elements  may  be  lacking  or  may  be  characteristically
unreliable over any great length of time.  Such bonds or notes lack  outstanding
investment  characteristics and in fact may have speculative  characteristics as
well.

BA: Bonds and notes which are rated Ba are judged to have speculative  elements;
their future  cannot be  considered  as  well-assured.  Often the  protection of
interest and  principal  payments may be very  moderate,  and therefore not well
safeguarded  during  other good and bad times over the  future.  Uncertainty  of
position characterizes bonds and notes in this class.

B:  Bonds  and  notes  which are rated B  generally  lack  characteristics  of a
desirable  investment.  Assurance  of  interest  and  principal  payments  or of
maintenance  of other terms of the contract  over any long period of time may be
small.

CAA: Bonds and notes which are rated Caa are of poor  standing.  Such issues may
be in  default  or there may be  present  elements  of danger  with  respect  to
principal or interest.

CA:  Bonds  and  notes  which  are  rated Ca  represent  obligations  which  are
speculative  in high  degree.  Such  issues  are often in  default or have other
marked shortcomings.

C:  Bonds and notes  which are rated C are the  lowest  rated  class of bonds or
notes, and issues so rated can be regarded as having extremely poor prospects of
ever attaining any real investment standing.

Standard & Poor's Rating Service ("S&P")
Bonds

BBB: Bonds rated BBB are regarded as having a satisfactory  degree of safety and
capacity  to pay  principal  and  interest  and repay  principal.  Whereas  they
normally exhibit adequate protection parameters,  adverse economic conditions or
changing  circumstances  are more  likely to lead to a weakened  capacity to pay
interest and repay principal for bonds in this category than for bonds in higher
rated categories.

BB, B, CCC,  CC:  Bonds  rated BB, B, CCC and CC are  regarded  on  balance,  as
predominantly  speculative  with  respect to capacity to pay  interest and repay
principal in  accordance  with the terms of the bond.  BB  indicates  the lowest
degree of speculation and CC the highest degree of speculation. While such bonds
will  likely  have  some  quality  and  protective  characteristics,  these  are
outweighed by large uncertainties or major risk exposures to adverse conditions.

C: The rating C is reserved for bonds on which no interest is being paid.

D: Bonds rated D are in default,  and payment of interest  and/or  repayment  of
principal is in arrears.

NR:  Indicates  that no rating has been  requested,  that there is  insufficient
information  on which to base a  rating  or that S&P does not rate a  particular
type of bond as a matter of policy.

                                       31

<PAGE>


                              TERMS AND CONDITIONS
                           GENERAL ACCOUNT INFORMATION

   
    Investments  will  be  made  in as  many  shares  of the  Series,  including
fractions to the third decimal place, as can be purchased at the net asset value
plus a sales load, if applicable, at the close of business on the day payment is
received.  If a check  received in payment of a purchase of shares is dishonored
for any reason,  Seligman Data Corp. may cancel the purchase and may also redeem
additional  shares,  if any,  held in the  shareholder's  account  in an  amount
sufficient  to reimburse the Fund for any loss it may have incurred and charge a
$10.00 return check fee.  Shareholders  will receive  dividends from  investment
income and any  distributions  from gain realized on investments in shares or in
cash according to the option  elected.  Dividend and gain options may be changed
by  notifying  Seligman  Data Corp.  These  option  changes  must be received by
Seligman Data Corp.  before the record date for the dividend or  distribution to
be effective for such dividend or distribution.  Stock  certificates will not be
issued unless requested.  Replacement  stock  certificates and certain waiver of
probate proceedings will be subject to a surety fee.
    

                            INVEST-A-CHECK(R) SERVICE

   
    The  Invest-A-Check(R)  Service  is  available  to  all  shareholders.   The
application is subject to acceptance by the shareholder's bank and Seligman Data
Corp. The electronic funds transfer ("ACH debit") or preauthorized  check in the
amount specified will be drawn  automatically on the  shareholder's  bank on the
fifth day (unless  otherwise  specified) of each month (or on the prior business
day if such  day of the  month  falls  on a  weekend  or  holiday)  in  which an
investment  is scheduled and invested at the close of business on the same date.
By utilizing  the  Invest-A-Check(R)  Service to  establish an account,  you are
agreeing to continue the service until the Series' minimum  investment amount is
met.  If you elect to cancel the  Service  prior to meeting  the  minimum,  your
account may be subject to closure. If an ACH debit or preauthorized check is not
honored by the  shareholder's  bank,  or if the value of shares held falls below
the required minimum,  the  Invest-A-Check(R)  Service may be suspended.  In the
event that a check or ACH debit is returned  uncollectable,  Seligman Data Corp.
will cancel the purchase, redeem shares held in the shareholder's account for an
amount  sufficient  to reimburse the Fund for any loss it may have incurred as a
result, and charge a $10.00 return check fee. This fee will be deducted from the
shareholder's  account.  The  Invest-A-Check(R)  Service may be reinstated  upon
written request  indicating  that the cause of interruption  has been corrected.
The  Invest-A-Check(R)  Service may be terminated by the shareholder or Seligman
Data Corp. at any time by written  notice.  The  shareholder  agrees to hold the
Fund and its agents free from all  liability  which may result from acts done in
good  faith  and  pursuant  to  these  terms.   Instructions   for  establishing
Invest-A-Check(R) Service are given on the Account Application. In the event the
shareholder  exchanges  all of the shares from one mutual  fund in the  Seligman
Group to  another,  the  Invest-A-Check(R)  Serivce  will be  terminated  in the
Seligman Mutual Fund that was closed as result of the exchange of all shares and
the shareholder must re-apply for the Invest-A-Check(R)  Service in the Seligman
Mutual  Fund  into  which  the  exchange  was  made.  In the  event of a partial
exchange, the Invest-A-Check(R) Service will be continued,  subject to the above
conditions,  in the  Seligman  Mutual  Fund from  which the  exchange  was made.
Accounts established in conjunction with the  Invest-A-Check(R)  Service must be
accompanied  by a  check  for at  least  $100 in  connection  with  the  monthly
investment  option or a check for at least $250 in connection with the quarterly
investment option. If the shareholder uses the Invest-A-Check(R) Service to make
an IRA or group retirement plan  investment,  the purchase will be credited as a
current year contribution.

                           SYSTEMATIC WITHDRAWAL PLAN

    A  sufficient  number of full and  fractional  shares  will be  redeemed  to
provide the amount  required for a scheduled  payment and any  applicable  CDSL.
Redemptions  will be made at the  asset  value at the close of  business  on the
specific  day of each  month  designated  by the  shareholder  (or on the  prior
business day if the day  specified  falls on a weekend or holiday)  less, in the
case of Class B and Class D shares, any applicable CDSL. Systematic  withdrawals
of Class A shares which were  purchased at net asset value  because the purchase
amount was $1,000,000 or more will be subject to a CDSL if made within  eighteen
months  of  purchase  of such  shares.  Under  this  plan,  a Class B or Class D
shareholder  who  requests  both  dividends  and capital gain  distributions  in
additional  shares may withdraw up to 12%, or 10%,  respectively of the value of
the shareholder's fund account (at the time of election) per annum,  without the
imposition  of a CDSL.  A minimum  payment  amount of $50 per cycle is needed to
establish this plan. A shareholder  may change the amount of scheduled  payments
or may suspend  payments by written  notice to Seligman  Data Corp. at least ten
days prior to the effective date of such a change or suspension. The plan may be
terminated  by the  shareholder  or Seligman  Data Corp.  at any time by written
notice.  It will be terminated  upon proper  notification  of the death or legal
incapacity of the shareholder. This plan is considered terminated in the event a
withdrawal of shares, other than to make scheduled withdrawal payments,  reduces
the value of shares remaining on deposit to less than $5,000. Continued payments
in excess of  dividend  income  invested  will  reduce  and  ultimately  exhaust
capital.  Withdrawals,  concurrent with purchases of shares of this or any other
investment  company,   will  be  disadvantageous   because  of  the  payment  of
duplicative sales loads, if applicable. For this reason, additional purchases of
Series shares are discouraged when the Withdrawal Plan is in effect.
    

                     LETTER OF INTENT -- CLASS A SHARES ONLY

    Seligman Financial Services,  Inc. will hold in escrow shares equal to 5% of
the minimum  purchase  amount  specified.  Dividends  and  distributions  on the
escrowed  shares will be paid to the  shareholder  or credited to their account.
Upon  completion of the specified  minimum  purchase  within the  thirteen-month
period,  all shares  held in escrow  will be  deposited  into the  shareholder's
account or  delivered  to the  shareholder.  A  shareholder  may include  toward
completion of a Letter of Intent the total asset value of shares of the Seligman
Mutual  Funds  on  which an  initial  sales  load was paid as of the date of the
Letter. If the total amount invested within the  thirteen-month  period does not
equal  or  exceed  the  specified  minimum  purchase,  the  shareholder  will be
requested  to pay the  difference  between the amount of the sales load paid and
the amount of the sales load  applicable to the total  purchase made. If, within
20 days following the mailing of a written request, the shareholder has not paid
this additional  sales load to Seligman  Financial  Services,  Inc.,  sufficient
escrowed  shares will be  redeemed  for  payment of the  additional  sales load.
Shares  remaining  in  escrow  after  this  payment  will  be  released  to  the
shareholder's account. The intended purchase amount may be increased at any time
during  the  thirteen-month  period by filing a revised  Agreement  for the same
period,  provided that the Dealer furnishes evidence that an amount representing
the reduction in sales load under the new Agreement, which becomes applicable on
purchases  already  made under the original  Agreement,  will be refunded to the
Fund and that the required  additional  escrowed shares will be purchased by the
shareholder.

    Shares of Seligman Cash Management Fund, Inc. which have been acquired by an
exchange of shares of another  Seligman Mutual Fund on which there is an initial
sales load may be taken into account in  completing  a Letter of Intent,  or for
Right of  Accumulation.  However,  shares of the Seligman Cash  Management  Fund
which have been  purchased  directly may not be used for purposes of determining
reduced sales loads on additional purchases of the other Seligman Mutual Funds .

                            CHECK REDEMPTION SERVICE

    The check Redemption Service is available to Class A shareholders,  to Class
B shareholders  and to Class D shareholders  with respect to Class D shares held
for one year or more.

    If shares  are held in joint  names,  all  shareholders  must sign the Check
Redemption  section of the  Account  Application.  All checks  will  require all
signatures unless a lesser number is indicated in the Check Redemption  section.
Accounts in the names of corporations,  trusts, partnerships, etc. must list all
authorized signatories.

    In all  cases,  each  signature  guarantees  the  genuineness  of the  other
signatures. Checks may not be drawn for less than $500.

    The shareholder authorizes Boston Safe Deposit and Trust Co. to honor checks
drawn by the  shareholder on the account of Seligman  High-Yield Bond Series and
to effect a redemption  of  sufficient  shares in the  shareholder's  account to
cover  payment of the check and, in the case of Class B shares,  any  applicable
CDSL. The shareholder  understands  that shares in one series of the Fund cannot
be redeemed to cover a check written on another series.

    Boston  Safe  Deposit  and  Trust  Co.  shall  be  liable  only  for its own
negligence.  The Fund will not be liable for any loss,  expense or cost  arising
out of check  redemptions.  The Fund  reserves  the right to  change,  modify or
terminate  this service at any time upon  notification  mailed to the address of
record of the shareholder(s).

    Seligman  Data  Corp.  will  charge a $10.00  processing  fee for any  check
redemption  draft returned marked  "unpaid." This charge may be DEBITED from the
account the check was drawn against.  NO REDEMPTION PROCEEDS WILL BE REMITTED TO
A SHAREHOLDER WITH RESPECT TO SHARES PURCHASED BY CHECK (UNLESS CERTIFIED) UNTIL
SELIGMAN DATA CORP.  RECEIVES  NOTICE THAT THE CHECK HAS CLEARED WHICH MAY BE UP
TO 15 DAYS FROM THE CREDIT OF THE SHARES TO A SHAREHOLDER'S ACCOUNT.
                                                                            5/98



                                       32
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                                       33
<PAGE>


                                    SELIGMAN
                             HIGH-YIELD BOND SERIES







                       SELIGMAN FINANCIAL SERVICES, INC.
                                AN AFFILIATE OF

                                     [LOGO]

                             J. & W. SELIGMAN & CO.
                                  INCORPORATED
                                ESTABLISHED 1864
                      100 PARK AVENUE, NEW YORK, NY 10017


TXHY1 5/98



<PAGE>

                                  STATEMENT OF
                             ADDITIONAL INFORMATION
   
                                   MAY 1, 1998
    
                   SELIGMAN U.S. GOVERNMENT SECURITIES SERIES
                         SELIGMAN HIGH-YIELD BOND SERIES
                                    series of
                        SELIGMAN HIGH INCOME FUND SERIES

                                 100 Park Avenue
                            New York, New York 10017
                     New York City Telephone (212) 850-1864
                       Toll Free Telephone (800) 221-2450
      For Retirement Plan Information - Toll-Free Telephone (800) 445-1777
   
     This Statement of Additional  Information  expands upon and supplements the
information contained in the current Prospectus for each series of Seligman High
Income  Fund  Series  (the  "Fund"),  dated  May 1,  1998.  It should be read in
conjunction with the  Prospectuses,  which may be obtained by writing or calling
the Fund at the above address or telephone numbers. This Statement of Additional
Information,  although not in itself a Prospectus,  is incorporated by reference
into each Prospectus in its entirety.

     The Fund consists of the Seligman U.S. Government  Securities Series ("U.S.
Government   Securities   Series")  and  the  Seligman  High-Yield  Bond  Series
("High-Yield Bond Series") (the "Series").  Each Series of the Fund offers three
classes of shares.  Class A shares may be  purchased  at net asset value plus an
initial  sales  load of up to 4.75%.  Class A shares  purchased  in an amount of
$1,000,000  or more are sold without an initial  sales load but are subject to a
contingent deferred sales load ("CDSL") of 1% (of the current net asset value or
the  original  purchase  price,  whichever  is less) if such shares are redeemed
within eighteen months of purchase. Class B shares may be purchased at net asset
value and are subject to a CDSL, if  applicable,  in the following  amount (as a
percentage  of the  current  net asset  value or the  original  purchase  price,
whichever is less), if redemption occurs within the indicated number of years of
purchase of such shares: 5% (less than 1 year), 4% (1 but less than 2 years), 3%
(2 but less than 4 years),  2% (4 but less than 5 years),  1% (5 but less than 6
years) and 0% (6 or more years). Class B shares automatically convert to class A
shares after approximately eight years,  resulting in lower ongoing fees. Shares
purchased  through  reinvestment of dividends and gain  distributions on Class B
shares  also  will  convert  automatically  to  Class A  shares  along  with the
underlying shares on which they were earned.  Class D shares may be purchased at
net asset  value and are subject to a CDSL of 1% (of the current net asset value
or the original  purchase price,  whichever is less) if redeemed within one year
of purchase.
    
     Each  Series'  Class A, Class B and Class D shares  represent  an identical
legal  interest  in the  investment  portfolio  of such  Series and has the same
rights  except for certain  class  expenses  and except that Class B and Class D
shares bear higher  ongoing fees that generally will cause the Class B and Class
D shares to have  higher  expense  ratios and pay lower  dividends  than Class A
shares.  Each Class has exclusive voting rights with respect to its distribution
plan.  Although  holders of Class A, Class B and Class D shares  have  identical
legal  rights,  the  different  expenses  borne by each  Class  will  result  in
different net asset values and dividends.  The three classes also have different
exchange privileges.

                                TABLE OF CONTENTS
   
                                               PAGE
                                               ----
Investment   Objectives,
Policies and Risks.............................  2
Investment Limitations.........................  3
Trustees and Officers..........................  4
Management and Expenses........................  9
Administration, Shareholder Services
 and Distribution Plans........................ 10
Portfolio Transactions......................... 11
Purchase and Redemption of
   Fund Shares................................. 11
Distribution Services.......................... 14
Valuation...................................... 15
Performance ................................... 15
General Information............................ 18
Financial Statements........................... 20
Appendix ...................................... 21
    
TX1A

                                       -1-
<PAGE>

                    INVESTMENT OBJECTIVES, POLICIES AND RISKS

     The investment objective of each Series is a fundamental policy and may not
be changed by the  Trustees  of the Fund  without the vote of a majority of such
Series'  outstanding  voting  securities.  The  objective  of each  Series is as
follows:

     The U.S. Government Securities Series seeks to produce high current income.
To achieve its  objective,  the Series  invests  primarily  in debt  obligations
issued or guaranteed by the U.S. Government or its agencies or instrumentalities
and  backed by the full  faith  and  credit of the U.S.  Government  which  have
maturities of greater than one year at the date of purchase by the Series.

     The High-Yield  Bond Series seeks to produce  maximum  current  income.  To
achieve its objective, the Series invests primarily in high-yielding,  high-risk
corporate  bonds and notes,  which  generally are unrated or carry lower ratings
(Baa or lower by Moody's Investors Service,  Inc. ("Moody's") or BBB or lower by
Standard & Poor's Rating  Service  ("S&P") than those assigned by S&P or Moody's
to investment grade bonds and notes.  Except for temporary  defensive  purposes,
the Series will invest at least 80% of the value of its assets in high-yielding,
income-producing  corporate  bonds and  notes.  Investments  other  than in such
corporate  bonds  will be in  short-term  money  market  instruments,  including
certificates of deposit,  commercial  paper,  securities  issued,  guaranteed or
insured by the U.S. Government,  its agencies and  instrumentalities,  and other
income  producing cash items. The High-Yield Bond Series may invest up to 10% of
its total assets in debt securities of foreign issuers.  Foreign investments may
be affected  favorably or  unfavorably by changes in currency rates and exchange
control  regulations.  There may be less  information  available about a foreign
company than about a U.S.  company,  and foreign companies may not be subject to
reporting  standards and  requirements  comparable  to those  applicable to U.S.
companies.  Foreign debt  securities  and their  markets may not be as liquid as
U.S.  securities  and their markets.  Securities and some foreign  companies may
involve  greater  market risk than  securities  of U.S.  companies,  and foreign
brokerage  commissions and custody fees are generally  higher than in the United
States.  Investments  in foreign  debt  securities  may also be subject to local
economic or  political  risks,  such as  political  instability  of some foreign
governments and the possibility of nationalization of issuers.

     The following  information regarding the investment policies of each Series
supplements the information contained in each Series' Prospectus.

LENDING OF Securities.  Each Series of the Fund may lend portfolio securities to
certain institutional borrowers of securities and may invest the cash collateral
and obtain  additional  income or receive an agreed upon amount of interest from
the  borrower.  Loans  will  generally  be  short-term.  Loans  are  subject  to
termination  at the option of the Series or the  borrower.  Each  Series may pay
reasonable  administrative  and custodial fees in connection with a loan and may
pay a  negotiated  portion  of the  interest  earned  on the cash or  equivalent
collateral  to the  borrower or placing  broker.  Loaned  securities  may not be
returned by a borrower;  however,  a borrower must maintain with the Series from
which it has borrowed securities,  cash, or equivalent  collateral,  equal to at
least 100% of the market value of the securities borrowed.

REPURCHASE  Agreements.  Each  Series  of the Fund  may  enter  into  repurchase
agreements with commercial banks and with  broker/dealers to invest cash for the
short-term.  A  repurchase  agreement  is an  agreement  under  which the Series
acquires a money  market  instrument,  generally a U.S.  Government  obligation,
qualified for purchase by the Series,  subject to resale at an agreed upon price
and date.  Such resale price reflects an agreed upon interest rate effective for
the period of time the  instrument is held by the Series and is unrelated to the
interest rate on the  instrument.  Repurchase  agreements  usually are for short
periods, such as one week or less, but may be for longer periods. As a matter of
fundamental  policy, a Series will not enter into repurchase  agreements of more
than one week's  duration if more than 10% of its total assets would be invested
in such agreements and in "restricted" and other illiquid securities.

WHEN-ISSUED  Securities.  Each Series may purchase  securities  on a when-issued
basis,  in which case  delivery and payment  normally  take place within 45 days
after the date of the  commitment to purchase.  The payment  obligation  and the
interest rate that will be received on the securities are each fixed at the time
the buyer  enters  into the  commitment.  Although a Series  will only  purchase
securities on a when-issued  basis with the intention of actually  acquiring the
securities,  the Series may sell these securities  before the settlement date if
it is deemed advisable.

     Securities purchased on a when-issued basis and the securities held in each
Series are subject to changes in market value based upon the public's perception
of the creditworthiness of the issuer and changes,  real or anticipated,  in the
level of interest  rates  (which  will  generally  result in similar  changes in
value, i.e., both experiencing appreciation when interest rates


                                       -2-


<PAGE>


decline and depreciation when interest rates rise).  Therefore,  to the extent a
Series  remains  substantially  fully  invested  at the  same  time  that it has
purchased securities on a when-issued basis, there will be a greater possibility
that the  market  value of the  Series'  assets  will vary more than  otherwise.
Purchasing a security on a when-issued  basis can involve a risk that the yields
available in the market when the  delivery  takes place may be higher than those
obtained on the security so purchased.

     A  separate  account  of each of the  Series  consisting  of cash or liquid
high-grade  debt securities  equal to the amount of the when-issued  commitments
will be established with Investors Fiduciary Trust Company, the Fund's portfolio
securities custodian, and marked to market daily, with additional cash or liquid
high grade debt securities added when necessary.  When the time comes to pay for
when-issued  securities,  each Series will meet its respective  obligations from
then available cash flow, sale of securities held in the separate account,  sale
of other  securities or,  although they would not normally expect to do so, from
the  sale of the  when-issued  securities  themselves  (which  may  have a value
greater or less than the Series'  payment  obligations).  Sale of  securities to
meet such obligations carries with it a greater potential for the realization of
capital gain or loss.

     Except as  described  above and under  Investment  Limitations  below,  the
foregoing  investment  policies are not fundamental and the Trustees of the Fund
may change  such  policies  without  the vote of a majority  of the  outstanding
voting securities of the Fund or any Series (as defined on page 4).
   
PORTFOLIO  TURNOVER.  Each Series'  portfolio  turnover  rate is  calculated  by
dividing the lesser of purchases or sales of portfolio  securities of the Series
for the fiscal year by the monthly average value of the portfolio  securities of
the Series  owned  during the fiscal  year.  High  portfolio  turnover  involves
correspondingly greater transactions costs and a possible increase in short-term
capital gains or losses.  Securities whose maturities or expiration dates at the
time of acquisition were one year or less are excluded from the calculation. The
portfolio  turnover  rates for the U.S.  Government  Securities  Series  and the
High-Yield  Bond  Series for the years  ended  December  31,  1997 and 1996 were
193.90%  and  175.25%  and 61.78% and  119.33%,  respectively.  The  decrease in
portfolio turnover was due to the increase in the size of the Series.
    
                             INVESTMENT LIMITATIONS

     Under each Series' fundamental policies,  which cannot be changed except by
a vote of a majority of its outstanding voting securities, a Series may not:

- -  Borrow money,  except from banks for temporary or emergency purposes (but not
   for the purchase of portfolio  securities)  in an amount not to exceed 15% of
   the  value of the total  assets of the  Series.  A Series  will not  purchase
   additional portfolio securities if such Series has outstanding  borrowings in
   excess of 5% of the value of its total assets;

- -  Mortgage  or pledge  any of its  assets,  except to the extent  necessary  to
   effect borrowings permitted by the preceding paragraph and provided that this
   limitation  does not prohibit  escrow,  collateral or margin  arrangements in
   connection  with  (a)  the  writing  of  covered  call  options  by the  U.S.
   Government  Securities  Series;  (b) the  purchase of put options by the U.S.
   Government  Securities  Series  or (c) the  sale  of  interest  rate  futures
   contracts  and the purchase or sale of options on such  contracts by the U.S.
   Government Securities Series;

- -  Make "short" sales of securities,  or purchase  securities on "margin" except
   that for  purposes  of this  limitation,  initial and  variation  payments or
   deposits in  connection  with  interest  rate futures  contracts  and related
   options by the U.S. Government Securities Series will not be deemed to be the
   purchase  of  securities  on margin;  write or purchase  put or call  options
   except that the U.S.  Government  Securities  Series may write  covered  call
   options and the U.S.  Government  Securities  Series may purchase put options
   and may purchase and sell options on interest  rate futures and may engage in
   closing  transactions with respect to such options. The Series has no present
   intention  of  investing  in these  types of  securities,  and will not do so
   without the prior approval of the Fund's Board of Trustees;

- -  Purchase  securities of any issuer if immediately  thereafter more than 5% of
   total assets at market would be invested in the securities of any one issuer,
   other than the U.S. Government,  its agencies or instrumentalities;  buy more
   than  10% of the  voting  securities  of any  one  issuer,  other  than  U.S.
   Government agencies or instrumentalities;  or invest to control or manage any
   company;

- -  Invest more than 25% of the market value of its total assets in securities of
   issuers  in  any  one   industry;   for  the  purpose  of  this   limitation,
   mortgage-related securities do not constitute an industry;


                                      -3-


<PAGE>


- -  Invest  in  securities  issued  by  other  investment  companies,  except  in
   connection with a merger, consolidation, acquisition or reorganization;*

- -  Purchase or hold any real estate including limited  partnership  interests in
   real property;

- -  Purchase or sell commodities and commodity  futures contracts except that the
   U.S.  Government  Securities  Series may sell interest rate futures contracts
   and may write call  options and may purchase put options with respect to such
   contracts  and may engage in closing  transactions  with  respect to all such
   transactions. The Series has no present intention of investing in these types
   of  securities,  and will not do so without the prior  approval of the Fund's
   Board of Trustees;

- -  Invest more than 5% of the value of its total  assets,  at market  value,  in
   securities of any company which, with its predecessors, has been in operation
   less  than  three  continuous  years,  provided,   however,  that  securities
   guaranteed by a company that (including  predecessors)  has been in operation
   at least three continuous years shall be excluded from this calculation;

- -  Purchase or hold the securities of any issuer, if to its knowledge,  Trustees
   or officers of the Fund  individually  owning  beneficially more than 0.5% of
   the  securities of that other  company own in the  aggregate  more than 5% of
   such securities;

- -  Engage in  transactions  with its  Trustees and  officers,  or firms they are
   associated  with,  in  connection  with the  purchase or sale of  securities,
   except as broker;

- -  Underwrite the securities of other  issuers,  except that in connection  with
   the  disposition of a security a Series may be deemed to be an underwriter as
   defined in the Securities Act of 1933; or

- -  Make loans, except loans of securities of the Series and except to the extent
   the purchase of notes, bonds or other evidences of indebtedness, or the entry
   into repurchase agreements may be considered loans.

   Under the  Investment  Company  Act of 1940 (the  "1940  Act"),  a "vote of a
majority of the  outstanding  voting  securities" of the Fund or of a particular
Series  means  the  affirmative  vote of the  lesser of (l) more than 50% of the
outstanding  shares  of the  Fund  or of such  Series  or (2) 67% or more of the
shares of the Fund or of such Series present at a shareholder's  meeting if more
than 50% of the outstanding shares of the Fund or of such Series are represented
at the meeting in person or by proxy.

                              TRUSTEES AND OFFICERS

     Trustees and officers of the Fund,  together with  information  as to their
principal business occupations during the past five years, are shown below. Each
Trustee who is an  "interested  person" of the Fund, as defined in the 1940 Act,
is indicated by an asterisk. Unless otherwise indicated, their addresses are 100
Park Avenue, New York, NY 10017.

   
- --------
* The Fund has applied for and received an exemptive  order from the  Securities
and  Exchange  Commission  that  would  permit  it to  purchase  shares of other
investment  companies  advised by the Manager for the limited purpose of hedging
its  obligations  in connection  with the deferred fee  arrangement  for outside
directors referred to under "Trustees and Officers" below.
    

                                      -4-


<PAGE>

   
WILLIAM C.  MORRIS*    Trustee,  Chairman of the Board,  Chief Executive Officer
 (60)                  and  Chairman of the Executive Committee

                       Chairman, J. & W. Seligman & Co. Incorporated, investment
                       managers  and  advisers;  Chairman  and  Chief  Executive
                       Officer,  the  Seligman  Group of  Investment  Companies;
                       Chairman,     Seligman    Financial    Services,    Inc.,
                       broker/dealer;  Seligman Services,  Inc.,  broker/dealer;
                       and Carbo  Ceramics Inc.,  ceramic  proppants for oil and
                       gas industry;  Director, Seligman Data Corp., shareholder
                       service agent; Kerr-McGee Corporation, diversified energy
                       company;  and Sarah Lawrence College; and a Member of the
                       Board of Governors of the Investment  Company  Institute;
                       formerly, President, J. & W. Seligman & Co. Incorporated,
                       Chairman,  Seligman Advisors,  Inc.,  advisers;  Seligman
                       Holdings,  Inc.,  holding company;  Seligman  Securities,
                       Inc.,  broker/dealer  and J. & W. Seligman Trust Company,
                       trust company;  and Director,  Daniel  Industries,  Inc.,
                       manufacturer of oil and gas metering equipment.

BRIAN T. ZINO*         Trustee, President and Member of the Executive  Committee
 (45)   
                       Director  and   President,   J.  &  W.   Seligman  &  Co.
                       Incorporated, investment managers and advisers; President
                       (with the exception of Seligman  Quality  Municipal Fund,
                       Inc.  and  Seligman  Select  Municipal  Fund,  Inc.)  and
                       Director  or  Trustee,   the  Seligman  Group  Investment
                       Companies;  Chairman,  Seligman  Data Corp.,  shareholder
                       service agent; and Director, Seligman Financial Services,
                       Inc.,    broker/dealer;    Seligman    Services,    Inc.,
                       broker/dealer;  and  Seligman  Henderson  Co.,  advisers;
                       formerly,  Director,  Seligman Advisors,  Inc., advisers;
                       Seligman  Securities,  Inc.,  broker/dealer  and  J. & W.
                       Seligman Trust Company, trust company.

RICHARD R. SCHMALTZ*   Trustee  and  Member  of  the  Executive  Committee 
 (57)
                       Director and Managing Director,  Director of Investments,
                       J. & W. Seligman & Co. Incorporated; Director of Seligman
                       Henderson  Co. and  Trustee  Emeritus  of Colby  College;
                       formerly,  Director,  Investment  Research at Neuberger &
                       Berman from May 1993 to September 1996 and Executive Vice
                       President of McGlinn Capital from July 1987 to May 1993.

JOHN R. GALVIN         Trustee 
 (68)
                       Dean,  Fletcher  School  of Law and  Diplomacy  at  Tufts
                       University;  Director or Trustee,  the Seligman  Group of
                       Investment  Companies;   Chairman,  American  Council  on
                       Germany;   a  Governor   of  the   Center  for   Creative
                       Leadership;  National Committee on U.S.-China  Relations;
                       National  Defense  University;  the Institute for Defense
                       Analysis;   and  Raytheon  Co.,  electronics;   formerly,
                       Director, USLIFE Corporation, life insurance; Ambassador,
                       U.S.  State   Department  for   negotiations  in  Bosnia;
                       Distinguished Policy Analyst at Ohio State University and
                       Olin Distinguished Professor of National Security Studies
                       at the United States Military Academy. From June, 1987 to
                       June, 1992, he was the Supreme Allied  Commander,  Europe
                       and  the   Commander-in-Chief,   United  States  European
                       Command.
                       Tufts University, Packard Avenue, Medford, MA 02105.

ALICE S. ILCHMAN       Trustee
(63)
                       President,  Sarah Lawrence College;  Director or Trustee,
                       the Seligman Group of Investment Companies; the Committee
                       for  Economic  Development;   Chairman,  The  Rockefeller
                       Foundation, charitable foundation; formerly, Trustee, The
                       Markle  Foundation,   philanthropic   organization;   and
                       Director,  NYNEX,  telephone  company;  and International
                       Research and Exchange Board, intellectual exchanges.
                       Sarah Lawrence College, Bronxville, NY 10708
    

                                       -5-
<PAGE>

   
FRANK A. McPHERSON     Trustee 
(65) 
                       Director, various corporations;  Director or Trustee, the
                       Seligman  Group of Investment  Companies;  Kimberly-Clark
                       Corporation,  consumer products; Bank of Oklahoma Holding
                       Company;  Baptist Medical Center; Oklahoma Chapter of the
                       Nature Conservancy; Oklahoma Medical Research Foundation;
                       and National Boys and Girls Clubs of America;  and Member
                       of  the  Business   Roundtable  and  National   Petroleum
                       Council;  formerly,  Chairman  of  the  Board  and  Chief
                       Executive Officer,  Kerr-McGee  Corporation,  diversified
                       energy  company;  Chairman,  Oklahoma City Public Schools
                       Foundation; and Director, Federal Reserve System's Kansas
                       City  Reserve  Bank;  and the  Oklahoma  City  Chamber of
                       Commerce. 123  Robert S. Kerr  Avenue, Oklahoma  City, OK
                       73102

JOHN E. MEROW          Trustee
 (68)
                       Retired Chairman and Senior Partner, Sullivan & Cromwell,
                       law firm;  Director or  Trustee,  the  Seligman  Group of
                       Investment  Companies;   Commonwealth  Industries,  Inc.,
                       manufacturer  of  aluminum  sheet  products;  the Foreign
                       Policy  Association;  Municipal  Art Society of New York;
                       U.S. Council for International Business; and The New York
                       and Presbyterian Hospital;  Chairman, American Australian
                       Association;  and The New York and Presbyterian  Hospital
                       Care  Network,  Inc.;  Vice-Chairman,   U.S.-New  Zealand
                       Council; Member of the American Law Institute and Council
                       on Foreign Relations.
                       125 Broad Street, New York, NY 10004

BETSY S. MICHEL        Trustee
 (55)
                       Attorney;  Director or  Trustee,  the  Seligman  Group of
                       Investment  Companies;  Trustee,  The  Geraldine R. Dodge
                       Foundation,  charitable  foundation;  and Chairman of the
                       Board of Trustees of St. George's School  (Newport,  RI);
                       formerly,   Director,   The   National   Association   of
                       Independent Schools (Washington, DC).
                       St. Bernard's Road, P.O. Box 449, Gladstone, NJ 07934

JAMES C. PITNEY        Trustee
(71)
                       Retired Partner,  Pitney, Hardin, Kipp & Szuch, law firm;
                       Director or Trustee,  the  Seligman  Group of  Investment
                       Companies;  and  Director,  Public  Broadcasting  Service
                       (PBS);  formerly,  Director,  Public  Service  Enterprise
                       Group, public utility.
                       Park Avenue at Morris County,  P.O. Box 1945, Morristown,
                       NJ 07962-1945

JAMES Q. RIORDAN       Trustee
 (70)
                       Director, Various Corporations;  Director or Trustee, the
                       Seligman  Group  of  Investment  Companies;  The  Houston
                       Exploration  Company;  The Brooklyn Museum;  The Brooklyn
                       Union   Gas   Company;   The   Committee   for   Economic
                       Development;   and  Public  Broadcasting  Service  (PBS);
                       formerly,  Co-Chairman  of the Policy  Council of the Tax
                       Foundation;    Director   and   Vice   Chairman,    Mobil
                       Corporation;  Director, Tesoro Petroleum Companies, Inc.;
                       Dow Jones & Co., Inc. and Director and President, Bekaert
                       Corporation.
                       675 Third Avenue, Suite 3004, New York, NY 10017

ROBERT L. SHAFER       Trustee 
 (65)
                       Director, various corporations;  Director or Trustee, the
                       Seligman Group of Investment  Companies;  formerly,  Vice
                       President,   Pfizer,  Inc.,  pharmaceuticals;   Director,
                       USLIFE Corporation, life insurance.
                       235 East 42nd Street, New York, NY 10017
    
                                      -6-


<PAGE>

   
JAMES N. WHITSON       Trustee
 (63)
                       Director, Sammons Enterprises, Inc.; Director or Trustee,
                       the Seligman Group of Investment  Companies;  C-SPAN; and
                       CommScope,   Inc.,   manufacturer   of  coaxial   cables;
                       formerly,  Executive Vice  President and Chief  Operating
                       Officer,  Sammons Enterprises,  Inc.;  Director,  Red Man
                       Pipe and Supply Company, piping and other materials.
                       5949 Sherry Lane, Suite 1900, Dallas, TX 75225

DANIEL  J. CHARLESTON  Vice President and Portfolio Manager
 (38)
                       Vice  President,   Investment   Officer  and  a  Managing
                       Director  of  J.  &  W.  Seligman  &  Co.   Incorporated,
                       investment managers and advisers;  and Vice President and
                       Portfolio  Manager  of  one  other  open-end   investment
                       company in the Seligman Group of Investment Companies.

LEONARD J. LOVITO      Vice President and Portfolio Manager
 (38)
                       Vice President,  Investment  Officer,  J. & W. Seligman &
                       Co. Incorporated,  investment managers and advisers; Vice
                       President  and  Portfolio  Manager,  two  other  open-end
                       investment  companies in the Seligman Group of Investment
                       Companies.

LAWRENCE P. VOGEL      Vice President 
 (41)
                       Senior Vice  President,  Finance,  J. & W. Seligman & Co.
                       Incorporated,  investment managers and advisers; Seligman
                       Financial  Services,  Inc.,  broker/dealer;  and Seligman
                       Data Corp.,  shareholder  service agent;  Vice President,
                       the Seligman  Group of Investment  Companies and Seligman
                       Services, Inc.,  broker/dealer;  and Treasurer,  Seligman
                       Henderson Co., advisers; formerly, Senior Vice President,
                       Seligman  Advisors,   Inc.,   advisers;   and  Treasurer,
                       Seligman Holdings, Inc., holding company.

FRANK J. NASTA         Secretary
 (33)
                       Senior Vice  President,  Law and Regulation and Corporate
                       Secretary,   J.  &  W.   Seligman  &  Co.   Incorporated,
                       investment managers and advisers; Secretary, the Seligman
                       Group  of  Investment   Companies;   Seligman   Financial
                       Services,  Inc.,  broker/dealer;  Seligman Henderson Co.,
                       advisers;  Seligman Services,  Inc.,  broker/dealer;  and
                       Seligman Data Corp., shareholder service agent; formerly,
                       Senior Vice  President,  Law and Regulation and Corporate
                       Secretary,  Seligman  Advisors,  Inc.,  advisers;  and an
                       attorney at Seward and Kissel, law firm.

THOMAS G. ROSE         Treasurer
 (40)
                       Treasurer,  the Seligman  Group of Investment  Companies;
                       and Seligman Data Corp., shareholder service agent.
    
     The  Executive  Committee  of the  Trustees  acts on behalf of the Trustees
between  meetings to determine the value of  securities  and assets owned by the
Fund for which no market valuation is available and to elect or appoint officers
of the Fund to serve until the next meeting of the Trustees.


                                      -7-
<PAGE>


                               COMPENSATION TABLE

<TABLE>
<CAPTION>
   
                                                                            PENSION OR
                                                  AGGREGATE            RETIREMENT BENEFITS         TOTAL COMPENSATION
                                                COMPENSATION            ACCRUED AS PART OF            FROM FUND AND
   POSITION  WITH REGISTRANT                    FROM FUND (1)             FUND EXPENSES              FUND COMPLEX (1)(2)
   -------------------------                    ------------            -----------------           --------------------
<S>                                               <C>                        <C>                      <C>    
William C. Morris, Trustee and Chairman             N/A                      N/A                          N/A
Brian T. Zino, Trustee and President                N/A                      N/A                          N/A
Richard R. Schmaltz, Trustee                        N/A                      N/A                          N/A
Fred E. Brown, Trustee Emeritus**                   N/A                      N/A                          N/A
John R. Galvin, Trustee                           $2,877.11                  N/A                      $69,000.00
Alice S. Ilchman, Trustee                          2,777.55                  N/A                       65,000.00
Frank A. McPherson, Trustee                        2,813.27                  N/A                       66,000.00
John E. Merow, Trustee                             2,777.57                  N/A                       65,000.00
Betsy S. Michel, Trustee                           2,877.11                  N/A                       69,000.00
James C. Pitney, Trustee                           2,756.28                  N/A                       64,000.00
James Q. Riordan, Trustee                          2,834.55                  N/A                       67,000.00
Robert L. Schafer, Trustee                         2,834.55                  N/A                       67,000.00
James N. Whitson, Trustee                          2,855.83(d)               N/A                       68,000.00(d)
</TABLE>


- ----------
(1)  Based on  remuneration  received  by the  Trustees of the Fund for the year
     ended  December 31, 1997.  Effective  January 16, 1998, the per meeting fee
     for Directors was increased by $1,000,  which is allocated  among all Funds
     in the Fund Complex.
    
(2)  As defined in each Series'  Prospectus,  the Seligman  Group of  Investment
     Companies consists of eighteen investment companies.
   
**   Retired as Trustee and designated Trustee Emeritus on March 20, 1997.
    

(d)  Deferred.
   
     The Fund has a compensation  arrangement  under which outside  Trustees may
elect to defer receiving their fees. Under this  arrangement,  interest would be
accrued on the deferred  balances.  The actual cost of such interest is included
in the  Trustee's  fees and expenses,  and the  accumulated  balance  thereof is
included in "Liabilities" in the Fund's financial statements. As of December 31,
1997, the total amount of deferred compensation  (including interest) payable in
respect of the Fund to Mr.  Whitson  was  $14,086.  Messrs.  Merow and Pitney no
longer  defer  current   compensation;   however,  they  have  accrued  deferred
compensation in the amounts of $35,986 and $25,797, respectively, as of December
31,  1997.  The Fund has applied for and  received  exemptive  relief that would
permit a director  who has elected  deferral of his or her fees to choose a rate
of return equal to either (i) the interest rate on short-term Treasury bills, or
(ii) the rate of return on the shares of any of the investment companies advised
by the  Manager,  as  designated  by the  director.  The  Fund  may,  but is not
obligated  to,  purchase  shares  of such  investment  companies  to  hedge  its
obligations in connection with this deferral arrangement.

     Trustees and officers of the Fund are also directors, trustees and officers
of some or all of the other investment companies in the Seligman Group. Trustees
and  officers  of the  Fund as a group  owned  less  than  1% of both  the  U.S.
Government  Securities  Series' and the High-Yield  Bond Series' Class A capital
stock as of March 31,  1998.  As of that date,  no Trustees  or  officers  owned
shares of either Series' Class B or Class D capital stock.

     As of March 31,  1998,  19,107,682  Class A shares of the  High-Yield  Bond
Series,  which equaled 6.31% of the  High-Yield  Bond Series'  capital stock and
16.41% of the  High-Yield  Bond Series' Class A capital stock then  outstanding;
31,460,652 Class B shares of the High-Yield Bond Series, which equaled 10.38% of
the  High-Yield  Bond Series'  capital stock and 32.75% of the  High-Yield  Bond
Series' Class B capital stock then outstanding; and 32,369,129 Class D shares of
the High-Yield Bond Series,  which equaled 10.68% of the High-Yield Bond Series'
capital  stock and 39.48% of the  High-
    
                                      -8-


<PAGE>


Yield Bond Series' Class D capital stock then outstanding,  were owned of record
by MLPF&S For the Sole Benefit of Its Customers,  4800 Deer Lake Drive East, 3rd
Floor, Jacksonville, FL 32246.

                             MANAGEMENT AND EXPENSES

     Under each Series'  Management  Agreement,  dated December 29, 1988 for the
U.S.  Government  Securities Series and December 29, 1988, as amended January 1,
1996, for the High-Yield Bond Series, subject to the control of the Trustees, J.
& W. Seligman & Co.  Incorporated (the "Manager")  manages the investment of the
assets  of each  Series,  including  making  purchases  and  sales of  portfolio
securities consistent with each Series' investment objectives and policies,  and
administers the business and other affairs of each Series.  The Manager provides
the Fund with such office space, administrative and other services and executive
and other personnel as are necessary for Fund  operations.  The Manager pays all
of the  compensation of Trustees of the Fund who are employees or consultants of
the  Manager and the  officers  and  employees  of the Fund.  The  Manager  also
provides  senior  management  for Seligman  Data Corp.,  the Fund's  shareholder
service agent.
   
     The Manager is entitled  to receive a  management  fee from each Series for
its services to such Series,  calculated daily and payable monthly. For the U.S.
Government  Securities Series, the fee is equal to .50% of the average daily net
assets of the Series on an annual basis.  The  management fee for the High-Yield
Bond  Series is equal to .65% of the  Series'  average  daily net  assets on the
first $1 billion of net assets and .55% of the Series'  average daily net assets
in excess of $1 billion.  The management fees paid by the U.S. Government Series
for each of the years 1997,  1996 and 1995 equaled .50% of the average daily net
assets of such Series,  or $271,995,  $290,879 and $301,343,  respectively.  The
management  fees paid by the  High-Yield  Bond  Series  for 1997,  1996 and 1995
equaled .62%, .65%, and .50%,  respectively,  of the average daily net assets of
such Series or $8,248,354, $3,107,117 and $723,340, respectively.
    
     The Fund pays all its  expenses  other  than those  assumed by the  Manager
including  brokerage  commissions,  administration,   shareholder  services  and
distribution  fees,  if any,  fees and  expenses of  independent  attorneys  and
auditors,  taxes and governmental fees including fees and expenses of qualifying
the Fund and its shares under federal and state  securities  laws, cost of stock
certificates  and expenses of repurchase  or  redemption of shares,  expenses of
printing and distributing reports,  notices and proxy materials and prospectuses
to existing  shareholders,  expenses of  printing  and filing  reports and other
documents filed with governmental agencies,  expenses of shareholders' meetings,
expenses  of  corporate  data  processing  and  related  services,   shareholder
recordkeeping  and  shareholder  account  services,  fees and  disbursements  of
transfer   agents  and   custodians,   expenses  of  disbursing   dividends  and
distributions,  fees payable under the Administration,  Shareholder Services and
Distribution Plan described below, fees and expenses of Trustees of the Fund not
employed  by (or  serving  as a  Trustee  of)  the  Manager  or its  affiliates,
insurance premiums and extraordinary  expenses such as litigation expenses.  The
Fund's  expenses are  allocated  among the Series in a manner  determined by the
Trustees to be fair and equitable.

     Each Series'  Management  Agreement was initially  approved by the Board of
Trustees on September 30, 1988 and by the shareholders at a special meeting held
on  December  16,  1988.  The  amendments  to the  Management  Agreement  of the
High-Yield  Bond Series,  to increase the fee rate payable to the Manager by the
Series,  were approved by the Board of Trustees on September 21, 1995 and by the
shareholders  at a special  meeting held on December 12,  1995.  The  Management
Agreements will continue until December 31 of each year (1) if such  continuance
is approved  in the manner  required by the 1940 Act (by a vote of a majority of
the Trustees or of the  outstanding  voting  securities  of each Series and by a
vote  of a  majority  of the  Trustees  who are not  parties  to the  Management
Agreement or interested  persons of any such party) and (2) if the Manager shall
not have  notified  a Series at least 60 days prior to  December  31 of any year
that it does not desire  such  continuance.  Each  Management  Agreement  may be
terminated  by the  appropriate  Series,  without  penalty,  on 60 days' written
notice  to the  Manager  and will  terminate  automatically  in the event of its
assignment.  Each Series has agreed to change its name upon  termination  of its
Management  Agreement if continued use of the name would cause  confusion in the
context of the Manager's business.

     The Manager is a successor firm to an investment  banking  business founded
in 1864  which has  thereafter  provided  investment  services  to  individuals,
families, institutions and corporations. On December 29, 1988, a majority of the
outstanding  voting  securities of the Manager was  purchased by Mr.  William C.
Morris and a  simultaneous  recapitalization  of the Manager  occurred.  See the
Appendix for further history of the Manager.

                                      -9-


<PAGE>

   
     Officers, directors and employees of the Manager are permitted to engage in
personal securities  transactions,  subject to the Manager's Code of Ethics (the
"Ethics  Code").  The Ethics Code  proscribes  certain  practices with regard to
personal securities transactions and personal dealings, provides a framework for
the  reporting  and  monitoring  of  personal  securities  transactions  by  the
Manager's  Compliance  Officer,  and sets forth a procedure of identifying,  for
disciplinary  action,  those individuals who violate the Ethics Code. The Ethics
Code  prohibits  each of the officers,  directors and employees  (including  all
portfolio  managers) of the Manager from purchasing or selling any security that
the officer,  director or employee knows or believes (i) was  recommended by the
Manager  for  purchase  or sale by any client,  including  the Fund,  within the
preceding two weeks, (ii) has been reviewed by the Manager for possible purchase
or sale within the preceding two weeks,  (iii) is being purchased or sold by any
client, (iv) is being considered by a research analyst, (v) is being acquired in
a private placement,  unless prior approval has been obtained from the Manager's
Compliance  Officer,  or (vi) is being  acquired  during an initial or secondary
public   offering.   The  Ethics  Code  also   imposes  a  strict   standard  of
confidentiality  and requires  portfolio  managers to disclose any interest they
may have in the  securities  or issuers that they  recommend for purchase by any
client.
    
     The Ethics Code also prohibits (i) each  portfolio  manager or member of an
investment  team from  purchasing or selling any security  within seven calendar
days of the  purchase or sale of the security by a client's  account  (including
investment  company accounts) for which the portfolio manager or investment team
manages and (ii) each employee  from engaging in short-term  trading (a purchase
and sale or vice-versa  within 60 days). Any profit realized  pursuant to either
of these prohibitions must be disgorged.

     Officers,  directors and employees are required,  except under very limited
circumstances,  to  engage  in  personal  securities  transactions  through  the
Manager's order desk. The order desk maintains a list of securities that may not
be purchased due to a possible  conflict with clients.  All officers,  directors
and employees are also required to disclose all securities beneficially owned by
them on December 31 of each year.

           ADMINISTRATION, SHAREHOLDER SERVICES AND DISTRIBUTION PLANS

     Each Series of the Fund has adopted an Administration, Shareholder Services
and  Distribution  Plan for each Class (the "Plan")  under  Section 12(b) of the
1940 Act and Rule 12b-1 thereunder.

     The Plan was  originally  approved  with respect to each Series on April 8,
1986 by the Board of Trustees of the Fund,  including a majority of the Trustees
who are not  "interested  persons"  (as defined in the 1940 Act) of the Fund and
who had no direct or indirect financial interest in the operation of the Plan or
in any  agreement  related  to the Plan (the  "Qualified  Trustees")  and by the
shareholders  of each Series at a meeting of shareholders on April 10, 1986. The
Plan was  approved  in respect of the Class D shares of both  Series on July 15,
1993 by the Board of Trustees of the Fund, including a majority of the Qualified
Trustees,  and became  effective in respect of the Class D shares of both Series
on September 21, 1993. The Plan was approved in respect of the Class B shares of
the  High-Yield  Bond  Series on March 21,  1996 by the Board of Trustees of the
Fund,  including a majority of the Qualified  Trustees,  and became effective in
respect of the Class B shares of the  High-Yield  Bond Series on April 22, 1996.
The Plan was  approved  in respect of the Class B shares of the U.S.  Government
Securities  Series on  September  19, 1996 by the Board of Trustees of the Fund,
including a majority of the Qualified Trustees,  and became effective in respect
of the Class B shares of the U.S.  Government  Securities  Series on  January 1,
1997.  The Plans will continue in effect until  December 31 of each year so long
as such continuance is approved annually by a majority vote of both the Trustees
and the Qualified  Trustees of the Fund,  cast in person at a meeting called for
the purpose of voting on such approval.  The Plan may not be amended to increase
materially  the  amounts  payable to Service  Organizations  (as defined in each
Series'  Prospectus)  with respect to a class without the approval of a majority
of the  outstanding  voting  securities of such class.  If the amount payable in
respect  of  Class  A  shares  under  the  Plans  is  proposed  to be  increased
materially, the Fund will either (i) permit holders of Class B shares to vote as
a separate  class on the  proposed  increase  or (ii)  establish  a new class of
shares  subject to the same payment under the Plans as existing  Class A shares,
in which  case the Class B shares  will  thereafter  convert  into the new class
instead of into Class A shares.  No material  amendment to the Plans may be made
except by a majority of both the Trustees and Qualified Trustees.
   
     For the year ended December 31, 1997,  Seligman Financial  Services,  Inc.,
("SFSI"),  an  affiliate  of the Manager,  received  payments  under the Plan in
respect  of Class A shares  of the U.S.  Government  Securities  Series  and the
High-Yield Bond Series of $97,552 and $1,399,223,  or 0.22% and 0.24% per annum,
respectively,  of the average  daily net assets of each Series'  Class A shares.
This amount was used  primarily  to pay Service  Organizations  on a  continuing
basis  for  providing   personal  services  and/or  maintenance  of  shareholder
accounts.  For the year ended  December  31,  1997,  fees
    
                                      -10-


<PAGE>

   
incurred by the U.S. Government Securities Series and the High-Yield Bond Series
in respect of each  Series'  Class B shares  amounted to $9,412 and  $3,531,268,
respectively, or 1.00% per annum of the average daily net assets of each Series'
Class B shares.  Of this  amount,  0.725%  per annum  was paid  directly  to FEP
Capital,  L.P.  ("FEP") to compensate it for having funded,  at the time of sale
(i) the 4%  commission  paid to selling  brokers  and (ii) a payment of 0.25% of
Class B sales to SFSI;  0.025%  per  annum was paid to SFSI;  and the  remaining
0.25%  per annum  was paid to SFSI  which,  in turn,  made an equal  payment  to
Service  Organizations  for providing  personal  services and/or  maintenance of
shareholder  accounts.  For the year ended  December 31, 1997,  fees incurred in
respect of Class D shares of the U.S.  Government Series and the High-Yield Bond
Series amounted to $90,486 and $3,979,998,  respectively,  or 1.00% per annum of
the average  daily net assets of each  Series'  Class D shares.  This amount was
paid to SFSI  and,  in the  first  twelve  months  after a sale,  reimbursed  it
primarily for the 1% payment made to dealers at the time of sale and for certain
other direct  distribution  costs.  After the first twelve months,  fees paid to
SFSI are used to pay a continuing fee to Service Organizations.
    

     The Plans  require  that the  Treasurer  of the Fund  shall  provide to the
Trustees, and the Trustees shall review, at least quarterly, a written report of
the amounts  expended (and  purposes  therefor) for each Series under the Plans.
Rule 12b-1 also requires  that the selection and  nomination of Trustees who are
not "interested persons" of the Fund be made by such disinterested Trustees.

                             PORTFOLIO TRANSACTIONS
   
     No brokerage  commissions were paid by the Fund during 1997, 1996 and 1995.
When two or more of the  investment  companies  in the  Seligman  Group or other
investment  advisory  clients  of the  Manager  desire  to buy or sell  the same
security at the same time, the securities purchased or sold are allocated by the
Manager in a manner  believed  to be  equitable  to each.  There may be possible
advantages or  disadvantages of such  transactions  with respect to price or the
size of positions readily obtainable or saleable.
    
                     PURCHASE AND REDEMPTION OF FUND SHARES

     Each Series offers three classes of shares. Class A shares may be purchased
at a price  equal to the next  determined  net asset  value per  share,  plus an
initial  sales load.  Class A shares  purchased  at net asset  value  without an
initial sales load due to the size of the purchase are subject to a CDSL if such
shares are redeemed within  eighteen  months of purchase.  Class B shares may be
purchased  at a price equal to the next  determined  net asset value  without an
initial sales load, but a CDSL may be charged on  redemptions  within 6 years of
purchase.  Class  D  shares  may be  purchased  at a  price  equal  to the  next
determined  net asset value  without an initial  sales  load,  but a CDSL may be
charged  on  redemptions   within  one  year  of  purchase.   See   "Alternative
Distribution  System,"  "Purchase  of  Shares"  and  "Redemption  of  Shares" as
applicable, in each Series' Prospectus.

SPECIMEN PRICE MAKE-UP
   
     Under  the  current  distribution  arrangements  between  the  Fund and the
Distributor,  Class A shares are sold at a maximum sales load of 4.75% and Class
B and Class D shares are sold at net asset  value.* Using the net asset value at
December 31, 1997 for each class of the Series,  the maximum  offering  price of
each Series' shares is as follows:
    

                        U.S. GOVERNMENT SECURITIES SERIES
   
     CLASS A

     Net asset value per share .....................................  $6.88

     Maximum sales load (4.75% of offering price). .................   0.34
                                                                      -----
     Maximum offering price per share ..............................  $7.22
                                                                      =====

     CLASS B AND CLASS D

     Net asset value and maximum offering prices per share* ........  $6.89
                                                                      =====
    
                                      -11-


<PAGE>


                             HIGH-YIELD BOND SERIES
   
     CLASS A

     Net asset value per share ...................................    $7.55

     Maximum sales load (4.75% of offering price) ................     0.38
                                                                      -----
     Maximum offering price per share ............................    $7.93
                                                                      =====
     CLASS B AND CLASS D

     Net asset value and maximum offering prices per share* ......    $7.55
                                                                      =====
    
- ----------
*    Class B shares are  subject to a CDSL  declining  from 5% in the first year
     after purchase to 0% after six years.
     Class D shares are subject to a CDSL of 1% on  redemptions  within one year
     of purchase. See "Redemption of Shares" in each Series' Prospectus.

                  CLASS A SHARES - REDUCED INITIAL SALES LOADS

REDUCTIONS  AVAILABLE.  Shares of any Seligman  Mutual Fund sold with an initial
sales  load  in a  continuous  offering  will  be  eligible  for  the  following
reductions:

     VOLUME DISCOUNTS are provided if the total amount being invested in Class A
shares of a Series or in any  combination of shares of the other Seligman Mutual
Funds which are sold with an initial sales load, reaches levels indicated in the
sales load schedule set forth in each Series' Prospectus.
   
     THE RIGHT OF  ACCUMULATION  allows an investor to combine the amount  being
invested  in Class A shares of any  Seligman  Mutual  Fund sold with an  initial
sales load with the total net asset value of shares already owned that were sold
with an initial sales load,  including  shares of Seligman Cash  Management Fund
that were  acquired  by the  investor  through an  exchange of shares of another
Seligman  Mutual Fund on which there was an initial  sales  load,  to  determine
reduced sales loads in accordance with the schedule in each Series'  Prospectus.
The value of the shares  owned,  including  the value of shares of Seligman Cash
Management  Fund  acquired in an exchange of shares of another  Seligman  Mutual
Fund on which there is an initial  sales load at the time of  purchase,  will be
taken into account in orders placed through a dealer,  however,  only if SFSI is
notified by an investor or a dealer of the amount  owned by the  investor at the
time the  purchase is made and is  furnished  sufficient  information  to permit
confirmation.
    

     A LETTER  OF INTENT  allows an  investor  to  purchase  Class A shares of a
Series'  shares  over a  13-month  period  at  reduced  initial  sales  loads in
accordance with the sales load schedule in each Series' Prospectus, based on the
total amount of Class A shares of the Series that the letter states the investor
intends to purchase plus the total net asset value of shares that were sold with
an initial sales load of the other  Seligman  Mutual Funds already owned and the
total net asset  value of shares of  Seligman  Cash  Management  Fund which were
acquired  through an exchange of shares of another Seligman Mutual Fund on which
there was an initial  sales load at the time of  purchase.  Reduced  sales loads
also may apply to purchases made within a 13-month period starting up to 90 days
before  the  date of  execution  of a letter  of  intent.  For more  information
concerning  the terms of the letter of intent,  see  "Terms  and  Conditions  --
Letter of Intent" in the back of the Prospectus.

     Class A shares  purchased  without an initial sales load in accordance with
the sales load  schedule  in each  Series'  Prospectus,  or pursuant to a Volume
Discount,  Right of Accumulation or Letter of Intent are subject to a CDSL of 1%
on redemptions of such shares within eighteen months of purchase.

PERSONS  ENTITLED  TO  REDUCTIONS.  Reductions  in initial  sales loads apply to
purchases  of Class A shares  of a Series  by a "single  person,"  including  an
individual;  members  of a  family  unit  comprising  husband,  wife  and  minor
children;  or a trustee or other  fiduciary  purchasing  for a single  fiduciary
account.  Employee  benefit  plans  qualified  under Section 401 of the Internal
Revenue Code of 1986, as amended (the "Code"),  tax-exempt  organizations  under
Section 501(c)(3) or (13), and non-qualified employee benefit plans that satisfy
uniform criteria are considered  "single persons" for this purpose.  The uniform
criteria are as follows:


                                      -12-


<PAGE>


1. Employees  must authorize the employer,  if requested by the Fund, to receive
in bulk  and to  distribute  to each  participant  on a  timely  basis  the Fund
prospectuses, reports and other shareholder communications.

2. Employees  participating  in a plan will be expected to make regular periodic
investments  (at  least  annually).   A  participant  who  fails  to  make  such
investments  may be dropped  from the plan by the employer or the Fund 12 months
and 30 days after the last regular investment in his account. In such event, the
dropped participant would lose the discount on share purchases to which the plan
might then be entitled.

3. The employer must solicit its employees for participation in such an employee
benefit plan or authorize and assist an investment  dealer in making  enrollment
solicitations.

ELIGIBLE  EMPLOYEE  BENEFIT  PLANS.  The  table of sales  loads in each  Series'
Prospectus  applies to sales to "eligible  employee  benefit plans," except that
the Fund may sell shares at net asset value to "eligible employee benefit plans"
which have at least (i) $500,000  invested in the Seligman  Mutual Funds or (ii)
50 eligible  employees to whom such plan is made  available.  Such sales must be
made in  connection  with a payroll  deduction  system of plan  funding or other
systems acceptable to Seligman Data Corp., the Fund's shareholder service agent.
Such  sales are  believed  to require  limited  sales  effort and sales  related
expenses and  therefore  are made at net asset value.  Contributions  or account
information for plan  participation  also should be transmitted to Seligman Data
Corp.  by methods  which it  accepts.  Additional  information  about  "eligible
employee  benefit plans" is available from investment  dealers or SFSI. The term
"eligible  employee benefit plan" means any plan or arrangement,  whether or not
tax qualified, which provides for the purchase of Fund shares.

PAYMENT IN Securities.  In addition to cash,  the Fund may accept  securities in
payment for shares of a Series sold at the applicable public offering price (net
asset value plus any applicable sales load) although the Fund does not presently
intend to accept  securities in payment for Series shares.  Generally,  the Fund
will only  consider  accepting  securities  (l) to  increase  its  holdings in a
portfolio  security  of a  Series,  or (2) if the  Manager  determines  that the
offered  securities  are a suitable  investment for a Series and in a sufficient
amount for efficient management. Although no minimum has been established, it is
expected  that the Fund  would not accept  securities  with a value of less than
$100,000  per issue in payment  for  shares.  The Fund may reject in whole or in
part offers to pay for shares of a Series with  securities,  may require partial
payment  in cash for  applicable  sales  loads,  and may  discontinue  accepting
securities as payment for shares of the Series at any time without  notice.  The
Fund will not accept  restricted  securities in payment for Series  shares.  The
Fund will value accepted securities in the manner provided for valuing portfolio
securities of the Fund. Any securities  accepted by the Fund in payment for Fund
shares  will have an active and  substantial  market  and have a value  which is
readily ascertainable. (See "Valuation.")
   
FURTHER  TYPES OF  REDUCTIONS.  Class A shares  also may be  issued  without  an
initial sales load in connection  with the  acquisition  of cash and  securities
owned by other  investment  companies  and personal  holding  companies;  to any
registered  unit investment  trust which is the issuer of periodic  payment plan
certificates, the net proceeds of which are invested in fund shares; to separate
accounts  established  and  maintained by an insurance  company which are exempt
from  registration  under  Section  3(c)(11)  of the  1940  Act;  to  registered
representatives  and  employees  (and their  spouses and minor  children) of any
dealer that has a sales  agreement  with SFSI;  to financial  institution  trust
departments;   to  registered   investment  advisers  exercising   discretionary
investment authority with respect to the purchase of Fund shares; to accounts of
financial  institutions or broker/dealers  that charge account  management fees,
provided the manager or one of its affiliates has entered into an agreement with
respect to such accounts;  pursuant to sponsored arrangements with organizations
which make  recommendations to or permit group  solicitations of, its employees,
members or  participants  in connection with the purchase of shares of the Fund;
to  other  investment  companies  in the  Seligman  Group in  connection  with a
deferred  fee  arrangement  for outside  directors;  and to  "eligible  employee
benefit plans" which have at least (i) $500,000  invested in the Seligman Mutual
Funds  or (ii)  50  eligible  employees  to whom  such  plan is made  available.
"Eligible  employee benefit plan" means any plan or arrangement,  whether or not
tax qualified,  which provides for the purchase of Fund shares.  Sales of shares
to such plans must be made in connection with a payroll deduction system of plan
funding or other system acceptable to Seligman Data Corp.
    
     The Fund may sell Class A shares at net asset  value to present and retired
directors,  trustees,  officers, employees and their spouses (and family members
of the  foregoing) of the Fund, the other  investment  companies in the Seligman
Group,  the Manager,  and other companies  affiliated  with the Manager.  Family
members are defined to include lineal descendants and lineal ancestors, siblings
(and their spouses and children) and any company or  organization  controlled by
any of the


                                      -13-


<PAGE>


foregoing.  Such sales also may be made to employee benefit and thrift plans for
such persons and to any investment advisory, custodial, trust or other fiduciary
account  managed or advised by the Manager or any affiliate.  These sales may be
made for investment purposes only, and shares may be resold only to the Fund.

     Class A shares may be sold at net asset value to these  persons  since such
sales  require  less sales effort and lower sales  related  expenses as compared
with sales to the general public.

MORE ABOUT  Redemptions.  The  procedures  for  redemption  of Fund shares under
ordinary  circumstances  are set forth in each  Series'  Prospectus.  In unusual
circumstances,  payment may be postponed,  or the right of redemption  postponed
for more than seven days, if the orderly liquidation of portfolio  securities is
prevented by the closing of, or restricted trading on the NYSE during periods of
emergency,  or such other  periods as ordered  by the  Securities  and  Exchange
Commission.  Payment  may be made in  securities,  subject to the review of some
state securities  commissions.  If payment is made in securities,  a shareholder
may incur brokerage expenses in converting these securities to cash.

                              DISTRIBUTION SERVICES
   
     SFSI acts as a  general  distributor  of the  shares of the Fund and of the
other  Seligman  Mutual Funds.  The Fund and SFSI are parties to a  Distributing
Agreement dated January 1, 1993. As general  distributor of the Fund's shares of
beneficial  interest,  SFSI allows  commissions  to dealers as indicated in each
Series'  Prospectus.  SFSI  receives the balance of sales loads and any CDSL, if
applicable,  paid by investors.  The following  table sets forth the concessions
received by SFSI,  dealer  commissions,  and CDSL  retained  for each Series for
1997, 1996 and 1995.
<TABLE>
<CAPTION>

SERIES                           SFSI CONCESSIONS                  DEALER COMMISSIONS                   CDSL RETAINED
- ------                           ---------------                   -----------------                    -------------
                             1997      1996       1995         1997       1996        1995        1997     1996       1995
                             ----      ----       ----         ----       ----        ----        ----     ----       ----
<S>                      <C>         <C>        <C>        <C>         <C>         <C>         <C>        <C>       <C>
U.S. Government
  Securities Series      $    4,683  $  9,862   $ 11,889   $   36,460  $   77,484  $   87,970  $  3,312   $3,630    $ 2,634

High-Yield
  Bond Series             1,047,484   709,561    459,799    8,095,350   5,466,375   3,554,416   185,777   88,949     33,929
</TABLE>

     SFSI has assigned its rights to collect any CDSL imposed on  redemptions of
Class B shares to FEP Capital,  L.P. ("FEP").  SFSI has also assigned its rights
to the distribution  fees with respect of Class B shares received by it pursuant
to the  Plans  (other  than  the  portion  of such  fees  used  to make  ongoing
shareholder  servicing  payments to Service  Organizations  as  described in the
Prospectus)  to  FEP,  which  provides  funding  to  SFSI  to  enable  it to pay
commissions to dealers at the time of the sale of the related Class B shares. In
connection  with  the  assignment  of its  rights  to  collect  any CDSL and the
distribution  fees with respect to Class B shares,  SFSI receives  payments from
FEP based on the value of Class B shares  sold.  The  aggregate  amounts of such
payments  from FEP and the Class B  distribution  fees  retained by SFSI for the
year ended  December  31,  1997 was $2,003  for the U.S.  Government  Securities
Series.  The  aggregate  amounts  of such  payments  from  FEP  and the  Class B
distribution  fees retained by SFSI for the year ended December 31, 1997 and the
period ended December 31, 1996 were $1,149,148 and $368,282,  respectively,  for
the High-Yield Bond Series.

     Effective April 1, 1995,  Seligman Services,  Inc. ("SSI"), an affiliate of
the Manager, became eligible to receive commissions from certain sales of Series
shares,  as well as distribution  and service fees pursuant to the Plan. For the
years ended  December  31, 1997 and 1996 and for the period  ended  December 31,
1995, SSI received  commissions from sales of Series shares and distribution and
service fees pursuant to the Plan as follows:
    

                                      -14-


<PAGE>
   
<TABLE>
<CAPTION>

                                  1997                              1996                                1995
                                  ----                              ----                                ----
                                      Distribution and                  Distribution and                       Distribution and
                       COMMISSIONS    SERVICE FEES     COMMISSIONS      SERVICE FEES       COMMISSIONS         SERVICE FEES
                       -----------    ------------     -----------      ------------       ----------          ------------
<S>                    <C>               <C>             <C>               <C>                <C>                 <C> 
U.S. Government
  Securities Series    $    954          $13,630         $ 3,172           $ 12,113           $ 8,380             $ 2,952

High-Yield
  Bond Series            47,851           35,679          29,500             20,797             7,087              19,702
</TABLE>
                                    VALUATION

     Net asset value per share of each class of a Series is determined as of the
close of regular trading on the NYSE,  (normally,  4:00 p.m. Eastern time), each
day that the NYSE is open.  The NYSE is  currently  closed  on New  Year's  Day,
Martin  Luther  King,  Jr. Day,  Presidents'  Day,  Good Friday,  Memorial  Day,
Independence  Day, Labor Day,  Thanksgiving Day and Christmas Day. The Fund will
also  determine  net asset value for each class of a Series on each day in which
there is a sufficient degree of trading in a Series'  portfolio  securities that
the net asset value of Series  shares might be  materially  affected.  Net asset
value per share for a class of a Series is  computed  by  dividing  that  class'
share of the value of the net  assets  of such  Series  (i.e.,  the value of its
assets  less  liabilities)  by the total  number of  outstanding  shares of such
class. All expenses of a Series,  including the Manager's fee, are accrued daily
and taken into account for the purpose of determining  net asset value.  The net
asset value of Class B and Class D shares will  generally  be lower than the net
asset  value of Class A shares as a result of the larger  distribution  fee with
respect to such shares.
    
     Portfolio  securities,  including open short positions and options written,
are  valued at the last sale  price on the  securities  exchange  or  securities
market on which such securities  primarily are traded.  Securities not listed on
an  exchange  or  securities  market,  or  securities  in  which  there  were no
transactions,  are valued at the average of the most recent bid and asked price,
except in the case of open short  positions  where the asked price is available.
Any  securities for which recent market  quotations  are not readily  available,
including  restricted  securities,  are  valued at fair value as  determined  in
accordance with procedures approved by the Fund's Trustees. This value generally
is  determined as the amount which a Series could  reasonably  expect to receive
from an orderly  disposition  of these  securities  over a reasonable  period of
time. Short-term obligations with less than sixty days remaining to maturity are
generally valued at amortized cost. Short-term  obligations with more than sixty
days  remaining  to maturity  will be valued at current  market  value until the
sixtieth  day prior to maturity,  and will then be valued on an  amortized  cost
basis  based on the value on such date  unless  the Board  determines  that this
amortized cost value does not represent fair market value.  Premiums received on
the sale of call options  will be included in the net asset  value,  and current
market value of the options sold by a Series will be  subtracted  from net asset
value.

                                   PERFORMANCE
   
     The annualized  yield for the 30-day period ended December 31, 1997 for the
Class A shares of the U.S. Government  Securities Series and the High-Yield Bond
Series was 5.04% and 8.01%,  respectively.  The annualized yield was computed by
dividing each Series' net  investment  income per share earned during the 30-day
period by the maximum  offering price per share (i.e.,  the net asset value plus
the maximum  sales load of 4.75% of the net amount  invested)  on  December  31,
1997,  which  was the last day of this  period.  The  average  number of Class A
shares of the U.S.  Government  Securities Series and the High-Yield Bond Series
was 6,673,276 and 97,445,070,  respectively,  which was the average daily number
of shares  outstanding  during the 30-day  period that were  eligible to receive
dividends.  The  annualized  yield for the 30-day period ended December 31, 1997
for the  Class  B  shares  of the U. S.  Government  Securities  Series  and the
High-Yield Bond Series was 4.52% and 7.65%,  respectively.  The annualized yield
was  computed by dividing  the Series' net  investment  income per share  earned
during the 30-day period by the maximum  offering price per share (i.e., the net
asset  value) on December 31,  1997,  which was the last day of the period.  The
average number of Class B shares of the U.S.  Government  Securities  Series and
the High-Yield Bond Series was 432,072 and 73,866,904,  respectively,  which was
the average  daily number of shares  outstanding  during the 30-day  period that
were eligible to receive  dividends.  The annualized yield for the 30-day period
ended December 31, 1997 for the Class D shares of the U.S. Government Securities
Series and the  High-Yield  Bond Series was 4.52% and 7.65%,  respectively.  The
annualized yield was computed by dividing each Series' net investment income per
share earned  during the 30-day period by the maximum  offering  price per share
(i.e., the net asset
    
                                      -15-


<PAGE>

   
value) on December 31, 1997, which was the last day of this period.  The average
number  of  Class D shares  of the U.S.  Government  Securities  Series  and the
High-Yield Bond Series was 1,774,675 and 68,792,824, respectively, which was the
average  daily number of shares  outstanding  during the 30-day period that were
eligible to receive  dividends.  Income was  computed by totaling  the  interest
earned on all debt  obligations  during the 30-day period and  subtracting  from
that amount the total of all recurring  expenses incurred during the period. The
30-day yield was then annualized on a bond-equivalent basis assuming semi-annual
reinvestment  and  compounding  of net investment  income,  as described in each
Series' Prospectus.

     The  average  annual  total  returns  for the  Class A  shares  of the U.S.
Government  Securities  Series and the High-Yield  Bond Series for the one-year,
five-year and ten-year periods ended on December 31, 1997 were 3.44%,  4.69% and
6.63%, and 8.86%, 12.63% and 11.80%,  respectively.  These returns were computed
by  subtracting  the maximum  sales load of 4.75% of public  offering  price and
assuming that all of the dividends and gain distributions by the Series over the
relevant  time period were  reinvested.  It was then  assumed that at the end of
each period, the entire amount was redeemed. The average annual total return was
then  determined  by  calculating  the  annual  rate  required  for the  initial
investment to grow to the amount which would have been received upon  redemption
(i.e.,  the average  annual  compound rate of return).  The average annual total
return for the Class B shares of the U.S.  Government  Securities Series for the
period  January 1, 1997  (commencement  of  operations) to December 31, 1997 was
2.32%. The average annual total returns for the Class B shares of the High-Yield
Bond Series for the one-year period ended December 31, 1997 and the period April
22,  1996  (commencement  of  operations)  to  December  31, 1997 were 8.24% and
11.13%,  respectively.  This  return  was  computed  assuming  that  all  of the
dividends and gain distributions paid by the Fund's Class B shares, if any, were
reinvested over the relevant time period. It was then assumed that at the end of
the period the entire amount was redeemed,  subtracting  the applicable CDSL (5%
for the  one-year  period and 4% for the period  since  inception).  The average
annual total  returns for the Class D shares of the U.S.  Government  Securities
Series  and the  High-Yield  Bond  Series  for the  one-year  period  and  since
inception through December 31, 1997 were 6.53% and 3.88%, and 12.24% and 11.80%,
respectively. These amounts were computed assuming that all of the dividends and
gain  distributions paid by each Series' Class D shares, if any, were reinvested
over the  relevant  time  period.  It was then  assumed  that at the end of each
period, the entire amount was redeemed, subtracting the 1% CDSL, if applicable.

     Table A below  illustrates the total return (income and capital) on Class A
shares  of  each  Series  of  the  Fund  with   dividends   invested   and  gain
distributions,  if any,  taken in shares.  It shows that a $1,000  investment in
Class A shares of the U.S. Government Securities Series, assuming payment of the
4.75% sales load,  made on January 1, 1988 had a value of $1,901 on December 31,
1997,  resulting in an aggregate total return of 90.05%; and a $1,000 investment
in Class A shares of the High-Yield Bond Series,  assuming  payment of the 4.75%
sales load,  made on January 1, 1988 had a value of $3,051 on December 31, 1997,
resulting in an aggregate total return of 205.06%. Table B illustrates the total
return (income and capital) on Class B shares of the U.S. Government  Securities
Series  and  the  High-Yield  Bond  Series  with  dividends  invested  and  gain
distributions,  if any,  taken in shares.  It shows that a $1,000  investment in
Class B shares of the U.S. Government Securities Series, made on January 1, 1997
(commencement of offering of Class B shares),  had a value of $1,023 on December
31, 1997,  after payment of the 5% CDSL,  resulting in an aggregate total return
of  2.32%;  and a $1,000  investment  in Class B shares of the  High-Yield  Bond
Series, made on April 22, 1996 (commencement of offering of Class B shares), had
a value of $1,196 on December 31, 1997, after payment of the 4% CDSL,  resulting
in an aggregate  total return of 19.55%.  Table C  illustrates  the total return
(income and capital) on Class D shares of the U.S. Government  Securities Series
and the High-Yield Bond Series with dividends  invested and gain  distributions,
if any, taken in shares.  It shows that a $1,000 investment in Class D shares of
the U.S.  Government  Securities Series made on September 21, 1993 (commencement
of  offering  of Class D shares)  had a value of $1,177 on  December  31,  1997,
resulting in an  aggregate  total  return of 17.69% and a $1,000  investment  in
Class D  shares  of the  High-Yield  Bond  Series  made on  September  21,  1993
(commencement  of  offering of Class D shares) had a value of $1,612 on December
31, 1997,  resulting in an aggregate  total return of 61.16%.  The results shown
should not be considered a representation of the dividend income or gain or loss
in capital  value which may be realized  from an  investment  made in a class of
shares of the Fund today.
    
                                      -16-


<PAGE>

   
                            TABLE A - CLASS A SHARES
<TABLE>
<CAPTION>

                                               VALUE OF
YEAR                         VALUE OF         CAPITAL GAIN       VALUE OF                           TOTAL
ENDED 1                INITIAL INVESTMENT 2  DISTRIBUTIONS       DIVIDENDS        TOTAL VALUE 2     RETURN 1,3
- -------                -------------------   -------------       ---------        -------------     ----------
<S>                           <C>                 <C>            <C>               <C>             <C>        
U.S. Government
Securities Series
- -----------------
12/31/88                      $  944              $--            $   83             $1,027
12/31/89                         942               --               180              1,122
12/31/90                         921               --               272              1,193
12/31/91                         976               --               385              1,361
12/31/92                         961               --               478              1,439
12/31/93                         960               --               587              1,547
12/31/94                         865               --               622              1,487
12/31/95                         956               --               800              1,756
12/31/96                         897               --               854              1,751
12/31/97                         920               --               981              1,901           90.05%

High-Yield
Bond Series
- -----------
12/31/88                      $  946               $--             $  115            $1,061
12/31/89                         863                --                239             1,102
12/31/90                         702                --                320             1,022
12/31/91                         803                --                532             1,335
12/31/92                         866                --                738             1,604
12/31/93                         935                --                976             1,911
12/31/94                         856                --              1,070             1,926
12/31/95                         938                --              1,387             2,325
12/31/96                         977                --              1,693             2,670
12/31/97                       1,018                --              2,033             3,051          205.06%
</TABLE>

                            TABLE B - CLASS B SHARES

<TABLE>
<CAPTION>
                                               VALUE OF
PERIOD/YEAR                VALUE OF          CAPITAL GAIN        VALUE OF                            TOTAL
ENDED 1                INITIAL INVESTMENT 2  DISTRIBUTIONS       DIVIDENDS        TOTAL VALUE 2     RETURN 1,3
- -------                 ------------------   ------------        ---------        -------------     ----------
<S>                           <C>                 <C>            <C>               <C>               <C>        
U.S. Government
Securities Series
- -----------------
12/31/97                      $  974              $--            $   49            $1,023            2.32%

High-Yield
Bond Series
- -----------
12/31/96                      $1,028              $--            $   63            $1,091
12/31/97                       1,030               --               166             1,196            19.55%
    
</TABLE>

                                      -17-

<PAGE>


                            TABLE C - CLASS D SHARES
<TABLE>
<CAPTION>
   
                                              VALUE OF
PERIOD/YEAR                 VALUE OF         CAPITAL GAIN         VALUE OF                            TOTAL
ENDED 1                 INITIAL INVESTMENT 2 DISTRIBUTIONS       DIVIDENDS        TOTAL VALUE 2     RETURN 1,3
- -------                 -------------------- ------------        ---------        -------------     ----------
<S>                           <C>                 <C>             <C>               <C>               <C>        
U.S. Government
Securities Series
- -----------------
12/31/93                      $  982              $--             $   12            $  994
12/31/94                         884               --                 59               943
12/31/95                         977               --                128             1,105
12/31/96                         919               --                176             1,095
12/31/97                         940               --                237             1,177              17.69%

High-Yield
Bond Series
- -----------
12/31/93                      $1,030              $--             $   15             $1,045
12/31/94                         942                --                100             1,042
12/31/95                       1,033                --                214             1,247
12/31/96                       1,077                --                346             1,423
12/31/97                       1,121                --                491             1,612             61.16%
</TABLE>

1    For the ten  years  ended  December  31,  1997  for  Class A  shares;  from
     commencement  of  offering  of  Class  B  shares  of  the  U.S.  Government
     Securities  Series on January 1, 1997 and commencement of offering of Class
     B shares of the High-Yield Bond Series on April 22, 1996; from commencement
     of offering of Class D shares on September 21, 1993.
    
2    The "Value of Initial  Investment"  as of the date  indicated  reflects the
     effect of the maximum sales load or CDSL, if  applicable,  assumes that all
     dividends  and capital gain  distributions  were taken in cash and reflects
     changes  in  the  net  asset  value  of  the  shares   purchased  with  the
     hypothetical  initial investment.  "Total Value" reflects the effect of the
     CDSL, if applicable,  assumes  investment of all dividends and capital gain
     distributions and reflects changes in the net asset value.

3    "Total  Return" for each Series is  calculated  by assuming a  hypothetical
     initial  investment  of $1,000 at the  beginning  of the period  specified,
     subtracting  the maximum  sales load on Class A shares;  determining  total
     value of all dividends and capital gain  distributions that would have been
     paid  during the  period on such  shares  assuming  that each  dividend  or
     capital gain  distribution  was invested in additional  shares at net asset
     value;  calculating  the total  value of the  investment  at the end of the
     period;  subtracting the CDSL on Class B or Class D shares,  if applicable;
     and  finally,  by  dividing  the  difference  between  the  amount  of  the
     hypothetical  initial  investment  at the  beginning  of the period and its
     total  value at the end of the  period by the  amount  of the  hypothetical
     initial investment.

     No adjustments  have been made for any income taxes payable by investors on
dividends invested or gain distributions taken in shares.

     Each of the Series may also  include  its  aggregate  total  return  over a
specified  period in  advertisements  or in information  furnished to present or
prospective shareholders.

                               GENERAL INFORMATION

INFORMATION ABOUT BUSINESS TRUSTS. As indicated in each Series' Prospectus,  the
Fund is  organized  as a business  trust under the laws of the  Commonwealth  of
Massachusetts.   Under  the  Declaration  of  Trust,  the  Fund's  Trustees  are
authorized to classify or reclassify and issue any shares of beneficial interest
of the  Fund  into  any  number  of  other  Series  without  further  action  by
shareholders. The 1940 Act requires that where more than one Series exists, each
Series must be preferred over all other Series in respect of assets specifically
allocated to such Series.

     As a general matter, the Fund will not hold annual or other meetings of the
shareholders.  This is because the Declaration of Trust provides for shareholder
voting only (a) for the election or removal of one or more Trustees if a meeting
is  called  for that  purpose,  (b) with  respect  to any  contract  as to which
shareholder  approval  is  required  by the 1940 Act,  (c)


                                      -18-


<PAGE>


with respect to any termination or  reorganization  of the Fund or any Series to
the extent and as provided in the Declaration of Trust,  (d) with respect to any
amendment of the  Declaration of Trust (other than amendments  establishing  and
designating  new  Series,  abolishing  Series  when  there are no units  thereof
outstanding,  changing the name of the Fund or the name of any Series, supplying
any omission,  curing any ambiguity or curing,  correcting or supplementing  any
provision  thereof which is  internally  inconsistent  with any other  provision
thereof  or which is  defective  or  inconsistent  with the 1940 Act or with the
requirements of the Code or applicable  regulations for the Fund's obtaining the
most  favorable   treatment   thereunder   available  to  regulated   investment
companies),  which  amendments  require  approval  by a  majority  of the shares
entitled to vote, (e) to the same extent as the  stockholders of a Massachusetts
business corporation as to whether or not a court action,  proceeding,  or claim
should or should not be brought or maintained  derivatively or as a class action
on  behalf  of the  Fund or the  shareholders,  and  (f)  with  respect  to such
additional  matters relating to the Fund as may be required by the 1940 Act, the
Declaration of Trust, the By-laws of the Fund, any registration of the Fund with
the Securities and Exchange  Commission (the  "Commission")  or any state, or as
the Trustees may consider necessary or desirable.  Each Trustee serves until the
next meeting of shareholders,  if any, called for the purpose of considering the
election or reelection  of such Trustee or of a successor to such  Trustee,  and
until the election and  qualification of his successor,  if any, elected at such
meeting,  or until such Trustee sooner dies,  resigns,  retires or is removed by
the shareholders or two-thirds of the Trustees.

     The  shareholders  of the Fund  have the  right,  upon the  declaration  in
writing or vote of more than  two-thirds of the Fund's  outstanding  shares,  to
remove a Trustee.  The Trustees will call a meeting of  shareholders  to vote on
the removal of a Trustee upon the written  request of the record  holders of ten
percent of its shares. In addition,  whenever ten or more shareholders of record
who have been such for at least six months  preceding  the date of  application,
and who hold in the aggregate either shares having a net asset value of at least
$25,000 or at least 1 per centum of the outstanding  shares,  whichever is less,
shall apply to the Trustees in writing,  stating  that they wish to  communicate
with other  shareholders with a view to obtaining  signatures to a request for a
meeting for the purpose of voting upon the question of removal of any Trustee or
Trustees and accompanied by a form of communication  and request which they wish
to transmit,  the Trustees shall within five business days after receipt of such
application  either: (1) afford to such applicants access to a list of the names
and addresses of all  shareholders  as recorded on the books of the Fund; or (2)
inform such applicants as to the  approximate  number of shareholders of record,
and the approximate cost of mailing to them the proposed  communication and form
of requests.  If the Trustees elect to follow the latter  course,  the Trustees,
upon the  written  request of such  applicants,  accompanied  by a tender of the
material to be mailed and of the  reasonable  expenses of mailing,  shall,  with
reasonable promptness, mail such material to all shareholders of record at their
addresses as recorded on the books,  unless within five business days after such
tender the Trustees shall mail to such  applicants and file with the Commission,
together with a copy of the material to be mailed, a written statement signed by
at least a majority of the Trustees to the effect that in their  opinion  either
such  material  contains  untrue  statements  of fact or omits  to  state  facts
necessary to make the statements  contained therein not misleading,  or would be
in violation of applicable law, and specifying the basis of such opinion.  After
opportunity for hearing upon the objections  specified in the written  statement
so filed,  the  Commission  may,  and if  demanded  by the  Trustees  or by such
applicants  shall,  enter  an  order  either  sustaining  one or  more  of  such
objections or refusing to sustain any of them. If the Commission  shall enter an
order refusing to sustain any of such  objections,  or if, after the entry of an
order  sustaining one or more of such  objections,  the  Commission  shall find,
after notice and opportunity for hearing,  that all objections so sustained have
been met, and shall enter an order so declaring,  the Trustees shall mail copies
of such material to all shareholders with reasonable  promptness after the entry
of such order and the renewal of such tender.

     Rule 18f-2  under the 1940 Act  provides  that any matter  required  by the
provisions  of the  1940  Act or  applicable  state  law,  or  otherwise,  to be
submitted to the holders of the outstanding  voting  securities of an investment
company such as the Fund shall not be deemed to have been effectively acted upon
unless approved by the holders of a majority of the  outstanding  shares of each
Series affected by such matter.  Rule 18f-2 further provides that a Series shall
be deemed to be affected by a matter  unless it is clear that the  interests  of
such Series in the matter are  substantially  identical  or that the matter does
not significantly affect any interest of such Series.  However, the Rule exempts
the selection of independent  auditors,  the approval of principal  distributing
contracts and the election of trustees from the separate voting  requirements of
the Rule.

     The  shareholders  of a Massachusetts  business trust could,  under certain
circumstances,  be held  personally  liable  as  partners  for its  obligations.
However,  the Declaration of Trust contains an express disclaimer of shareholder
liability for acts or  obligations of the Trust.  The  Declaration of Trust also
provides  for  indemnification  and  reimbursement  of expenses out of a Series'
assets  for any  shareholder  held  personally  liable for  obligations  of such
Series.


                                      -19-


<PAGE>

   
CUSTODIAN.  Investors  Fiduciary Trust Company,  801 Pennsylvania,  Kansas City,
Missouri 64105,  serves as custodian for the Fund. It also maintains,  under the
general  supervision of the Manager,  the accounting  records and determines the
net asset values for the Fund.
    

AUDITORS.  Deloitte & Touche LLP,  independent  auditors,  have been selected as
auditors of the Fund. Their address is Two World Financial Center, New York, New
York 10281.

                              FINANCIAL STATEMENTS
   
     The Annual  Reports to  shareholders  for the year ended  December 31, 1997
contains  schedules  of the  investments  of each  of the  Fund's  Series  as of
December  31,  1997 as well as certain  other  financial  information  as of the
applicable  date.  The  financial  statements  and notes  included in the Annual
Reports, and the Independent  Auditor's Reports thereon, are incorporated herein
by reference.  These Reports will be furnished  without  charge to investors who
request copies of this Statement of Additional Information.
    
                                      -20-


<PAGE>


                                    APPENDIX

                 HISTORY OF J. & W. SELIGMAN & CO. INCORPORATED

         Seligman's  beginnings  date back to 1837,  when Joseph  Seligman,  the
oldest of eight brothers,  arrived in the United States from Germany.  He earned
his  living  as a pack  peddler  in  Pennsylvania,  and  began  sending  for his
brothers. The Seligmans became successful merchants,  establishing businesses in
the South and East.

         Backed by nearly thirty years of business  success  culminating  in the
sale of government  securities to help finance the Civil War - Joseph  Seligman,
with his brothers,  established the international banking and investment firm of
J. & W. Seligman & Co. In the years that followed, the Seligman complex played a
major role in the  geographical  expansion  and  industrial  development  of the
United States.

THE SELIGMAN COMPLEX:

 .... Prior to 1900

o    Helps finance America's fledgling railroads through underwritings.
o    Is admitted to the New York Stock  Exchange  in 1869.  Seligman  remained a
     member of the NYSE until 1993,  when the  evolution of its business made it
     unnecessary.  o Becomes a prominent  underwriter  of corporate  securities,
     including  New York Mutual Gas Light  Company,  later part of  Consolidated
     Edison. o Provides financial  assistance to Mary Todd Lincoln and urges the
     Senate to award her a pension.
o    Is appointed U.S. Navy fiscal agent by President Grant. Becomes a leader in
     raising capital for America's industrial and urban development.


 ...1900-1910

o    Helps Congress finance the building of the Panama Canal.

 ...1910s

o    Participates  in  raising  billions  for Great  Britain,  France and Italy,
     helping to finance World War I.

 ...1920s

o    Participates in hundreds of  underwritings  including those for some of the
     country's largest companies: Briggs Manufacturing,  Dodge Brothers, General
     Motors,  Minneapolis-Honeywell  Regulatory Company,  Maytag Company, United
     Artists Theater Circuit and Victor Talking Machine Company.
   
o    Forms  Tri-Continental  Corporation  in 1929,  today the nation's  largest,
     diversified  closed-end equity investment company,  with over $3 billion in
     assets, and one of its oldest.
    
 ...1930s

o    Assumes  management of Broad Street  Investing  Co. Inc.,  its first mutual
     fund, today known as Seligman Common Stock Fund, Inc.
o    Establishes Investment Advisory Service.


                                      -21-


<PAGE>


 ...1940s

o    Helps shape the Investment Company Act of 1940.
o    Leads in the  purchase  and  subsequent  sale to the public of Newport News
     Shipbuilding  and  Dry  Dock  Company,  a  prototype  transaction  for  the
     investment banking industry.
o    Assumes management of National Investors Corporation, today Seligman Growth
     Fund, Inc.
o    Establishes Whitehall Fund, Inc., today Seligman Income Fund, Inc.

 ...1950-1989

o    Develops new open-end  investment  companies.  Today,  manages more than 40
     mutual fund portfolios.
o    Helps  pioneer  state-specific,  municipal  bond  funds,  today  managing a
     national and 18 state-specific municipal funds.
o    Establishes  Seligman  Portfolios,  Inc.,  an  investment  vehicle  offered
     through variable annuity products.

 ...1990s

o    Introduces  Seligman  Select  Municipal  Fund,  Inc. and  Seligman  Quality
     Municipal  Fund,  Inc.,  two closed-end  funds that invest in  high-quality
     municipal bonds.
o    In 1991  establishes a joint venture with Henderson plc, of London,  known
     as Seligman  Henderson  Co., to offer global and  international  investment
     products.
o    Introduces  to  the  public   Seligman   Frontier   Fund,   Inc.,  a  small
     capitalization mutual fund.
o    Launches  Seligman  Henderson Global Fund Series,  Inc., which today offers
     five separate  series:  Seligman  Henderson  International  Fund,  Seligman
     Henderson  Global  Smaller  Companies  Fund,   Seligman   Henderson  Global
     Technology Fund,  Seligman  Henderson Global Growth  Opportunities Fund and
     Seligman Henderson Emerging Markets Growth Fund.
o    Launches  Seligman  Value Fund Series,  Inc.,  which  currently  offers two
     separate series: Seligman Large-Cap Value Fund and Seligman Small-Cap Value
     Fund.

                                      -22-




<PAGE>
Financial Statements - High-Yield Bond Series
================================================================================
PORTFOLIO OF INVESTMENTS
December 31, 1997

                                  PRINCIPAL
                                   AMOUNT
                                  OR WARRANTS         VALUE
                                 -------------      --------

CORPORATE BONDS  88.9%

ADVERTISING  0.6%
ADAMS OUTDOOR ADVERTISING
  10 3/4%, due 3/15/2006         $10,000,000     $  11,000,000
                                                 -------------
AGRICULTURE  0.4%
IOWA SELECT FARM
  10 3/4%, due 12/1/2005*          7,500,000         7,734,375
                                                 -------------
BROADCASTING  2.7%
CAPSTAR BROADCASTING PARTNERS
  0% (12 3/4%+), due 2/1/2009     20,000,000        14,600,000
PAXSON COMMUNICATIONS
  11 5/8%, due 10/1/2002          15,000,000        16,125,000
SFX BROADCASTING
  10 3/4%, due 5/15/2006          17,500,000        19,250,000
                                                 -------------
                                                    49,975,000
                                                 -------------
CABLE SYSTEMS  12.5%
AMERICAN TELECASTING 0
  (Warrants expiring 8/15/2000)        5,000wts.         5,000
CABLEVISION SYSTEMS
  10 1/2%, due 5/15/2016         $20,000,000        23,350,000
CHARTER COMMUNICATIONS
SOUTHEAST HOLDINGS
  11 1/4%, due 3/15/2006          17,500,000        19,512,500
CHARTER COMMUNICATIONS
SOUTHEAST HOLDINGS
  0% (14%+), due 3/15/2007        25,000,000        19,875,000
COMCAST
  10 5/8%, due 7/15/2012           7,500,000         9,412,500
DIGITAL TELEVISION SERVICES
  12 1/2%, due 8/1/2007*          15,000,000        17,025,000
ECHOSTAR DBS
  12 1/2%, due 7/1/2002           20,000,000        21,700,000
HEARTLAND WIRELESS COMMUNICATIONS
  14%, due 10/15/2004             20,000,000         7,500,000
INTERMEDIA CAPITAL PARTNERS IV
  11 1/4%, due 8/1/2006           30,000,000        33,000,000
NORTHLAND CABLE TELEVISION
  10 1/4%, due 11/15/2007*        10,000,000        10,575,000
NTL
  10%, due 2/15/2007               5,000,000         5,287,500
ROGERS CABLESYSTEMS
  11%, due 12/1/2015              21,500,000        24,940,000
TCI SATELLITE ENTERTAINMENT
  10 7/8%, due 2/15/2007*         30,000,000        31,575,000
TCI SATELLITE ENTERTAINMENT
  0% (121/4% ), due 2/15/2007*     8,250,000         5,527,500
WIRELESS ONE
  13%, due 10/15/2003             10,500,000         3,832,500
WIRELESS ONE 0
  (Warrants expiring 10/15/2000)      15,000wts.        15,000
                                                 -------------
                                                   233,132,500
                                                 -------------
CELLULAR  3.7%
CENTENNIAL CELLULAR
  10 1/8%, due 5/15/2005           9,500,000        10,355,000
CROWN CASTLE INTEMATIONAL
  0% (105/8%+), due 11/15/2007*   15,000,000         9,412,500
METROCALL
  9 3/4%, due 11/1/2007*          10,000,000         9,925,000
PRICE COMMUNICATIONS WIRELESS
  11 3/4%, due 7/15/2007*         20,000,000        21,800,000
PRICELLULAR WIRELESS
  10 3/4%, due 11/1/2004          16,000,000        17,400,000
                                                 -------------
                                                    68,892,500
                                                 -------------
CHEMICALS  0.9%
TEXAS PETROCHEMICALS
  11 1/8%, due 7/1/2006           15,000,000        16,200,000
                                                 -------------
COMPUTER AND RELATED
SERVICES  4.1%
DECISIONONE
  9 3/4%, due 8/1/2007             8,600,000         8,879,500
DECISIONONE HOLDINGS
  0% (11 1/2%+), due 8/1/2008     17,500,000        11,287,500
UNISYS
  12%, due 4/15/2003              25,000,000        28,437,500
UNISYS
  11 3/4%, due 10/15/2004         25,000,000        28,687,500
                                                 -------------
                                                    77,292,000
                                                 -------------
- ----------------
See footnotes on page .


<PAGE>
================================================================================
PORTFOLIO OF INVESTMENTS
December 31, 1997

                                  PRINCIPAL
                                    AMOUNT            VALUE
                                 -------------      --------

CONSUMER PRODUCTS  3.8%
AMERICAN PAD & PAPER
  13%, due 11/15/2005            $ 5,000,000     $   5,625,000
AMSCAN HOLDINGS
  9 7/8%, due 12/15/2007*         10,000,000        10,275,000
ANCHOR ADVANCED PRODUCTS
  11 3/4%, due 4/1/2004            8,000,000         8,640,000
CARSON
  10 3/8%, due 11/1/2007*         10,000,000        10,050,000
FRENCH FRAGRANCES
  10 3/8%, due 5/15/2007          10,000,000        10,500,000
NORTH ATLANTIC TRADING
  11%, due 6/15/2004               7,250,000         7,612,500
RYDER TRS
  10%, due 12/1/2006              18,500,000        18,592,500
                                                 -------------
                                                    71,295,000
                                                 -------------
CONTAINERS  1.1%
PLASTIC CONTAINERS
  10%, due 12/15/2006             10,000,000        10,650,000
U.S. CAN
  10 1/8%, due 10/15/2006         10,000,000        10,650,000
                                                 -------------
                                                    21,300,000
                                                 -------------
ENERGY  0.6%
ABRAXAS PETROLEUM
  11 1/2%, due 11/1/2004          10,000,000        10,975,000
                                                 -------------
EQUIPMENT  1.1%
WILLIAMS SCOTSMAN
  9 7/8%, due 6/1/2007            20,000,000        20,900,000
                                                 -------------
FINANCIAL SERVICES  2.3%
AMRESCO
  10%, due 3/15/2004              10,000,000        10,425,000
DOLLAR FINANCIAL GROUP
  10 7/8%, due 11/15/2006         10,750,000        11,663,750
OCWEN CAPITAL TRUST I
  10 7/8%, due 8/1/2027           10,000,000        10,900,000
SUPERIOR NATIONAL CAPITAL TRUST I
  10 3/4%, due 12/1/2017*          2,275,000         2,337,562
VERITAS CAPITAL TRUST
  10%, due 1/1/2028*               6,825,000         6,978,563
                                                 -------------
                                                    42,304,875
                                                 -------------
FOOD  3.8%
AFC ENTERPRISES
  10 1/4%, due 5/15/2007          15,000,000        15,825,000
AMERIKING
  10 3/4%, due 12/1/2006          15,000,000        15,825,000
AMERISERVE FOOD
  10 1/8%, due 7/15/2007          20,000,000        21,100,000
GORGES/QUIK-TO-FIX FOODS
  11 1/2%, due 12/1/2006          12,000,000        12,720,000
INTERNATIONAL HOME FOODS
  10 3/8%, due 11/1/2006           5,000,000         5,512,500
                                                 -------------
                                                    70,982,500
                                                 -------------
GAMING/HOTEL  11.1%
ALLIANCE GAMING
  10%, due 8/1/2007*               7,500,000         7,546,875
AMERISTAR CASINOS
  10 1/2%, due 8/1/2004*          17,250,000        17,681,250
AZTAR
  13 3/4%, due 10/1/2004          15,000,000        17,250,000
CASINO AMERICA
  12 1/2%, due 8/1/2003           30,000,000        32,737,500
CASINO MAGIC OF LOUISIANA
  13%, due 8/15/2003              15,000,000        14,475,000
COAST HOTELS & CASINOS
  13%, due 12/15/2002             23,000,000        26,105,000
FITZGERALDS GAMING
  12 1/4%, due 12/15/2004*         9,750,000         9,920,625
SHOWBOAT
  13%, due 8/1/2009                8,500,000        10,582,500
SHOWBOAT MARINA CASINO
PARTNERSHIP
  13 1/2%, due 3/15/2003          15,000,000        18,075,000
TRUMP ATLANTIC CITY FUNDING
  11 1/4%, due 5/1/2006           28,795,000        28,219,100
TRUMP ATLANTIC CITY FUNDING
  11 1/4%, due 5/1/2006*           3,785,000         3,671,450
TRUMP HOTELS & CASINO
RESORTS
  15 1/2%, due 6/15/2005          18,000,000        20,610,000
                                                 -------------
                                                   206,874,300
                                                 -------------

- ------------
See footnotes on page 12.


<PAGE>

================================================================================
PORTFOLIO OF INVESTMENTS
December 31, 1997

                                  PRINCIPAL
                                    AMOUNT            VALUE
                                 -------------      --------
HEALTH CARE/MEDICAL
PRODUCTS  4.9%
ALARIS MEDICAL SYSTEMS
  9 3/4%, due 12/1/2006          $16,000,000     $  16,880,000
ALLIANCE IMAGING
  9 5/8%, due 12/15/2005           4,500,000         4,601,250
DADE INTERNATIONAL
  11 1/8%, due 5/1/2006           16,000,000        17,680,000
GRAPHIC CONTROLS
  12%, due 9/15/2005              13,000,000        14,560,000
PARACELSUS HEALTHCARE
  10%, due 8/15/2006              17,000,000        17,425,000
PARAGON HEALTH NETWORK
  0% (10 1/2%+), due 11/1/2007*   15,000,000         9,375,000
SUN HEALTHCARE GROUP
  9 1/2%, due 7/1/2007*           10,000,000        10,300,000
                                                 -------------
                                                    90,821,250
                                                 -------------
LEISURE  2.3%
AFFINITY GROUP HOLDING
  11%, due 4/1/2007               17,000,000        18,190,000
AMF GROUP
  0% (12 1/4%+), due 3/15/2006    10,000,000         7,912,500
PREMIER PARKS
  12%, due 8/15/2003              11,000,000        12,292,500
PREMIER PARKS
  9 3/4%, due 1/15/2007            3,750,000         4,012,500
                                                 -------------
                                                    42,407,500
                                                 -------------
MANUFACTURING  1.8%
AIRXCEL
  11%, due 11/15/2007*            10,000,000        10,350,000
BPC HOLDING
  12 1/2%, due 6/15/2006          12,000,000        13,260,000
CLARK-SCHWEBEL
  12 1/2%, due 7/15/2007*          4,231,448         4,548,807
INTERNATIONAL KNIFE & SAW
  11 3/8%, due 11/15/2006          2,950,000         3,200,750
WERNER HOLDINGS
  10%, due 11/15/2007*             2,275,000         2,343,250
                                                 -------------
                                                    33,702,807
                                                 -------------
METALS  1.8%
KOPPERS INDUSTRY
  9 7/8%, due 12/1/2007*           2,275,000         2,354,625
RENCO METALS
  11 1/2%, due 7/1/2003           15,000,000        16,012,500
ROYAL OAK MINES
  11%, due 8/15/2006              20,750,000        14,628,750
                                                 -------------
                                                    32,995,875
                                                 -------------
PAGING  4.6%
MOBILE TELECOMMUNICATION
TECHNOLOGIES
  13 1/2%, due 12/15/2002         26,500,000        30,872,500
PAGING NETWORK
  10%, due 10/15/2008             35,000,000        36,443,750
PRONET
  11 7/8%, due 6/15/2005          18,000,000        19,440,000
                                                 -------------
                                                    86,756,250
                                                 -------------
PAPER AND PACKAGING  1.1%
CROWN PAPER
  11%, due 9/1/2005               20,000,000        20,700,000
                                                 -------------
PUBLISHING  2.3%
AMERICAN LAWYER MEDIA HOLDINGS
  9 3/4%, due 12/15/2007*         10,000,000        10,200,000
AMERICAN LAWYER MEDIA HOLDINGS
  0% (12 1/4%+), due 12/15/2008*   3,450,000         1,966,500
PERRY-JUDD
  10 5/8%, due 12/15/2007*         3,800,000         3,971,000
PETERSEN PUBLISHING
  11 1/8%, due 11/15/2006         10,000,000        11,350,000
TRANSWESTERN HOLDINGS
  0% (11 7/8%+), due 11/15/2008*   9,150,000         5,535,750
TRANSWESTERN PUBLISHING
  9 5/8%, due 11/15/2007*          2,270,000         2,372,150
VON HOFFMAN PRESS
  10 3/8%, due 5/15/2007*+         6,750,000         7,256,250
                                                 -------------
                                                    42,651,650
                                                 -------------
- --------------
See footnotes on page 12.


<PAGE>
================================================================================
PORTFOLIO OF INVESTMENTS
December 31, 1997

                                  PRINCIPAL
                                    AMOUNT
                                  OR WARRANTS         VALUE
                                 -------------      --------



RECORD STORAGE  0.5%
PIERCE LEAHY
  11 1/8%, due 7/15/2006         $ 7,500,000     $   8,512,500
                                                 -------------
RETAILING  1.4%
CENTRAL TRACTOR
  10 5/8%, due 4/1/2007           15,000,000        15,900,000
COLE NATIONAL GROUP
  9 7/8%, due 12/31/2006          10,000,000        10,750,000
                                                 -------------
                                                    26,650,000
                                                 -------------
SUPERMARKETS   2.0%
JITNEY-JUNGLE STORES OF AMERICA
  12%, due 3/1/2006               16,000,000        18,240,000
JITNEY-JUNGLE STORES OF AMERICA
  10 3/8%, due 9/15/2007          10,000,000        10,425,000
PATHMARK STORES
  11 5/8%, due 6/15/2002          11,250,000         9,168,750
                                                 -------------
                                                    37,833,750
                                                 -------------
TECHNOLOGY  2.3%
ADVANCED MICRO DEVICES
  11%, due 8/1/2003               20,000,000        21,500,000
THERMA-WAVE
  10 5/8%, due 5/15/2004          10,500,000        10,972,500
VIASYSTEMS
  9 3/4%, due 6/1/2007            10,000,000        10,387,500
                                                 -------------
                                                    42,860,000
                                                 -------------
TELECOMMUNICATIONS  12.7%
BTI TELECOM
  10 1/2%, due 9/15/2007*         15,000,000        15,375,000
GCI
  9 3/4%, due 8/1/2007            11,250,000        11,728,125
GLOBALSTAR
  11 1/4%, due 6/15/2004          12,500,000        12,593,750
ICG HOLDINGS
  0% (11 5/8%+), due 3/15/2007    15,500,000        10,617,500
INTERMEDIA COMMUNICATIONS
  0% (12 1/2%+), due 5/15/2006    10,000,000         7,900,000
INTERMEDIA COMMUNICATIONS
  0% (11 1/4%+), due 7/15/2007    10,000,000         7,175,000
INTERMEDIA COMMUNICATIONS
  (Warrants expiring 6/1/2000)*o       4,000wts.       440,000
ITC DELTACOM
  11%, due 6/1/2007               15,600,000        17,238,000
IXC COMMUNICATIONS
  12 1/2%, due 10/1/2005          25,000,000        28,937,500
NEXTEL COMMUNICATIONS
  0% (10.65%+), due 9/15/2007*    25,000,000        15,875,000
NEXTLINK COMMUNICATIONS
  12 1/2%, due 4/15/2006          22,500,000        25,762,500
POWERTEL
  11 1/8%, due 6/1/2007           17,500,000        19,075,000
RCN
  10%, due 10/15/2007*            15,000,000        15,637,500
RCN
  0% (11 1/8%+), due 10/15/2007*  12,500,000         7,875,000
SPRINT SPECTRUM
  11%, due 8/15/2006              15,000,000        16,950,000
TALTON HOLDINGS
  11%, due 6/30/2007*             10,000,000        10,900,000
VERIO
  13 1/2%, due 6/15/2004*         10,500,000        12,600,000
                                                 -------------
                                                   236,679,875
                                                 -------------
THEATERS  1.2%
HOLLYWOOD THEATERS
  10 5/8%, due 8/1/2007*          11,500,000        12,276,250
PLITT THEATERS
  10 7/8%, due 6/15/2004          10,000,000        10,850,000
                                                 -------------
                                                    23,126,250
                                                 -------------
TRANSPORTATION  0.7%
ATLAS AIR
  10 3/4%, due 8/1/2005           12,500,000        13,250,000
                                                 -------------
UTILITIES  0.6%
MIDLAND COGENERATION VENTURE
  11 3/4%, due 7/23/2005          10,000,000        11,999,060
                                                 -------------
TOTAL CORPORATE BONDS
(Cost $1,601,001,632)                            1,659,804,817
                                                 --------------

- --------------
See footnotes on page 12.
                                                                          
<PAGE>

================================================================================
PORTFOLIO OF INVESTMENTS
December 31, 1997

                                     SHARES           VALUE
                                 -------------      --------



PREFERRED STOCKS  3.8%
BROADCASTING  2.2%
CAPSTAR BROADCASTING PARTNERS 12%     60,000    $    6,915,000
CHANCELLOR MEDIA 12%                 105,881        12,202,785
SFX BROADCASTING 12 5/8%             100,000        11,425,000
SINCLAIR CAPITAL 11 5/8%             100,000        11,075,000
                                                --------------
                                                    41,617,785
                                                --------------
CABLE SYSTEMS  0.6%
ECHOSTAR COMMUNICATIONS 12 1/8%*       6,450         6,756,375
PEGASUS COMMUNICATIONS 12 3/4%         3,500         3,911,250
                                                --------------
                                                    10,667,625
                                                --------------
TELECOMMUNICATIONS  1.0%
IXC COMMUNICATIONS 12 1/2%*            9,346        10,958,172
NEXTLINK COMMUNICATIONS 14%          110,911         6,904,210
                                                --------------
                                                    17,862,382
                                                --------------
TOTAL PREFERRED STOCKS
(Cost $62,111,991)                                  70,147,792
                                                --------------

CONVERTIBLE BONDS  1.1%

TECHNOLOGY  1.1%
EMC
  3 1/4%, due 3/15/2002         $  6,250,000    $    8,492,187
XILINX
  5 1/4%, due 11/1/2002*          12,500,000        12,171,875
                                                --------------
TOTAL CONVERTIBLE BONDS
(Cost $20,354,052)                                  20,664,062
                                                --------------

CONVERTIBLE PREFERRED STOCKS  0.4%
(Cost $5,059,500)
BROADCASTING  0.4%
CHANCELLOR MEDIA $3*                 100,000shs.     7,737,500
                                                --------------

SHORT-TERM HOLDINGS  3.4%
(Cost $64,100,000)                                  64,100,000
                                                --------------
TOTAL INVESTMENTS  97.6%
(Cost $1,752,627,175)                            1,822,454,171
OTHER ASSETS LESS LIABILITIES  2.4%                 44,239,395
                                                --------------
NET ASSETS 100.0%                               $1,866,693,566
                                                ==============

- ----------------
* Rule 144A security.
o Non-income producing security.
+ Deferred interest debentures pay no interest for a stipulated number of years,
  after which they pay the indicated coupon rate.
See Notes to Financial Statements.


<PAGE>

<TABLE>
<CAPTION>
=============================================================================================================================
STATEMENT OF ASSETS AND LIABILITIES
December 31, 1997


ASSETS:
Investments, at value:
<S>                                                                                 <C>                        <C>
  Long-term holdings (cost $1,688,527,175) .............................            $1,758,354,171
  Short-term holdings (cost $64,100,000) ...............................                64,100,000             $1,822,454,171
                                                                                    --------------
Cash .............................................................................................                  2,433,724
Receivable for interest and dividends ............................................................                 40,793,668
Receivable for Shares of Beneficial Interest sold ................................................                 17,383,621
Expenses prepaid to shareholder service agent ....................................................                    240,631
Other ............................................................................................                     65,471
                                                                                                               --------------
TOTAL ASSETS .....................................................................................              1,883,371,286
                                                                                                               --------------

LIABILITIES:
Dividends payable ................................................................................                  6,069,772
Payable for Shares of Beneficial Interest repurchased ............................................                  5,363,844
Payable for securities purchased .................................................................                  2,306,281
Accrued expenses, taxes, and other ...............................................................                  2,937,823
                                                                                                               --------------
TOTAL LIABILITIES ................................................................................                 16,677,720
                                                                                                               --------------
NET ASSETS .......................................................................................             $1,866,693,566
                                                                                                               ==============

COMPOSITION OF NET ASSETS:
Shares of Beneficial Interest, at par (unlimited shares authorized; $.001 par
value; 247,239,953 shares outstanding):
  Class A ........................................................................................             $       99,415
  Class B ........................................................................................                     76,978
  Class D ........................................................................................                     70,847
Additional paid-in capital .......................................................................              1,788,969,465
Undistributed net investment income ..............................................................                  2,353,433
Undistributed net realized gain ..................................................................                  5,296,432
Net unrealized appreciation of investments .......................................................                 69,826,996
                                                                                                               --------------
NET ASSETS .......................................................................................             $1,866,693,566
                                                                                                               ==============

NET ASSET VALUE PER SHARE:
CLASS A ($750,460,846 / 99,414,744 shares) .......................................................             $         7.55
                                                                                                               ==============
CLASS B ($581,234,711 / 76,978,009 shares) .......................................................             $         7.55
                                                                                                               ==============
CLASS D ($534,998,009 / 70,847,200 shares) .......................................................             $         7.55
                                                                                                               ==============


- -----------------
See Notes to Financial Statements.

                                                                                                                       
</TABLE>


<PAGE>

<TABLE>
<CAPTION>
=============================================================================================================================
STATEMENT OF OPERATIONS
For the Year Ended December 31, 1997


<S>                                                                                   <C>         
INVESTMENT INCOME:
Interest ...............................................................              $133,942,745
Dividends ..............................................................                 5,554,714
                                                                                      ------------
TOTAL INVESTMENT INCOME ...........................................................................              $139,497,459

EXPENSES:
Distribution and service fees ..........................................                 8,910,489
Management fee .........................................................                 8,248,354
Shareholder account services ...........................................                 2,371,527
Registration ...........................................................                   633,159
Custody and related services ...........................................                   242,372
Shareholder reports and communications .................................                   170,217
Auditing and legal fees ................................................                    90,262
Trustees' fees and expenses ............................................                    20,939
Miscellaneous ..........................................................                    40,993
                                                                                      ------------
TOTAL EXPENSES ....................................................................................                20,728,312
                                                                                                                 ------------
NET INVESTMENT INCOME .............................................................................               118,769,147

NET REALIZED AND UNREALIZED
GAIN ON INVESTMENTS:
Net realized gain on investments .......................................                 8,663,643
Net change in unrealized appreciation of investments ...................                47,951,783
                                                                                      ------------
NET GAIN ON INVESTMENTS ...........................................................................                56,615,426
                                                                                                                 ------------

INCREASE IN NET ASSETS FROM OPERATIONS ............................................................              $175,384,573
                                                                                                                 ============
</TABLE>

- -----------------
See Notes to Financial Statements.



<PAGE>

<TABLE>
<CAPTION>

=========================================================================================================================
STATEMENTS OF CHANGES IN NET ASSETS

                                                                                             YEAR ENDED DECEMBER 31,
                                                                                       ----------------------------------
                                                                                            1997                 1996
                                                                                       --------------        ------------
OPERATIONS:
<S>                                                                                    <C>                   <C>         
Net investment income ..........................................................       $  118,769,147        $ 45,266,028
Net realized gain on investments ...............................................            8,663,643           8,372,099
Net change in unrealized appreciation of investments ...........................           47,951,783          13,819,543
                                                                                       --------------        ------------
INCREASE IN NET ASSETS FROM OPERATIONS .........................................          175,384,573          67,457,670
                                                                                       --------------        ------------
DISTRIBUTIONS TO SHAREHOLDERS:
Net investment income:
   Class A .....................................................................          (52,770,232)        (27,035,063)
   Class B .....................................................................          (29,874,994)         (3,418,270)
   Class D .....................................................................          (33,770,488)        (14,812,695)
                                                                                       --------------        ------------
DECREASE IN NET ASSETS FROM DISTRIBUTIONS ......................................         (116,415,714)        (45,266,028)
                                                                                       --------------        ------------
</TABLE>

<TABLE>
<CAPTION>
                                                            SHARES
                                                 -------------------------------
                                                     YEAR ENDED DECEMBER 31,
                                                 -------------------------------

                                                    1997                1996
                                                 -----------         -----------
TRANSACTIONS IN SHARES OF
BENEFICIAL INTEREST:*
Net proceeds from sale of shares:
<S>                                               <C>                 <C>                 <C>                 <C>        
   Class A .................................      50,672,448          33,317,666          373,051,522         236,713,393
   Class B .................................      57,673,666          20,232,066          424,606,561         144,036,057
   Class D .................................      37,881,266          24,388,635          278,799,066         173,325,163
Investment of dividends:
   Class A .................................       3,776,320           1,948,207           27,853,774          13,828,199
   Class B .................................       1,826,561             192,948           13,519,667           1,378,143
   Class D .................................       2,805,300           1,287,945           20,704,607           9,145,648
Exchanged from associated Funds:
   Class A .................................      17,851,841          13,049,554          131,875,215          92,654,186
   Class B .................................       3,688,065             480,781           27,115,290           3,420,798
   Class D .................................       6,529,814           4,652,741           47,980,993          32,988,466
                                                 -----------         -----------       --------------        ------------
Total ......................................     182,705,281          99,550,543        1,345,506,695         707,490,053
                                                 -----------         -----------       --------------        ------------
Cost of shares repurchased:
   Class A .................................     (13,770,227)         (7,112,332)        (101,399,738)        (50,385,557)
   Class B .................................      (2,704,575)           (214,512)         (20,021,448)         (1,530,923)
   Class D .................................      (7,327,368)         (2,819,462)         (53,826,777)        (20,024,403)
Exchanged into associated Funds:
   Class A .................................     (15,408,040)        (11,079,755)        (114,001,958)        (78,716,704)
   Class B .................................      (3,899,595)           (297,396)         (28,866,957)         (2,104,964)
   Class D .................................      (5,638,449)         (3,862,279)         (41,466,552)        (27,399,898)
                                                 -----------         -----------       --------------        ------------
Total ......................................     (48,748,254)        (25,385,736)        (359,583,430)       (180,162,449)
                                                 -----------         -----------       --------------        ------------
Increase in Net Assets from
Transactions in Shares of Beneficial
Interest ...................................     133,957,027          74,164,807          985,923,265         527,327,604
                                                 -----------         -----------       --------------        ------------
Increase in Net Assets .........................................................        1,044,892,124         549,519,246

NET ASSETS:
Beginning of year ..............................................................          821,801,442         272,282,196
                                                                                       --------------        ------------
End of Year (including undistributed net investment income of
   $2,353,433 and $0, respectively) ............................................       $1,866,693,566        $821,801,442
                                                                                       ==============        ============

- ----------------
* The Fund began offering Class B shares on April 22, 1996.
See Notes to Financial Statements.


                                                                                                                    
</TABLE>


<PAGE>


================================================================================
NOTES TO FINANCIAL STATEMENTS


1. MULTIPLE CLASSES OF SHARES -- Seligman High-Yield Bond Series (the "Fund"), a
series of Seligman High Income Fund Series, offers three classes of shares. All
shares existing prior to September 21, 1993, the commencement of Class D shares,
were classified as Class A shares. The Fund began offering Class B shares on
April 22, 1996. Class A shares are sold with an initial sales charge of up to
4.75% and a continuing service fee of up to 0.25% on an annual basis. Class A
shares purchased in an amount of $1,000,000 or more are sold without an initial
sales charge but are subject to a contingent deferred sales load ("CDSL") of 1%
on redemptions within 18 months of purchase. Class B shares are sold without an
initial sales charge but are subject to a distribution fee of 0.75%, a service
fee of up to 0.25% on an annual basis, and a CDSL, if applicable, of 5% on
redemptions in the first year of purchase, declining to 1% in the sixth year and
0% thereafter. Class B shares will automatically convert to Class A shares on
the last day of the month that precedes the eighth anniversary of their date of
purchase. Class D shares are sold without an initial sales charge but are
subject to a distribution fee of up to 0.75% and a service fee of up to 0.25% on
an annual basis, and a CDSL, if applicable, of 1% imposed on redemptions made
within one year of purchase. The three classes of shares represent interests in
the same portfolio of investments, have the same rights and are generally
identical in all respects except that each class bears its separate distribution
and certain other class expenses, and has exclusive voting rights with respect
to any matter on which a separate vote of any class is required. 

2. SIGNIFICANT ACCOUNTING POLICIES -- The financial statements have been
prepared in conformity with generally accepted accounting principles which
require management to make certain estimates and assumptions at the date of the
financial statements. The following summarizes the significant accounting
policies of the Fund: 

a. SECURITY VALUATION -- Investments in bonds, stocks and convertible securities
   are valued at current market values or, in their absence, at fair values
   determined in accordance with procedures approved by the Board of Directors.
   Securities traded on national exchanges are valued at last sales prices or,
   in their absence and in the case of over-the-counter securities, at the mean
   of bid and asked prices. Short-term holdings maturing in 60 days or less are
   valued at amortized cost.

b. FEDERAL TAXES -- There is no provision for federal income tax. The Fund has
   elected to be taxed as a regulated investment company and intends to
   distribute substantially all taxable net income and net gain realized. 

c. SECURITY TRANSACTIONS AND RELATED INVESTMENT INCOME -- Investment
   transactions are recorded on trade dates. Identified cost of investments sold
   is used for both financial statement and federal income tax purposes.
   Dividends receivable and payable are recorded on ex-dividend dates. Interest
   income is recorded on an accrual basis. The Fund accretes original issue
   discounts and market discounts on purchases of portfolio securities.

d. REPURCHASE AGREEMENTS -- The Fund may enter into repurchase agreements with
   commercial banks and with broker/dealers deemed to be creditworthy by J. & W.
   Seligman & Co. Incorporated (the "Manager"). Securities received as
   collateral subject to repurchase agreements are deposited with the Fund's
   custodian and, pursuant to the terms of the repurchase agreement, must have
   an aggregate market value greater than or equal to the repurchase price plus
   accrued interest, at all times. Procedures have been established to monitor,
   on a daily basis, the market value of repurchase agreements' underlying
   securities to ensure the existence of the proper level of collateral. 

e. MULTIPLE CLASS ALLOCATIONS -- All income, expenses (other than class-specific
   expenses), and realized and unrealized gains or losses are allocated daily to
   each class of shares based upon the relative value of shares of each class.
   Class-specific expenses, which include distribution and service fees and any
   other items that are specifically attributable to a particular class, are
   charged directly to such class. For the year ended December 31, 1997,
   distribution and service fees were the only class-specific expenses.

f. DISTRIBUTIONS TO SHAREHOLDERS-- Dividends are declared daily and paid
   monthly. Other distributions paid by the Fund are recorded on ex-dividend
   dates. The treatment for financial statement purposes of distributions made
   to shareholders during the year from net investment income or net realized
   gains may differ from their ultimate treatment for federal income tax
   purposes. These differences are caused primarily by differences in the timing
   of the recognition of certain components of income, expense, or realized
   capital gain for federal income tax purposes. Where such differences are
   permanent in nature, they are reclassified in the components of net assets
   based on their ultimate characterization for federal income tax purposes. Any
   such reclassification will have no effect on net assets, results of
   operations, or net asset value per share of the Fund.

3. PURCHASES AND SALES OF SECURITIES -- Purchases and sales of portfolio
securities, excluding US Government obligations and short-term investments, for
the year ended December 31, 1997, amounted to $1,686,931,836 and $780,115,415,
respectively.

   At December 31, 1997, the cost of investments for federal income tax purposes
was substantially the same as the cost for financial reporting purposes, and the
tax basis gross unrealized appreciation and depreciation of portfolio securities
amounted to $97,236,023 and $27,409,027, respectively. 

4. SHORT-TERM INVESTMENTS -- At December 31, 1997, the Fund owned short-term
investments which matured in less than seven days. 



<PAGE>


================================================================================
NOTES TO FINANCIAL STATEMENTS

5. MANAGEMENT FEE, ADMINISTRATIVE SERVICES, AND OTHER TRANSACTIONS -- The
Manager manages the affairs of the Fund and provides the necessary personnel and
facilities. Compensation of all officers of the Fund, all trustees of the Fund
who are employees or consultants of the Manager, and all personnel of the Fund
and the Manager is paid by the Manager. The Manager receives a fee, calculated
daily and payable monthly, equal to 0.65% per annum of the first $1 billion of
the Fund's average daily net assets, 0.55% per annum of the Fund's average daily
net assets in excess of $1 billion. The management fee reflected in the
Statement of Operations represents 0.62% per annum of the Fund's average daily
net assets. 

   Seligman Financial Services, Inc. (the "Distributor"), agent for the
distribution of the Fund's shares, and an affiliate of the Manager, received
concessions of $1,047,484 from sales of Class A shares after commissions of
$8,095,350 were paid to dealers.

   The Fund has an Administration, Shareholder Services and Distribution Plan
(the "Plan") with respect to distribution of its shares. Under the Plan, with
respect to Class A shares, service organizations can enter into agreements with
the Distributor and receive a continuing fee of up to 0.25% on an annual basis,
payable quarterly, of the average daily net assets of the Class A shares
attributable to the particular service organizations for providing personal
services and/or the maintenance of shareholder accounts. The Distributor charges
such fees to the Fund pursuant to the Plan. For the year ended December 31,
1997, fees incurred aggregated $1,399,223, or 0.24% per annum of the average
daily net assets of Class A shares. 

   Under the Plan, with respect to Class B and Class D shares, service
organizations can enter into agreements with the Distributor and receive a
continuing fee for providing personal services and/or the maintenance of
shareholder accounts of up to 0.25% on an annual basis of the average daily net
assets of the Class B and Class D shares for which the organizations are
responsible; and, for Class D shares only, fees for providing other distribution
assistance of up to 0.75% on an annual basis of such average daily net assets.
Such fees are paid monthly by the Fund to the Distributor pursuant to the Plan.

   With respect to Class B shares, a distribution fee of 0.75% on an annual
basis of average daily net assets is payable monthly by the Fund to the
Distributor; however, the Distributor has sold its rights to substantially all
of this fee to a third party (the "Purchaser"), which provides funding to the
Distributor to enable it to pay commissions to dealers at the time of the sale
of the related Class B shares. 

   For the year ended December 31, 1997, fees incurred under the Plan,
equivalent to 1% per annum of the average daily net assets of Class B and Class
D shares, amounted to $3,531,268 and $3,979,998, respectively.

   The Distributor is entitled to retain any CDSL imposed on redemptions of
Class D shares occurring within one year of purchase and on certain redemptions
of Class A shares occurring within 18 months of purchase. For the year ended
December 31, 1997, such charges amounted to $185,777.

   The Distributor has sold its rights to collect any CDSL imposed on
redemptions of Class B shares to the Purchaser. In connection with the sale of
its rights to collect any CDSL and the distribution fees with respect to Class B
shares described above, the Distributor receives payments from the Purchaser
based on the value of Class Bshares sold. The aggregate amount of such payments
and the Class B shares distribution fees retained by the Distributor for the
year ended December 31, 1997, amounted to $1,149,148.

   Seligman Services, Inc., an affiliate of the Manager, is eligible to receive
commissions from certain sales of shares of beneficial interest of the Fund, as
well as distribution and service fees pursuant to the Plan. For the year ended
December 31, 1997, Seligman Services, Inc. received commissions of $47,851 from
the sales of Fund shares.

   Seligman Services, Inc. also received distribution and service fees of
$35,679, pursuant to the Plan. Seligman Data Corp., which is owned by certain
associated investment companies, charged the Fund at cost $2,371,527 for
shareholder account services.

   Certain officers and trustees of the Fund are officers or directors of the
Manager, the Distributor, Seligman Services, Inc., and/or Seligman Data Corp.

   The Fund has a compensation arrangement under which trustees who receive fees
may elect to defer receiving such fees. Interest is accrued on the deferred
balances. The annual cost of such fees and interest is included in trustees'
fees and expenses and the accumulated balance thereof at December 31, 1997, of
$33,589 is included in other liabilities. Deferred fees and the related accrued
interest are not deductible for federal income tax purposes until such amounts
are paid.

6. COMMITTED LINE OF CREDIT -- Effective July 23, 1997, the Fund entered into a
$110 million committed line of credit facility with a group of banks. Borrowings
pursuant to the credit facility will be subject to interest at a rate equal to
the federal funds rate plus 0.50% per annum. The Fund incurs a commitment fee of
0.10% per annum on the unused portion of the credit facility. The credit
facility may be drawn upon only for temporary purposes and is subject to certain
other customary restrictions. The credit facility commitment will expire one
year from the date of the agreement but is renewable with the consent of the
participating banks. To date, the Fund has not borrowed from the credit
facility.

                                                                           
<PAGE>


================================================================================
FINANCIAL HIGHLIGHTS


   The Fund's financial highlights are presented below. "Per share operating
performance" data is designed to allow investors to trace the operating
performance of each Class, on a per share basis, from the beginning net asset
value to the ending net asset value, so that investors can understand what
effect the individual items have on their investment, assuming it was held
throughout the period. Generally, per share amounts are derived by converting
the actual dollar amounts incurred for each item, as disclosed in the financial
statements, to their equivalent per share amounts, using average shares
outstanding.

   "Total return based on net asset value" measures each Class's performance
assuming that investors purchased Fund shares at net asset value as of the
beginning of the period, invested dividends and capital gains paid at net asset
value, and then sold their shares at the net asset value on the last day of the
period. The total return computations do not reflect any sales charges investors
may incur in purchasing or selling shares of the Fund. Total returns for periods
of less than one year are not annualized.
<TABLE>
<CAPTION>

                                                                                        CLASS A
                                                             --------------------------------------------------------

                                                                                YEAR ENDED DECEMBER 31,
                                                               ------------------------------------------------------
                                                                  1997        1996       1995        1994       1993
                                                               --------    --------   --------     -------    -------
<S>                                                            <C>         <C>        <C>          <C>        <C>    
PER SHARE OPERATING PERFORMANCE:
NET ASSET VALUE, BEGINNING OF YEAR ........................    $   7.25    $   6.96   $   6.35     $  6.94    $  6.42
                                                               --------    --------   --------     -------    -------
Net investment income .....................................         .70         .69        .65         .65        .66
Net realized and unrealized investment gain (loss) ........         .28         .29        .61        (.59)       .52
                                                               --------    --------   --------     -------    -------
INCREASE FROM INVESTMENT OPERATIONS .......................         .98         .98       1.26         .06       1.18
Dividends paid or declared ................................        (.68)       (.69)      (.65)       (.65)      (.66)
                                                               --------    --------   --------     -------    -------
NET INCREASE (DECREASE) IN NET ASSET VALUE ................         .30         .29        .61        (.59)       .52
                                                               --------    --------   --------     -------    -------
NET ASSET VALUE, END OF YEAR ..............................    $   7.55    $   7.25   $   6.96     $  6.35    $  6.94
                                                               ========    ========   ========     =======    =======
TOTAL RETURN BASED ON NET ASSET VALUE: ....................       14.26%      14.82%     20.72%        .78%     19.19%

RATIOS/SUPPLEMENTAL DATA:
Expenses to average net assets ............................        1.14%       1.16%      1.09%       1.13%      1.20%
Net investment income to average net assets ...............        9.42%       9.80%      9.73%       9.73%      9.68%
Portfolio turnover ........................................       61.78%     119.33%    173.39%     184.75%    193.91%
NET ASSETS, END OF YEAR (000S omitted) ....................    $750,461    $408,303   $182,129     $59,033    $61,333
</TABLE>


- -----------------
See footnotes on page  .



<PAGE>

<TABLE>
<CAPTION>

=============================================================================================================================
FINANCIAL HIGHLIGHTS


                                                    CLASS B                                    CLASS D
                                             ---------------------   --------------------------------------------------------
                                                YEAR       4/22/96*                                                  9/21/93*
                                                ENDED         TO                  YEAR ENDED DECEMBER 31,                TO
                                                                     ---------------------------------------------
                                              12/31/97    12/31/96     1997         1996         1995        1994    12/31/93
                                             --------    --------    --------     --------     -------     -------    -------
<S>                                          <C>         <C>         <C>          <C>          <C>         <C>        <C>    
PER SHARE OPERATING PERFORMANCE:
NET ASSET VALUE,
BEGINNING OF YEAR                            $   7.26    $   7.06    $   7.26     $   6.96     $  6.35     $  6.94    $  6.74
                                             --------    --------    --------     --------     -------     -------    -------
Net investment income                             .64         .45         .64          .64         .60         .57        .12
Net realized and unrealized
investment gain (loss)                            .28         .20         .28          .30         .61        (.59)       .20
                                             --------    --------    --------     --------     -------     -------    -------
INCREASE (DECREASE) FROM
INVESTMENT OPERATIONS                             .92         .65         .92          .94        1.21        (.02)       .32
Dividends paid or declared                       (.63)       (.45)       (.63)        (.64)       (.60)       (.57)      (.12)
                                             --------    --------    --------     --------     -------     -------    -------
NET INCREASE (DECREASE) IN
NET ASSET VALUE                                   .29         .20         .29          .30         .61        (.59)       .20
                                             --------    --------    --------     --------     -------     -------    -------
NET ASSET VALUE, END OF YEAR                 $   7.55    $   7.26    $   7.55     $   7.26     $  6.96     $  6.35    $  6.94
                                             ========    ========    ========     ========     =======     =======    =======
TOTAL RETURN BASED ON NET
ASSET VALUE:                                    13.24%       9.11%      13.24%       14.10%      19.67%       (.30)%     4.53%
RATIOS/SUPPLEMENTAL DATA:
Expenses to average net assets                   1.90%       1.90%+      1.90%        1.92%       1.91%       2.19%      2.04%+
Net investment income to
average net assets                               8.66%       9.11%+      8.66%        9.02%       8.86%       8.68%      7.93%++
Portfolio turnover                              61.78%     119.33%++    61.78%      119.33%     173.39%     184.75%    193.91%+++
NET ASSETS, END OF YEAR (000S omitted)       $581,235    $147,970    $534,998     $265,528     $90,153     $ 9,249    $ 2,375



- ---------------------
  * Commencement of offering of shares.
  + Annualized.
 ++ For the year ended December 31, 1996.
+++ For the year ended December 31, 1993.
See Notes to Financial Statements.

                                                                                                                       
                                                                                                                        
</TABLE>

<PAGE>

================================================================================
REPORT OF INDEPENDENT AUDITORS

- --------------------------------------------------------------------------------

THE TRUSTEES AND SHAREHOLDERS,
SELIGMAN HIGH-YIELD BOND SERIES:

We have audited the accompanying statement of assets and liabilities, including
the portfolio of investments, of Seligman High-Yield Bond Series as of December
31, 1997, the related statements of operations for the year then ended and of
changes in net assets for each of the years in the two-year period then ended,
and the financial highlights for each of the periods presented. These financial
statements and financial highlights are the responsibility of the Fund's
management. Our responsibility is to express an opinion on these financial
statements and financial highlights based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements and financial
highlights are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of securities owned as of
December 31, 1997, by correspondence with the Fund's custodian and brokers;
where replies were not received from brokers, we performed other auditing
procedures. An audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for our opinion.

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of Seligman High-Yield
Bond Series as of December 31, 1997, the results of its operations, the changes
in its net assets, and the financial highlights for the respective stated
periods in conformity with generally accepted accounting principles.


DELOITTE & TOUCHE LLP
New York, New York
January 30, 1998

- --------------------------------------------------------------------------------



<PAGE>




U.S. Government Securities Series - Financial Statements.

- ------------------------------------------------------------------------------
Portfolio of Investments
December 31, 1997

<TABLE>
<CAPTION>
                                                                                            PRINCIPAL
                                                                                             AMOUNT            VALUE
                                                                                           -----------      -----------
<S>                                                                                      <C>                <C>
US GOVERNMENT SECURITIES  60.4%

US Treasury Bonds:
   8 3/4%, due 5/15/2020.......................................................          $ 6,000,000        $ 7,991,256
   6 5/8%, due 2/15/2027.......................................................           15,000,000         16,284,390

US Treasury Notes:
   6 1/4%, due 6/30/2002.......................................................            4,000,000          4,082,504
   6 5/8%, due 5/15/2007.......................................................            8,000,000          8,472,504
                                                                                                            -----------
TOTAL US GOVERNMENT SECURITIES (Cost $35,627,812)..............................                              36,830,654
                                                                                                            -----------
US GOVERNMENT AGENCY SECURITIES  36.2% (Cost $20,992,978)

Government National Mortgage Association Obligations,
Mortgage-backed Pass-through Certificates:
   7 1/2%, with various maturities from 1/15/2023 to 4/15/2027*................           21,478,908         22,053,688
                                                                                                            -----------
REPURCHASE AGREEMENTS  6.0% (Cost $3,671,000)

HSBC Securities Inc., 5%, maturing 1/2/1998 collateralized by:
   $2,856,000 US Treasury Notes 11 7/8%, due 11/15/2003, with a fair
   market value of $3,757,681..................................................            3,671,000          3,671,000
                                                                                                            -----------

TOTAL INVESTMENTS  102.6% (Cost $60,291,790)..........................................................       62,555,342

OTHER ASSETS LESS LIABILITIES  (2.6)%.................................................................       (1,560,453)
                                                                                                            -----------
NET ASSETS  100.0%....................................................................................      $60,994,889
                                                                                                            ===========
</TABLE>

- -------------
* Investments in mortgage-backed securities are subject to principal paydowns.
  As a result of prepayments from refinancing or satisfaction of the underlying
  mortgage instruments, the average life may be less than the original maturity.
  This, in turn, may impact the ultimate yield realized from these securities.

See Notes to Financial Statements.



<PAGE>

- ------------------------------------------------------------------------------
Statement of Assets and Liabilities
December 31, 1997

<TABLE>
<S>                                                                                     <C>                           <C>
ASSETS:
Investments, at value:
  Long-term holdings (cost $56,620,790).............................................    $58,884,342
  Short-term holdings (cost $3,671,000).............................................      3,671,000                   $62,555,342
                                                                                        -----------
Cash                                                                                                                       30,049
Interest receivable................................................................................                       647,776
Receivable for shares of Beneficial Interest sold..................................................                       149,884
Expenses prepaid to shareholder service agent......................................................                         9,884
Other..............................................................................................                        19,821
                                                                                                                      -----------
Total Assets.......................................................................................                    63,412,756
                                                                                                                      -----------
LIABILITIES:
Payable for shares of Beneficial Interest repurchased..............................................                     2,175,708
Dividends payable..................................................................................                       121,889
Accrued expenses, taxes, and other.................................................................                       120,270
                                                                                                                      -----------
Total Liabilities..................................................................................                     2,417,867
                                                                                                                      -----------
Net Assets.........................................................................................                   $60,994,889
                                                                                                                      ===========
COMPOSITION OF NET ASSETS:
Shares of Beneficial Interest, at par ($.001 par value; unlimited shares
authorized; 8,865,994 shares outstanding):
  Class A..........................................................................................                   $     6,606
  Class B..........................................................................................                           467
  Class D..........................................................................................                         1,793
Additional paid-in capital.........................................................................                    72,981,796
Accumulated net realized loss......................................................................                   (14,259,325)
Net unrealized appreciation of investments.........................................................                     2,263,552
                                                                                                                      -----------
Net Assets.........................................................................................                   $60,994,889
                                                                                                                      ===========
NET ASSET VALUE PER SHARE:

Class A ($45,425,627 / 6,605,989 shares)...........................................................                         $6.88
                                                                                                                            =====
Class B ($3,219,604 / 467,356 shares)..............................................................                         $6.89
                                                                                                                            =====
Class D ($12,349,658 / 1,792,649 shares)...........................................................                         $6.89
                                                                                                                            =====
</TABLE>
- -------------
See Notes to Financial Statements.
                                                                            

<PAGE>

- ------------------------------------------------------------------------------
Statement of Operations
For the Year Ended December 31, 1997

<TABLE>
<S>                                                                                    <C>                             <C>
INVESTMENT INCOME:

Interest.........................................................................................                      $3,758,646

EXPENSES:

Management fee....................................................................     $  271,995
Distribution and service fees.....................................................        197,450
Shareholder account services......................................................        117,897
Registration......................................................................         83,220
Shareholder reports and communications............................................         28,461
Custody and related services......................................................         18,851
Auditing and legal fees...........................................................          9,561
Trustees' fees and expenses.......................................................          9,458
Miscellaneous.....................................................................          8,512
                                                                                       ----------
Total Expenses...................................................................................                         745,405
                                                                                                                       ----------
Net Investment Income............................................................................                       3,013,241

NET REALIZED AND UNREALIZED
GAIN (LOSS) ON INVESTMENTS:
Net realized loss on investments..................................................       (611,943)
Net change in unrealized appreciation of investments..............................      1,949,757
                                                                                       ----------
Net Gain on Investments..........................................................................                       1,337,814
                                                                                                                       ----------
Increase in Net Assets from Operations...........................................................                      $4,351,055
                                                                                                                       ==========
</TABLE>
- --------------
See Notes to Financial Statements.


<PAGE>

- ------------------------------------------------------------------------------
Statements of Changes in Net Assets
<TABLE>
<CAPTION>

                                                                                                    YEAR ENDED DECEMBER 31,
                                                                                              ---------------------------------
                                                                                                   1997                 1996
                                                                                              ------------          -----------
<S>                                                                                           <C>                   <C>
OPERATIONS:
Net investment income...................................................................       $ 3,013,241           $3,451,825
Net realized loss on investments........................................................          (611,943)            (531,212)
Net change in unrealized appreciation of investments....................................         1,949,757           (3,266,304)
                                                                                                ----------           ----------
Increase (Decrease) in Net Assets from Operations.......................................         4,351,055             (345,691)
                                                                                                ----------           ----------
DISTRIBUTIONS TO SHAREHOLDERS:
Net investment income:
   Class A..............................................................................        (2,522,929)          (2,998,077)
   Class B..............................................................................           (45,289)                  --
   Class D..............................................................................          (445,023)            (453,748)
                                                                                                 ----------          ----------
Decrease in Net Assets from Distributions ..............................................        (3,013,241)          (3,451,825)
                                                                                                 ----------          ----------
</TABLE>

<PAGE>

<TABLE>
<CAPTION>

                                                                     SHARES
                                                         ------------------------------
                                                             YEAR ENDED DECEMBER 31,
                                                         ------------------------------
                                                             1997               1996
                                                         -----------        -----------
<S>                                                      <C>               <C>               <C>                   <C>
TRANSACTIONS IN SHARES
OF BENEFICIAL INTEREST:*
Net proceeds from sale of shares:
   Class A............................................      829,234           781,071            5,624,748             5,275,155
   Class B............................................      182,897                --            1,228,800                    --
   Class D............................................      198,244           428,534            1,326,662             2,920,596
Investment of dividends:
   Class A ...........................................      202,913           224,948            1,359,967             1,522,409
   Class B............................................        5,291                --               35,836                    --
   Class D............................................       42,659            48,704              286,730               329,724
Exchanged from associated Funds:
   Class A............................................    1,572,537           487,261           10,660,240             3,303,371
   Class B ...........................................      574,598                --            3,899,673                    --
   Class D ...........................................    1,591,469           585,467           10,742,800             3,947,861
                                                          ---------         ---------           ----------            ----------
Total.................................................    5,199,842         2,555,985           35,165,456            17,299,116
                                                          ---------         ---------           ----------            ----------
Cost of shares repurchased:
   Class A ...........................................   (1,364,274)       (1,236,706)          (9,183,343)           (8,375,696)
   Class B ...........................................      (14,942)               --             (101,411)                   --
   Class D ...........................................     (369,696)         (333,282)          (2,477,886)           (2,247,483)
Exchanged into associated Funds:
   Class A ...........................................   (1,618,861)         (972,823)         (10,932,716)           (6,587,848)
   Class B ...........................................     (280,488)               --           (1,910,778)                   --
   Class D ...........................................   (1,050,159)         (491,240)          (7,074,255)           (3,360,753)
                                                          ---------         ---------           ----------            ----------
Total ................................................   (4,698,420)       (3,034,051)         (31,680,389)          (20,571,780)
                                                          ---------         ---------           ----------            ----------
Increase (Decrease) in Net Assets from
Transactions in Shares of Beneficial Interest ........      501,422          (478,066)           3,485,067            (3,272,664)
                                                          =========         ==========          ----------            ----------
Increase (Decrease) in Net Assets ...................................................            4,822,881            (7,070,180)
NET ASSETS:
Beginning of year ...................................................................           56,172,008            63,242,188
                                                                                               -----------           -----------
End of Year .........................................................................          $60,994,889           $56,172,008
                                                                                               ===========           ===========

</TABLE>
- -------------
* The Fund began offering Class B shares on January 1, 1997.
See Notes to Financial Statements.

                                                                        
<PAGE>

- ------------------------------------------------------------------------------
Notes to Financial Statements

1. Multiple Classes of Shares -- Seligman U.S. Government Securities Series
(the "Fund"), a series of Seligman High Income Fund Series, offers three classes
of shares. All shares existing prior to September 21, 1993, the commencement of
Class D shares, were classified as Class A shares. The Fund began offering Class
B shares on January 1, 1997. Class A shares are sold with an initial sales
charge of up to 4.75% and a continuing service fee of up to 0.25% on an annual
basis. Class A shares purchased in an amount of $1,000,000 or more are sold
without an initial sales charge but are subject to a contingent deferred sales
load ("CDSL") of 1% on redemptions within 18 months of purchase. Class B shares
are sold without an initial sales charge but are subject to a distribution fee
of 0.75%, a service fee of up to 0.25% on an annual basis, and a CDSL, if
applicable, of 5% on redemptions in the first year of purchase, declining to 1%
in the sixth year and 0% thereafter. Class B shares will automatically convert
to Class A shares on the last day of the month that precedes the eighth
anniversary of their date of purchase. Class D shares are sold without an
initial sales charge but are subject to a distribution fee of up to 0.75% and a
service fee of up to 0.25% on an annual basis, and a CDSL, if applicable, of 1%
imposed on certain redemptions made within one year of purchase. The three
classes of shares represent interests in the same portfolio of investments, have
the same rights and are generally identical in all respects except that each
class bears its separate distribution and certain other class expenses, and has
exclusive voting rights with respect to any matter on which a separate vote of
any class is required.

2. Significant Accounting Policies -- The financial statements have been
prepared in conformity with generally accepted accounting principles which
require management to make certain estimates and assumptions at the date of the
financial statements. The following summarizes the significant accounting
policies of the Fund:

a.  Security Valuation -- Investments in US Government and Government agency
    securities are valued at current market values or, in their absence, at fair
    values determined in accordance with procedures approved by the Trustees.
    Securities traded on national exchanges are valued at last sales prices or,
    in their absence and in the case of over-the-counter securities, at the mean
    of bid and asked prices. Short-term holdings maturing in 60 days or less are
    valued at amortized cost.

b.  Federal Taxes -- There is no provision for federal income tax. The Fund has
    elected to be taxed as a regulated investment company and intends to 
    distribute substantially all taxable net income and net gain realized.

c.  Security Transactions and Related Investment Income -- Investment 
    transactions are recorded on trade dates. Identified cost of 
    investments sold is used for both financial statement and federal
    income tax purposes. Dividends receivable and payable are recorded on
    ex-dividend dates. Interest income is recorded on an accrual basis. The Fund
    accretes original issue discounts and market discounts on purchases of
    portfolio securities.

d.  Repurchase Agreements -- The Fund may enter into repurchase agreements with
    commerical banks and with broker/dealers deemed to be creditworthy by J. &
    W. Seligman & Co. Incorporated (the "Manager"). Securities received as
    collateral subject to repurchase agreements are deposited with the Fund's
    custodian and, pursuant to the terms of the repurchase agreement, must have
    an aggregate market value greater than or equal to the repurchase price plus
    accrued interest, at all times. Procedures have been established to monitor,
    on a daily basis, the market value of repurchase agreements' underlying
    securities to ensure the existence of the proper level of collateral.

e.  Multiple Class Allocations -- All income, expenses (other than
    class-specific expenses), and realized and unrealized gains or losses are
    allocated daily to each class of shares based upon the relative value of
    shares of each class. Class-specific expenses, which include distribution
    and service fees and any other items that are specifically attributable to a
    particular class, are charged directly to such class. For the year ended
    December 31, 1997, distribution and service fees were the only
    class-specific expenses.


<PAGE>

- ------------------------------------------------------------------------------
Notes to Financial Statements

f.  Distributions to Shareholders -- Dividends are declared daily and paid
    monthly. Other distributions paid by the Fund are recorded on the
    ex-dividend date. The treatment for financial statement purposes of
    distributions made to shareholders during the year from net investment
    income or net realized gains may differ from their ultimate treatment for
    federal income tax purposes. These differences are caused primarily by
    differences in the timing of the recognition of certain components of
    income, expense, or realized capital gain for federal income tax purposes.
    Where such differences are permanent in nature, they are reclassified
    in the components of net assets based on their ultimate characterization
    for federal income tax purposes. Any such reclassification will have no
    effect on net assets, results of operations, or net asset value per share of
    the Fund.

3. Purchases and Sales of Securities -- Purchases and sales of US Government
obligations, excluding short-term investments, for the year ended December 31,
1997, amounted to $99,697,220 and $95,957,706, respectively.

    At December 31, 1997, the cost of investments for federal income tax
purposes was substantially the same as the cost for financial reporting
purposes, and the tax basis gross unrealized appreciation of portfolio
securities amounted to $2,263,552.

4. Management Fee, Administrative Services, and Other Transactions -- The 
Manager manages the affairs of the Fund and provides the necessary personnel 
and facilities. Compensation of all officers of the Fund, all trustees of 
the Fund who are employees or consultants of the Manager, and all personnel 
of the Fund and the Manager is paid by the Manager. The Manager receives a 
fee, calculated daily and payable monthly, equal to 0.50% per annum of 
the Fund's average daily net assets.

    Seligman Financial Services, Inc. (the "Distributor"), agent for the
distribution of the Fund's shares, and an affiliate of the Manager, received
concessions of $4,683 from sales of Class A shares after commissions of 
$36,460 were paid to dealers.

    The Fund has an Administration, Shareholder Services and Distribution
Plan (the "Plan") with respect to distribution of its shares. Under the Plan,
with respect to Class A shares, service organizations can enter into agreements
with the Distributor and receive a continuing fee of up to 0.25% on an annual
basis, payable quarterly, of the average daily net assets of the Class A shares
attributable to the particular service organizations for providing personal
services and/or the maintenance of shareholder accounts. The Distributor charges
such fees to the Fund pursuant to the Plan. For the year ended December 31,
1997, fees incurred aggregated $97,552, or 0.22% per annum of the average daily
net assets of Class A shares.

    Under the Plan, with respect to Class B and Class D shares, service
organizations can enter into agreements with the Distributor and receive a
continuing fee for providing personal services and/or the maintenance of share
holder accounts of up to 0.25% on an annual basis of the average daily net
assets of the Class B and Class D shares for which the organizations are
responsible; and, for Class D shares only, fees for providing other distribution
assistance of up to 0.75% on an annual basis of such average daily net assets.
Such fees are paid monthly by the Fund to the Distributor pursuant to the Plan.

    With respect to Class B shares, a distribution fee of 0.75% on an annual
basis of average daily net assets is payable monthly by the Fund to the
Distributor; however, the Distributor has sold its rights to substantially all
of this fee to a third party (the "Purchaser"), which provides funding to the
Distributor to enable it to pay commissions to dealers at the time of the sale
of the related Class B shares.

    For the year ended December 31, 1997, fees incurred under the Plan,
equivalent to 1% per annum of the average daily net assets of Class B and Class
D shares, amounted to $9,412 and $90,486, respectively.


<PAGE>

- ------------------------------------------------------------------------------
Notes to Financial Statements


    The Distributor is entitled to retain any CDSL imposed on redemptions of
Class D shares occurring within one year of purchase and on certain
redemptions of Class A shares occurring within 18 months of purchase. For the
year ended December 31, 1997, such charges amounted to $3,312.

    The Distributor has sold its rights to collect any CDSL imposed on
redemptions of Class B shares to the Purchaser. In connection with the sale of
its rights to collect any CDSL and the distribution fees with respect to Class B
shares described above, the Distributor receives payments from the Purchaser
based on the value of Class Bshares sold. The aggregate amount of such payments
and the Class B shares distribution fees retained by the Distributor for the
year ended December 31, 1997, amounted to $2,003.

    Seligman Services, Inc., an affiliate of the Manager, is eligible to receive
commissions from certain sales of shares of beneficial interest of the Fund, as
well as distribution and service fees pursuant to the Plan. For the year ended
December 31, 1997, Seligman Services, Inc. received commissions of $954 from the
sales of Fund shares. Seligman Services, Inc. also received distribution and
service fees of $13,630, pursuant to the Plan.

    Seligman Data Corp., which is owned by certain associated investment
companies, charged the Fund at cost $117,897 for shareholder account services.

    Certain officers and trustees of the Fund are officers or directors of the
Manager, the Distributor, Seligman Services, Inc., and/or Seligman Data Corp.

    The Fund has a compensation arrangement under which trustees who receive
fees may elect to defer receiving such fees. Interest is accrued on the deferred
balances. The annual cost of such fees and interest is included in trustees'
fees and expenses and the accumulated balance thereof at December 31, 1997,
of $42,280 is included in other liabilities. Deferred fees and the related
accrued interest are not deductible for federal income tax purposes until such
amounts are paid.

5. Loss Carryforward -- At December 31, 1997, the Fund had a net loss
carryforward for federal income tax purposes of $14,118,544, which is available
for offset against future taxable net capital gains, expiring in various amounts
through 2005. Accordingly, no capital gain distributions are expected to be paid
to shareholders until net capital gains have been realized in excess of the
available capital loss carryforwards.


<PAGE>

- ------------------------------------------------------------------------------
Financial Highlights

   The Fund's financial highlights are presented below. "Per share operating
performance" data is designed to allow investors to trace the operating 
performance of each Class, on a per share basis, from the beginning net asset 
value to the ending net asset value, so that investors can understand what 
effect the individual items have on their investment, assuming it was held 
throughout the period. Generally, per share amounts are derived by converting 
the actual dollar amounts incurred for each item, as disclosed in the financial 
statements, to their equivalent per share amounts, using average shares 
outstanding.

   "Total return based on net asset value" measures each Class's performance
assuming that investors purchased Fund shares at net asset value as of the
beginning of the period, invested dividends and capital gains paid at net asset
value, and then sold their shares at the net asset value on the last day of the
period. The total return computations do not reflect any sales charges investors
may incur in purchasing or selling shares of the Fund. Total returns for periods
of less than one year are not annualized.

<TABLE>
<CAPTION>
                                                                                    CLASS A
                                                        --------------------------------------------------------------
                                                                            YEAR ENDED DECEMBER 31,
                                                        --------------------------------------------------------------
                                                         1997         1996           1995         1994         1993
                                                        --------     --------      --------     --------      --------
<S>                                                     <C>          <C>           <C>          <C>           <C>
PER SHARE OPERATING PERFORMANCE:

Net Asset Value, Beginning of Year                       $6.71        $7.15         $6.47        $7.18          $7.19
                                                         -----        -----         -----        -----          -----
Net investment income ...............................      .38          .41           .46          .44            .53
Net realized and unrealized investment gain (loss)...      .17         (.44)          .68         (.71)          (.01)
                                                         -----        -----         -----        -----          -----
Increase (Decrease) from Investment
Operations...........................................      .55         (.03)         1.14         (.27)           .52
Dividends paid or declared...........................     (.38)        (.41)         (.46)        (.44)          (.53)
                                                         -----        -----         -----        -----          -----
Net Increase (Decrease) in Net Asset Value...........      .17         (.44)          .68         (.71)          (.01)
                                                         -----        -----         -----        -----          -----
Net Asset Value, End of Year ........................    $6.88        $6.71         $7.15        $6.47          $7.18
                                                         =====        =====         =====        =====          =====
TOTAL RETURN BASED ON NET
ASSET VALUE:                                              8.53%       (0.29)%       18.15%       (3.88)%         7.46%

RATIOS/SUPPLEMENTAL DATA:
Expenses to average net assets ......................     1.23%        1.14%         1.14%        1.10%          1.11%
Net investment income to average net assets .........     5.68%        6.05%         6.71%        6.49%          7.22%
Portfolio turnover ..................................   193.90%      175.25%       213.06%      445.18%        170.35%
Net Assets, End of Year (000s omitted)...............  $45,426      $46,889       $55,061      $54,714        $69,805


</TABLE>

- --------------
See footnotes on page  .

                                                                           
<PAGE>

- ------------------------------------------------------------------------------
Financial Highlights

<TABLE>
<CAPTION>


                                                      CLASS B                           CLASS D
                                                      --------        ------------------------------------- 
                                                       1/1/97*               YEAR ENDED DECEMBER 31,           9/21/93*  
                                                         TO           --------------------------------------      TO
                                                      12/31/97        1997      1996        1995       1994    12/31/93
                                                        -----         -----     -----       -----     -----    --------
<S>                                                    <C>           <C>      <C>         <C>       <C>      <C>
PER SHARE OPERATING PERFORMANCE:

Net Asset Value, Beginning of Year.................     $6.73         $6.73     $7.16       $6.48      $7.20     $7.33
                                                        -----         -----     -----       -----      -----     -----
Net investment income .............................       .33           .33       .36         .40        .37       .09
Net realized and unrealized investment gain (loss)        .16           .16      (.43)        .68       (.72)     (.13)
                                                        -----         -----     -----       -----      -----     -----
Increase (Decrease) from Investment
Operations ........................................       .49           .49      (.07)       1.08       (.35)     (.04)
Dividends paid or declared ........................      (.33)         (.33)     (.36)       (.40)      (.37)     (.09)
                                                        -----         -----     -----       -----      -----      -----
Net Increase (Decrease) in Net Asset Value ........       .16           .16      (.43)        .68       (.72)     (.13)
                                                        -----         -----     -----       -----      -----     -----
Net Asset Value, End of Year ......................     $6.89         $6.89     $6.73       $7.16      $6.48     $7.20
                                                        =====         =====     =====       =====      =====     =====
TOTAL RETURN BASED ON NET
ASSET VALUE:                                             7.32%         7.53%    (0.92)%     17.10%     (5.05)%   (0.65)%

RATIOS/SUPPLEMENTAL DATA:
Expenses to average net assets ....................      2.01%         2.01%     1.92%       2.01%      2.22%     2.09%+
Net investment income to average net assets  ......      4.90%         4.90%     5.27%       5.84%      5.40%     5.28%+
Portfolio turnover ................................    193.90%       193.90%   175.25%     213.06%    445.18%   170.35%++
Net Assets, End of Year (000s omitted) ............    $3,219       $12,350    $9,283      $8,181     $6,062    $2,317


</TABLE>
- --------------
 *  Commencement of offering of shares.
 +  Annualized.
++  For the year ended December 31, 1993.
See Notes to Financial Statements.


<PAGE>

- ------------------------------------------------------------------------------
Report of Independent Auditors

The Trustees and Shareholders,
Seligman U.S. Government Securities Series:

     We have  audited  the  accompanying  statement  of assets and  liabilities,
including the portfolio of investments,  of Seligman U.S. Government  Securities
Series as of December 31, 1997,  the related  statements of  operations  for the
year  then  ended  and of  changes  in net  assets  for each of the years in the
two-year period then ended, and the financial highlights for each of the periods
presented.   These  financial   statements  and  financial  highlights  are  the
responsibility  of the Fund's  management.  Our  responsibility is to express an
opinion on these  financial  statements  and financial  highlights  based on our
audits.

     We conducted  our audits in accordance  with  generally  accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable  assurance  about  whether the  financial  statements  and  financial
highlights are free of material misstatement.  An audit includes examining, on a
test basis,  evidence  supporting  the amounts and  disclosures in the financial
statements.  Our  procedures  included  confirmation  of securities  owned as of
December 31, 1997, by correspondence  with the Fund's  custodian.  An audit also
includes assessing the accounting principles used and significant estimates made
by  management,   as  well  as  evaluating  the  overall   financial   statement
presentation.  We believe  that our audits  provide a  reasonable  basis for our
opinion.

     In our opinion,  such financial statements and financial highlights present
fairly,  in all  material  respects,  the  financial  position of Seligman  U.S.
Government  Securities  Series as of  December  31,  1997,  the  results  of its
operations,  the changes in its net assets, and the financial highlights for the
respective  stated  periods in conformity  with  generally  accepted  accounting
principles.

DELOITTE & TOUCHE LLP
New York, New York
January 30, 1998

 
<PAGE>



                                                               File No. 2-93076
                                                                       811-4103
PART C.      OTHER INFORMATION


ITEM 24.     FINANCIAL STATEMENTS AND EXHIBITS
       (a)     Financial Statements and Schedules:

   
       Part A- Financial Highlights for the Class A shares of each Series of the
               Registrant for the ten years ended December 31, 1997; Financial
               Highlights for the Class B shares of the Seligman U.S. Government
               Securities Series for the period January 1, 1997 (commencement of
               offering) to December 31, 1997; Financial Highlights for the
               Class B shares of the Seligman High-Yield Bond Series for the
               period April 22, 1996 (commencement of offering) to December 31,
               1997; and for the Class D shares of each Series of the Registrant
               for the period September 21, 1993 (commencement of offering) to
               December 31, 1997.

       Part B- Financial Statements for each Series, which are included in the
               Fund's Annual Report to Shareholders dated December 31, 1997, are
               incorporated by reference in the Fund's Statement of Additional
               Information. These Financial Statements are: Portfolio of
               Investments as of December 31, 1997; Statement of Assets and
               Liabilities as of December 31, 1997; Statement of Operations for
               the year ended December 31, 1997; Statement of Changes in Net
               Assets for the years ended December 31, 1997 and 1996; Notes to
               Financial Statements; Financial Highlights for the five years
               ended December 31, 1997 for each Series' Class A shares; for the
               period January 1, 1997 (commencement of offering) to December 31,
               1997 for the Seligman U.S. Government Securities Series' Class B
               shares; for the period April 22, 1996 (commencement of offering)
               to December 31, 1997 for the Seligman High-Yield Bond Series'
               Class B shares; and for the period September 21, 1993
               (commencement of offering) to December 31, 1997 for each Series'
               Class D shares; Report of Independent Auditors.
    

       (b)     Exhibits: All Exhibits have been previously filed except Exhibits
               marked with an asterisk (*) which are incorporated herein.

(1)    Form of Amended and Restated Declaration of Trust. (Incorporated by
       reference to Registrant's Post-Effective Amendment No. 22, filed on
       December 31, 1996.)

(2)    Form of Restatement of Bylaws. (Incorporated by reference to Registrant's
       Post-Effective Amendment No. 22, filed on December 31, 1996.)

(3)    Not applicable.

(4)    Specimen Stock Certificate for Class A Shares. (Incorporated by Reference
       to Post-Effective Amendment No. 18 filed on April 29, 1994.)

(4a)   Specimen Stock Certificate for Class B Shares. (Incorporated by reference
       to Form SE filed on April 16, 1996).

(4b)   Specimen Stock Certificate for Class D Shares. (Incorporated by Reference
       to Post-Effective Amendment No. 17 filed on September 21, 1993.)

(5)    Copy of Management Agreement between Seligman High-Yield Bond Series of
       the Registrant and J. & W. Seligman & Co. Incorporated. (Incorporated by
       Reference to Post-Effective Amendment No. 20 filed April 19, 1996.)

(5a)   Copy of Management Agreement between U.S. Government Securities Series of
       the Registrant and J & W. Seligman & Co. Incorporated. (Incorporated by
       Reference to Post-Effective Amendment No. 19 filed on May 1, 1995.)

   
(6)    Copy of the new Distributing Agreement between Registrant and Seligman
       Financial Services, Inc. (Incorporated by reference to Registrant's
       Post-Effective Amendment No. 23, filed April 29, 1997.)
    

(6a)   Copy of amended Sales Agreement between Seligman Financial Services, Inc.
       and Dealers. (Incorporated by Reference to Post-Effective Amendment No.
       20 filed April 19, 1996.)

<PAGE>



                                                               File No. 2-93076
                                                                       811-4103
PART C.      OTHER INFORMATION (continued)
ITEM 24.     FINANCIAL STATEMENTS AND EXHIBITS (continued)

(6b)   Form of Sales Agreement between Seligman Financial Services, Inc. and
       Dean Witter Reynolds, Inc. (Incorporated by reference to Exhibit 6b of
       Registration Statement No. 2-33566, Post-Effective Amendment No. 53,
       filed on April 28, 1997.)

(6c)   Form of Sales Agreement between Seligman Financial Services, Inc. and
       Dean Witter Reynolds, Inc. with respect to certain Chilean institutional
       investors. (Incorporated by reference to Exhibit 6c of Registration
       Statement No. 2-33566, Post-Effective Amendment No. 53, filed on April
       28, 1997.)

(6d)   Form of Dealer Agreement between Seligman Financial Services, Inc. and
       Smith Barney Inc. (Incorporated by reference to Exhibit 6d of
       Registration Statement No. 2-33566, Post-Effective Amendment No. 53,
       filed on April 28, 1997.)

(7)    Matched Accumulation Plan of J. & W. Seligman & Co. Incorporated.
       (Incorporated by Reference to Exhibit 7 of Registration Statement No.
       2-92487, Post-Effective Amendment No. 21, filed on January 29, 1997.)

   
(7a)   Deferred Compensation Plan for Directors of Seligman High Income Fund.*

(8)    Copy of Custodian Agreement between Registrant and Investors Fiduciary
       Trust Company. (Incorporated by reference to Registrant's Post-Effective
       Amendment No. 23, filed April 29, 1997.)
    

(9)    Not applicable.

   
(10)   Opinion and Consent of Counsel. (Incorporated by reference to
       Registrant's Post-Effective Amendment No. 23, filed April 29, 1997.)
    

(11)   Report and Consent of Independent Auditors.*

(12)   Not applicable.

(13)   Purchase Agreement for Initial Capital between Registrant & J. & W.
       Seligman & Co. Incorporated with respect to Class B shares of the U.S.
       Government Securities Series. (Incorporated by reference to Registrant's
       Post-Effective Amendment No. 22, filed on December 31, 1996.)

(13a)  Purchase Agreement for Initial Capital between Registrant and J. & W.
       Seligman & Co. Incorporated with respect to Class B shares of the
       Seligman High-Yield Bond Series. (Incorporated by reference to
       Post-Effective Amendment No. 20 filed on April 19, 1996.)

(13b)  Purchase Agreement for Initial Capital between Registrant and J. & W.
       Seligman & Co. Incorporated with respect to Registrants' Class D shares.
       (Incorporated by reference to Post-Effective Amendment No. 17, filed on
       September 21, 1993.)

   
(14)   The Seligman Roth/Traditional IRA Information Kit. (Incorporated by
       reference to Exhibit q(1) of Registration Statement No. 333-50295,
       Form N-2, filed on April 16, 1998.)
    

(14a)  The Seligman Simple IRA Plan Set-Up Kit. (Incorporated by reference to
       Exhibit 14 of Registration Statement No. 333-20621, Pre-Effective
       Amendment No. 2, filed on April 17, 1997.)

(14b)  The Seligman Simple IRA Plan Agreement. (Incorporated by reference to
       Exhibit 14 of Registration Statement No. 333-20621, Pre-Effective
       Amendment No. 2, filed on April 17, 1997.)

   
(14c)  Qualified Plan and Trust Basic Plan Document. (Incorporated by reference
       to Exhibit q(4) to Registration No. 333-50295, Form N-2, filed on
       April 16, 1998.)

(14d)  Flexible Standardized 401(k) Profit Sharing Plan Adoption Agreement.
       (Incorporated by reference to Exhibit q(4) to Registration No. 333-50295,
       Form N-2, filed on April 16, 1998.)
    

<PAGE>

                                                               File No. 2-93076
                                                                       811-4103
PART C.      OTHER INFORMATION (continued)

   
(14e)  Flexible Nonstandardized Safe Harbor 401(k) Profit Sharing Plan Adoption
       Agreement. (Incorporated by reference to Exhibit q(4) to Registration No.
       333-50295, Form N-2, filed on April 16, 1998.)

(14f)  Simplified  Employee Pension Plan.  (Incorporated by reference to Exhibit
       14(f) to Registration No. 2-10835, Post-Effective Amendment No. 76, filed
       on April 29, 1998.)

(14g)  Educational   IRA.   (Incorporated  by  reference  to  Exhibit  14(f)  to
       Registration No. 2-10835, Post-Effective Amendment No. 76, filed on April
       29, 1998.)
    

(15)   Form of Administration, Shareholder Services and Distribution Plan of
       Registrant. (Incorporated by reference to Registrant's Post-Effective
       Amendment No. 22, filed on December 31, 1996.)

(15a)  Form of Administration, Shareholder Services and Distribution Agreement
       between Seligman Financial Services, Inc. and Dealers. (Incorporated by
       reference to Registrant's Post-Effective Amendment No. 22, filed on
       December 31, 1996.)

   
(16)   Schedule of Computation of Performance Data provided in Registration
       Statement in response to Item 22. (Incorporated by reference to
       Registrant's Post-Effective Amendment No. 23, filed April 29, 1997.)
    

(17)   Financial Data Schedules meeting the requirements of Rule 483 under the
       Securities Act of 1933.*

(18)   Copy of Multiclass Plan entered into by Registrant pursuant to Rule 18f-3
       under the Investment Company Act of 1940. (Incorporated by reference to
       Registrant's Post-Effective Amendment No. 22, filed on December 31,
       1996.)

Other Exhibits:  Powers of Attorney

ITEM 25.     PERSONS CONTROLLED BY OR UNDER COMMON CONTROL WITH REGISTRANT -
             None.

ITEM 26.     NUMBER OF HOLDERS OF SECURITIES

   
                       (1)                                    (2)
                                                       Number of Record
                  Title of Class                Holders as of March 31, 1998
                  --------------                ----------------------------

              High-Yield Bond Series
                  Class A Common Stock                            28,017
                  Class B Common Stock                            19,772
                  Class D Common Stock                            14,857

              U.S. Government Securities Series
                  Class A Common Stock                             2,377
                  Class B Common Stock                               191
                  Class D Common Stock                               565
    

ITEM 27.     INDEMNIFICATION

   
             Reference  is  made  to the  provisions  of  Articles  Twelfth  and
             Thirteenth  of  Registrant's   Amended  and  Restated  Articles  of
             Incorporation   filed  as  Exhibit  24(b)(1)  and  Article  VII  of
             Registrant's Amended and Restated By-laws filed as Exhibit 24(b)(2)
             to Registrant's Post-Effective Amendment No. 22 to the Registration
             Statement.
    

<PAGE>

                                                               File No. 2-93076
                                                                       811-4103
PART C.      OTHER INFORMATION (continued)

             Insofar  as  indemnification  for  liabilities  arising  under  the
             Securities Act of 1933 may be permitted to directors,  officers and
             controlling  persons of the  registrant  pursuant to the  foregoing
             provisions,  or otherwise,  the  registrant has been advised by the
             Securities and Exchange Commission such  indemnification is against
             public   policy  as  expressed  in  the  Act  and  is,   therefore,
             unenforceable.  In the  event  that  a  claim  for  indemnification
             against such liabilities  (other than the payment by the registrant
             of expenses incurred or paid by a director,  officer or controlling
             person of the registrant in the  successful  defense of any action,
             suit or  proceeding)  is  asserted  by such  director,  officer  or
             controlling   person  in  connection  with  the  securities   being
             registered,  the  registrant  will,  unless in the  opinion  of its
             counsel  the matter  has been  settled  by  controlling  precedent,
             submit to a court of appropriate  jurisdiction the question whether
             such indemnification by it is against public policy as expressed in
             the Act and will be  governed  by the  final  adjudication  of such
             issue.

ITEM 28.     BUSINESS  AND OTHER  CONNECTIONS  OF  INVESTMENT  ADVISER - J. & W.
             Seligman & Co. Incorporated, a Delaware corporation ("Manager"), is
             the  Registrant's  investment  manager.  The Manager also serves as
             investment   manager  to  seventeen  other  associated   investment
             companies.  They are Seligman  Capital  Fund,  Inc.  Seligman  Cash
             Management Fund, Inc.,  Seligman Common Stock Fund, Inc.,  Seligman
             Communications and Information Fund, Inc.,  Seligman Frontier Fund,
             Inc.,  Seligman Growth Fund, Inc.,  Seligman  Henderson Global Fund
             Series,  Inc.,  Seligman Income Fund, Inc., Seligman Municipal Fund
             Series, Inc., Seligman Municipal Series Trust,  Seligman New Jersey
             Municipal Fund, Inc., Seligman Pennsylvania  Municipal Fund Series,
             Seligman  Portfolios,  Inc., Seligman Quality Municipal Fund, Inc.,
             Seligman Select Municipal Fund,  Inc.,  Seligman Value Fund Series,
             Inc. and Tri-Continental Corporation.

   
             The Manager  has an  investment  advisory  service  division  which
             provides  investment  management or advice to private clients.  The
             list  required by this Item 28 of  officers  and  directors  of the
             Manager,  together  with  information  as to  any  other  business,
             profession,  vocation or employment of a substantial nature engaged
             in by such  officers and  directors  during the past two years,  is
             incorporated  by reference to Schedules A and D of Form ADV,  filed
             by the Manager pursuant to the Investment Advisers Act of 1940 (SEC
             File No. 801-15798), which was filed on March 31, 1998.
    

ITEM 29. PRINCIPAL UNDERWRITERS

         (a)  The names of each  investment  company (other than the Registrant)
              for  which   Registrant's   principal   underwriter  is  currently
              distributing  securities  of the  Registrant  and  also  acts as a
              principal  underwriter,  depositor  or  investment  adviser are as
              follows:

              Seligman Capital Fund, Inc.
              Seligman Cash Management Fund, Inc.
              Seligman Common Stock Fund, Inc.
              Seligman Communications and Information Fund, Inc.
              Seligman Frontier Fund, Inc.
              Seligman Henderson Global Fund Series, Inc.
              Seligman Growth Fund, Inc.
              Seligman Income Fund, Inc.
              Seligman Municipal Fund Series, Inc.
              Seligman Municipal Series Trust
              Seligman New Jersey Municipal Fund, Inc.
              Seligman Pennsylvania Municipal Fund Series
              Seligman Portfolios, Inc.
              Seligman Value Fund Series, Inc.

        (b)   Name  of  each  director,   officer  or  partner  of  Registrant's
              principal underwriter named in the answer to Item 21:

<PAGE>
<TABLE>
<CAPTION>
   
                                                                                                  File No. 2-93076
                                                                                                          811-4103
                                                   Seligman Financial Services, Inc.
                                                   ---------------------------------
                                                         As of March 31, 1998
                                                         --------------------
                (1)                                            (2)                                         (3)
         Name and Principal                            Positions and Offices                       Positions and Offices
         Business Address                                with Underwriter                            with Registrant
         ----------------                                ----------------                            ---------------
<S>     <C>                                            <C>                                         <C>
         William C. Morris*                            Director                                    Chairman of the Board 
                                                                                                   and Chief Executive Officer
         Brian T. Zino*                                Director                                    President and Trustee
         Ronald T. Schroeder*                          Director                                    None
         Fred E. Brown*                                Director                                    Trustee Emeritus
         William H. Hazen*                             Director                                    None
         Thomas G. Moles*                              Director                                    None
         David F. Stein*                               Director                                    None
         Stephen J. Hodgdon*                           President                                   None
         Charles W. Kadlec*                            Chief Investment Strategist                 None
         Lawrence P. Vogel*                            Senior Vice President, Finance              Vice President
         Ed Lynch*                                     Senior Vice President, Director             None
                                                       of Marketing
         Mark R. Gordon*                               Senior Vice President, National             None
                                                       Sales Manager
         Gerald I. Cetrulo, III                        Senior Vice President of Sales              None
         140 West Parkway
         Pompton Plains, NJ  07444
         Jonathan G. Evans                             Senior Vice President of Sales              None
         222 Fairmont Way
         Ft. Lauderdale, FL  33326
         Bradley W. Larson                             Senior Vice President of Sales              None
         367 Bryan Drive
         Alamo, CA  94526
         Bruce M. Tuckey                               Senior Vice President of Sales              None
         41644 Chathman Drive
         Novi, MI  48375
         Andrew S. Veasey                              Senior Vice President of Sales              None
         14 Woodside Drive
         Rumson, NJ  07760
         Michelle L. McCann                            Vice President, Manager, Retirement         None
                                                       Plans Marketing
         Scott H. Novak                                Vice President, Insurance Products          None
                                                       Manager
         Michael R. Sanders                            Vice President, Product Manager             None
                                                       Managed Money Services
         Charles L. von Breitenbach, II*               Vice President, Product Manager             None
                                                       Managed Money Services
         Robert T. Hausler*                            Vice President, Global Mutual Funds,        None
                                                       Product Management
         Marsha E. Jacoby*                             Vice President, Offshore Funds              None
         William W. Johnson*                           Vice President, Order Desk                  None
         Tracy A. Salomon*                             Vice President, Retirement                  None
                                                       Marketing Manager
         Helen Simon*                                  Vice President, Sales                       None
                                                       Administration Manager
         J. Brereton Young*                            Vice President, Mutual Funds                None
                                                       Product Manager
         Peter J. Campagna                             Vice President, Regional Retirement         None
         1130 Green Meadow Court                       Plans Manager
         Acworth, GA  30102
</TABLE>
    
<PAGE>
<TABLE>
<CAPTION>

                                                                                                  File No. 2-93076
                                                                                                          811-4103
PART C.      OTHER INFORMATION (continued)


                                               Seligman Financial Services, Inc.
                                               ---------------------------------
                                                      As of March 31, 1998
                                                      --------------------
                 (1)                                          (2)                                          (3)
         Name and Principal                            Positions and Offices                       Positions and Offices
         Business Address                                with Underwriter                            with Registrant
         ----------------                                ----------------                            ---------------
<S>     <C>                                            <C>                                         <C>
   
         Mason S. Flinn                                Vice President, Regional Retirement         None
         159 Varennes                                  Plans Manager
         San Francisco, CA  94133
         Charles E. Wenzel                             Vice President, Regional Retirement         None
         703 Greenwood Road                            Plans Manager
         Wilmington, DE  19807
         James R. Besher                               Regional Vice President                     None
         14000 Margaux Lane
         Town & Country, MO  63017
         Richard B. Callaghan                          Regional Vice President                     None
         7821 Dakota Lane
         Orland Park, IL  60462
         Bradford C. Davis                             Regional Vice President                     None
         241 110th Avenue SE
         Bellevue, WA  98004
         Christopher J. Derry                          Regional Vice President                     None
         2380 Mt. Lebanon Church Road
         Alvaton, KY  42122
         Kenneth Dougherty                             Regional Vice President                     None
         8640 Finlarig Drive
         Dublin, OH  43017
         Andrew Draluck                                Regional Vice President                     None
         4032 E. Williams Drive
         Phoenix, AZ  85024
         Edward S. Finocchiaro                         Regional Vice President                     None
         120 Screenhouse Lane
         Duxbury, MA  02332
         Michael C. Forgea                             Regional Vice President                     None
         32 W. Anapamu Street # 186
         Santa Barbara, CA  93101
         David L. Gardner                              Regional Vice President                     None
         2403 Cayenne Drive
         McKinney, TX  75070
         Carla A. Goehring                             Regional Vice President                     None
         11426 Long Pine Drive
         Houston, TX  77077
         T. Wayne Knowles                              Regional Vice President                     None
         104 Morninghills Court
         Cary, NC  27511
         Judith L. Lyon                                Regional Vice President                     None
         7105 Harbour Landing
         Alpharetta, GA  30005
         David L. Meyncke                              Regional Vice President                     None
         4957 Cross Pointe Drive
         Oldsmar, FL  34677
         Tim O'Connell                                 Regional Vice President                     None
         11908 Acacia Glen Court
         San Diego, CA  92128
         Thomas Parnell                                Regional Vice President                     None
         1575 Edgecomb Road
         St. Paul, MN  55116
         Juliana Perkins                               Regional Vice President                     None
         2348 Adrian Street
         Newbury Park, CA  91320
</TABLE>
    
<PAGE>
<TABLE>
<CAPTION>

                                                                                               File No. 2-93076
                                                                                                       811-4103
PART C.    OTHER INFORMATION (continued)


                                              Seligman Financial Services, Inc.
                                              ---------------------------------
                                                    As of March 31, 1998
                                                    --------------------
                 (1)                                           (2)                                         (3)
         Name and Principal                            Positions and Offices                       Positions and Offices
         Business Address                              with Underwriter                            with Registrant
         ----------------                              ----------------                            ---------------
<S>     <C>                                            <C>                                         <C>
   
         Dave Petzke                                   Regional Vice President                     None
         4016 Saint Lucia Street
         Boulder, CO  80301
         Nicholas Roberts                              Regional Vice President                     None
         200 Broad Street, Apt. 2225
         Stamford, CT  06901
         Diane H. Snowden                              Regional Vice President                     None
         11 Thackery Lane
         Cherry Hill, NJ  08003
         Steve Wilson                                  Regional Vice President                     None
         83 Kaydeross Park
         Saratoga Springs, NY  12866
         Kelli A. Wirth-Dumser                         Regional Vice President                     None
         7121 Jardiniere Court
         Charlotte, NC  28226
         Frank J. Nasta*                               Secretary                                   Secretary
         Aurelia Lacsamana*                            Treasurer                                   None
         Jeffrey S. Dean*                              Assistant Vice President, Marketing         None
         Sandra Floris*                                Assistant Vice President, Order Desk        None
         Keith Landry*                                 Assistant Vice President, Order Desk        None
         Gail S. Cushing*                              Assistant Vice President                    None
                                                       National Accounts Manager
         Joseph M. McGill*                             Vice President and                          None
                                                       Compliance Officer
         Jack Talvy*                                   Assistant Vice President, Internal          None
                                                       Marketing Services Manager
         Joyce Peress*                                 Assistant Secretary                         None
</TABLE>
    

       * The  principal  business  address  of each of  these  directors  and/or
       officers is 100 Park Avenue, New York, NY 10017.

(c) Not applicable

   
ITEM 30.     Location of Accounts and Records
                             (1)    Investors Fiduciary Trust Company
                                    801 Pennsylvania
                                    Kansas City, Missouri  64105 and
                             (2)    Seligman Data Corp.
                                    100 Park Avenue
                                    New York, NY  10017
    

<PAGE>

                                                               File No. 2-93076
                                                                       811-4103
PART C.      OTHER INFORMATION (continued)

   
ITEM 31.     MANAGEMENT SERVICES - Seligman Data Corp. ("SDC") the Registrant's
             shareholder service agent, has an agreement with First Data
             Investor Services Group ("FDISG") pursuant to which FDISG provides
             a data processing system for certain shareholder accounting and
             recordkeeping functions performed by SDC, which commenced in July
             1990. For the years ended December 31, 1997, 1996 and 1995 the
             approximate cost of these services for each Series were:

                                                        1997     1996      1995
                                                        ----     ----      ----
    

   
                U.S. Government Securities Series    $ 18,700  $17,900   $17,700
    

   
                High-Yield Bond Series                261,800   96,000    28,200
    

ITEM 32.     UNDERTAKINGS - The Registrant undertakes, (1) to furnish a copy of
             the Registrant's latest annual report, upon request and without
             charge, to every person to whom a prospectus is delivered and (2)
             if requested to do so by the holders of at least ten percent of its
             outstanding shares, to call a meeting of shareholders for the
             purpose of voting upon the removal of a director or directors and
             to assist in communications with other shareholders as required by
             Section 16(c) of the Investment Company Act of 1940.

<PAGE>

                                                               File No. 2-93076
                                                                       811-4103
                                   SIGNATURES


         Pursuant  to the  requirements  of the  Securities  Act of 1933 and the
Investment Company Act of 1940 the Registrant certifies that it meets all of the
requirements for effectiveness of this Post-Effective Amendment pursuant to Rule
485(b) under the Securities Act of 1933 and has duly caused this  Post-Effective
Amendment No. 24 to its Registration Statement to be signed on its behalf by the
undersigned,  thereunto duly  authorized,  in the City of New York, State of New
York, on the 29th day of April, 1998.

                                        SELIGMAN HIGH INCOME FUND SERIES




                                        By: /s/ WILLIAM C. MORRIS
                                            -----------------------------------
                                                William C. Morris, Chairman


         Pursuant  to the  requirements  of the  Securities  Act of 1933 and the
Investment  Company Act of 1940, this  Post-Effective  Amendment No. 24 has been
signed below by the following  persons in the capacities  indicated on April 29,
1998.

                  Signature                                Title
                  ---------                                -----



/s/ WILLIAM C. MORRIS                        Chairman of the Trustees (Principal
- ---------------------------------------      executive officer) and Trustee
    William C. Morris*                                                     



/s/ Brian T. Zino                            Trustee and President
- ---------------------------------------
    Brian T. Zino



/s/ Thomas G. Rose                           Treasurer (Principal financial and
- ---------------------------------------        Accounting Officer)
    Thomas G. Rose   



John R. Galvin, Trustee            )
Alice S. Ilchman, Trustee          )
Frank A. McPherson, Trustee        )
John E. Merow, Trustee             )
Betsy S. Michel, Trustee           )
James C. Pitney, Trustee           )   /s/  Brian T. Zino
James Q. Riordan, Trustee          )   -----------------------------------------
Richard R. Schmaltz, Trustee       )       *Brian T. Zino, Attorney-In-Fact
Robert L. Shafer, Trustee          )
James N. Whitson, Trustee          )

<PAGE>

                                                               File No. 2-93076
                                                                       811-4103

                        SELIGMAN HIGH INCOME FUND SERIES
                     Post-Effective Amendment No. 24 to the
                       Registration Statement on Form N-1A



                                  EXHIBIT INDEX



Form N-1A Item No.                   Description
- ------------------                   -----------

24(b)(7)(a)                          Deferred Compensation Plan for Directors

24(b)(11)                            Consent of Independent Auditors

24(b)(17)                            Financial Data Schedules

Other Exhibits                       Power of Attorney










- -----
20


                    DEFERRED COMPENSATION PLAN FOR DIRECTORS

                                       OF

                        SELIGMAN HIGH INCOME FUND SERIES
                                    ("FUND")


1. ELECTION TO DEFER PAYMENTS. Any member of the Board of Directors (herein, a
"Director") of the Fund may elect to have payment of that Director's annual
retainer or meeting fees or both for Board service deferred as provided in this
Plan. The election shall be made in writing prior to, and to take effect from,
the beginning of a calendar year. For any Director in the year in which this
Plan is adopted or for a person elected a director in other than the last
calendar month of a year, the election shall be made within 30 days after that
event and prior to, and to take effect from, the beginning of the calendar
quarter next ensuing after that event. Elections shall continue in effect until
terminated in writing, any such termination to take effect on the first day of
the calendar year beginning after receipt of the notice of termination. An
election shall be irrevocable as to payments deferred in conformity with that
election.

2. DEFERRED PAYMENT ACCOUNT. Each deferred retainer or fee shall be credited at
the time when it otherwise would have been payable to an account to be
established in the name of the Director on the books of the Fund (the "Deferred
Payment Account") adjusted for notional investment experience as hereinafter
described.

3. RETURN ON DEFERRED PAYMENT ACCOUNT BALANCE. (a) For purposes of measuring the
investment return on his Deferred Payment Account, the Director may elect to
have the aggregate amount of his deferred compensation (or a specified portion
thereof) receive a return (i) at a rate equal to the return earned on
three-month U.S. Treasury Bills at the beginning of each calendar quarter (the
"Treasury Bill Rate") and such interest shall be credited to the account
quarterly at the end of each calendar quarter, or (ii) at a rate of return
(positive or negative) equal to the rate of return on the shares of any of the
registered investment companies managed by J. & W. Seligman & Co. Incorporated
("Seligman") or any other entity controlling, controlled by, or under common
control with (as such terms are defined in the Investment Company Act of 1940)
Seligman (each, a "Notional Fund"), assuming reinvestment of dividends and
distributions from the Notional Funds. (b) A Director may amend his designation
of investment return as of the end of each calendar quarter by giving written
notice to the President of the Fund at least 30 days prior to the end of such
calendar quarter. A timely change to a Director's designation of investment
return shall become effective on the first day of the calendar quarter following
receipt by the President of the Fund (the "President").

4. NOTIONAL INVESTMENT EXPERIENCE. Amounts credited to a Deferred Payment
Account shall be periodically adjusted for notional investment experience. In
each case such notional investment experience shall be determined by treating
the Deferred Payment Account as though an equivalent dollar amount had been
invested and reinvested in one or more of the Notional Funds. The Notional Funds
used as a basis for determining notional investment experience with respect to
any Director's Deferred Payment Account shall be designated by the Director in
writing by instrument of election substantially in the form attached hereto as
Exhibit C and may be changed prospectively by similar written election effective
as of the first day of any calendar quarter. The President may from time to time
limit the Notional Funds available for purposes of such election. If at any time
any Notional Fund that has previously been
                                                                          (3/98)

<PAGE>

designated by a Director as a notional investment shall cease to exist or shall
be unavailable for any reason, or if the Director fails to designate one or more
Notional Funds pursuant to this Section 4, the President may, at his discretion
and upon notice to the Director, treat any amounts notionally invested in such
Notional Fund (whether representing past amounts credited to a Director's
Deferred Payment Account or subsequent fee deferrals or both) as having been
invested at the Treasury Bill Rate, only until such time as the Director shall
have made another investment election in accordance with the foregoing
procedures. Deferred Payment Accounts shall continue to be adjusted for notional
investment experience until distributed in full in accordance with the
distribution method elected by the Director pursuant to Section 5 hereof.

5. PAYMENT OF DEFERRED AMOUNTS. All amounts credited to an account pursuant to
any election by the Director made as provided in Section 1 hereof shall be paid
to the Director

         (a)      in, or beginning in, the calendar year following the calendar
                  year in which the Director ceases to be a Director of the
                  Fund, or

         (b)      in, or beginning in, the calendar year following the earlier
                  of the calendar year in which the Director ceases to be a
                  Director of the Fund or attains age 70,

                  and shall be paid

         (c)      in a lump sum payable on the first day of the calendar year in
                  which payment is to be made, or

         (d)      in 10 or fewer installments, payable on the first day of each
                  year commencing with the calendar year in which payment is to
                  begin, all as the Director shall specify in making the
                  election. If the payment is to be made in installments, the
                  amount of each installment shall be equal to a fraction of the
                  total of the amounts in the account at the date of the payment
                  the numerator of which shall be one and the denominator of
                  which shall be the then remaining number of unpaid
                  installments (including the installment then to be paid). If
                  the Director dies at any time before all amounts in the
                  account have been paid, such amounts shall be paid at that
                  time in a lump sum to the beneficiary or beneficiaries
                  designated by the Director in writing to receive such payments
                  or in the absence of such a designation to the estate of the
                  Director.

The Board of Directors  may, in the case of an  unforseeable  emergency,  at its
sole  discretion  accelerate  the  payment of any  unpaid  amount for any or all
Directors.  For purposes of this paragraph,  an unforseeable emergency is severe
financial  hardship  to the  Director  resulting  from a sudden  and  unexpected
illness or  accident of the  Director  or of a dependent  (as defined in section
152(a) of the Internal  Revenue  Code) of the Director,  loss of the  Director's
property  due to  casualty,  or other  similar  extraordinary  and  unforseeable
circumstances  arising as a result of events beyond the control of the Director.
Payment due to an unforseeable emergency may not be made to the extent that such
hardship is or may be relieved  (i) through  reimbursement  or  compensation  by
insurance or otherwise;  (ii) by liquidation of the  Director's  assets,  to the
extent the  liquidation  of such assets would not itself cause severe  financial
hardship,  or (iii) by cessation of deferrals  under the Plan.  Examples of what
are not  considered to be  unforseeable  emergencies  include the need to send a
Director's  child to college or the desire to  purchase a home.
                                                                         (3/98)

<PAGE>

Withdrawals of amounts because of an unforseeable emergency are only permitted
to the extent reasonably necessary to satisfy the emergency need.

6. ASSIGNMENT. No deferred amount or unpaid portion thereof may be assigned or
transferred by the Director except by will or the laws of descent and
distribution.

7. WITHHOLDING TAXES. The Fund shall deduct from all payments any federal, state
or local taxes and other charges required by law to be withheld with respect to
such payments.

8. NATURE OF RIGHTS; NONALIENATION. A Director's rights to deferred payment
under the Plan shall be solely those of an unsecured general creditor of the
Fund, and any payments by the Fund pursuant to the Plan will be made solely from
the Fund's general assets and property. The Fund will be under no obligation to
purchase, hold or dispose of any investment for the specific benefit of any
Director but, if the Fund should choose to purchase shares of any Notional Fund
in order to cover all or a portion of its obligations under the Plan, then such
investments will continue to be a part of the general assets and property of the
Fund. A Director's rights under the Plan may not be transferred, assigned,
pledged or otherwise alienated, and any attempt by the Director to do so shall
be null and void.

9. STATUS OF DIRECTOR. Nothing in the Plan nor any election hereunder shall be
construed as conferring on any Director the right to remain a Director of the
Fund or to receive fees at any particular rate.

10. AMENDMENT AND ACCELERATION. The Board of Directors may at any time at its
sole discretion amend or terminate this Plan, provided that no such amendment or
termination shall adversely affect the right of Directors to receive deferred
amounts credited to their account.

11. ADMINISTRATION. The Plan shall be administered by the President or by such
person or persons as the President may designate to carry out administrative
functions hereunder. The President shall have complete discretion to interpret
and administer the Plan in accordance with its terms, and his determinations
shall be binding on all persons.


Amended as of March 19, 1998
                                                                         (3/98)

<PAGE>

                                                                      EXHIBIT A

                          SELIGMAN INVESTMENT COMPANIES

                           DEFERRED COMPENSATION PLAN
                                  ELECTION FORM

         Pursuant to the Deferred Compensation Plan for Directors, as amended as
of March 19, 1998, (the "Plan") adopted by each of the Seligman Investment
Companies (the "Funds"), I hereby elect to have ___% of my annual retainer fees
and ___% of my meeting fees for service to the Funds deferred as provided in the
Plan. This election will take effect at such time as is provided in section 1 of
the Plans, and shall continue in effect until terminated in writing, any such
termination to take effect of the first day of the next calendar year beginning
after receipt of the notice of termination.

         The Deferred Compensation Plan Return Designation Form attached hereto
indicates the percentage of each of the above amounts that should earn the
designated returns. Such designations shall remain in effect until changed by
submission of a new form as provided in the Plan.

         All amounts deferred with respect to any Fund and the earnings thereon
made pursuant to any election by me shall be credited to an account for my
benefit and shall be paid to me:

        CHECK (a) OR (b)
                    (a) in, or beginning in, the calendar year following the
                        calendar year in which I cease to be a director of the
        ------          Fund, or

                           
                    (b) in, or beginning in, the calendar year following the
                        earlier of the calendar year in which I cease to be a
        ------          director of the Fund or attain age 70,

                        and shall be paid

        CHECK (c) OR (d)
                    (c) in a lump sum payable on the first day of the calendar
        ------          year in which payment is to be made, or

                    (d) in 10 or fewer installments, payable on the first day of
                        each year commencing with the calendar year in which
        ------          payment is to begin.

         IF (d) IS SELECTED, ENTER NUMBER OF ANNUAL INSTALLMENTS _________.

         If the payment is to be made in installments, the amount of each
installment shall be equal to a fraction of the total of the amounts in the
account at the date of the payment the numerator of which shall be one and the
denominator of which shall be the then remaining number of unpaid installments
(including the installment then to be paid). If I die at any time before all
amounts in the account have been paid, such amounts shall be paid at that time
in a lump sum to the beneficiary or beneficiaries designated by me on the
attached Beneficiary Designation Form or in the absence of such a designation to
my estate.


- --------------------------------         --------------------------------------
Date                                     Signature
                                                                         (3/98)

<PAGE>
                                                                      EXHIBIT B

                           DEFERRED COMPENSATION PLAN
                          BENEFICIARY DESIGNATION FORM

I hereby  designate the following  beneficiary or beneficiaries to receive at my
death the amounts held in my Deferred  Payment Accounts from my participation in
the  Deferred  Compensation  Plans  for  Directors/Trustees  of  all  registered
investment  companies advised by J. & W. Seligman & Co. Incorporated for which I
serve as a director or trustee (the "Plans").

A.       PRIMARY BENEFICIARY(IES)

1.       Name:                              % Share:
              -----------------------------         ----------------------------

         Address:
                 ---------------------------------------------------------------

         Relationship:            DOB:        Social Security #:
                      ----------      -------                   ----------------

         Trustee Name and Date (if beneficiary is a trust):
                                                           ---------------------

         Trustee of Trust:
                          ------------------------------------------------------

2.       Name:                              % Share:                            
              -----------------------------         ----------------------------
                                                                                
         Address:                                                               
                 ---------------------------------------------------------------
                                                                                
         Relationship:            DOB:        Social Security #:                
                      ----------      -------                   ----------------
                                                                                
         Trustee Name and Date (if beneficiary is a trust):                     
                                                           ---------------------
                                                                                
         Trustee of Trust:                                                      
                          ------------------------------------------------------


B.       CONTINGENT BENEFICIARY(IES)

1.       Name:                              % Share:
              -----------------------------         ----------------------------

         Address:
                 ---------------------------------------------------------------

         Relationship:            DOB:        Social Security #:
                      ----------      -------                   ----------------

         Trustee Name and Date (if beneficiary is a trust):
                                                           ---------------------

         Trustee of Trust:
                          ------------------------------------------------------

2.       Name:                              % Share:                            
              -----------------------------         ----------------------------
                                                                                
         Address:                                                               
                 ---------------------------------------------------------------
                                                                                
         Relationship:            DOB:        Social Security #:                
                      ----------      -------                   ----------------
                                                                                
         Trustee Name and Date (if beneficiary is a trust):                     
                                                           ---------------------
                                                                                
         Trustee of Trust:                                                      
                          ------------------------------------------------------
<PAGE>

I understand that I may revoke or amend the above designation at any time. I
understand that payment will be made to my Contingent Beneficiary(ies) only if
there is no surviving Primary Beneficiary(ies). I further understand that if I
am not survived by any Primary or Contingent Beneficiaries, payment will be made
to my estate as set forth under the Plans.


- --------------------------------          --------------------------------------
Date                                      Signature


                                          --------------------------------------
                                          Participant's Name Printed

<PAGE>
                                                                      EXHIBIT C

                          SELIGMAN INVESTMENT COMPANIES
                           DEFERRED COMPENSATION PLANS
                             RETURN DESIGNATION FORM

I elect to have my deferred compensation for all registered investment companies
advised by J. & W. Seligman & Co. Incorporated for which I serve as a Director
or Trustee deemed to be invested as specified below:

<TABLE>
<CAPTION>
- ------------------------------------------------------- --------------- ---------------
                                                                         % Allocation
                                                        % Allocation    for accumulated
                                                        for future fees     balances
- ------------------------------------------------------- --------------- ---------------
<S>                                                     <C>             <C>
At the prevailing three-month U.S. Treasury Bill Rate
- ------------------------------------------------------- --------------- ---------------
Seligman Capital Fund, Inc.
- ------------------------------------------------------- --------------- ---------------
Seligman Cash Management Fund, Inc.
- ------------------------------------------------------- --------------- ---------------
Seligman Common Stock Fund, Inc.
- ------------------------------------------------------- --------------- ---------------
Seligman Communications and Information Fund, Inc.
- ------------------------------------------------------- --------------- ---------------
Seligman Frontier Fund, Inc.
- ------------------------------------------------------- --------------- ---------------
Seligman Growth Fund, Inc.
- ------------------------------------------------------- --------------- ---------------
Seligman Henderson Global Fund Series, Inc. -
 Seligman Henderson Emerging Markets Growth Fund
- ------------------------------------------------------- --------------- ---------------
Seligman Henderson Global Fund Series, Inc. -
 Seligman Henderson Global Growth Opportunities Fund
- ------------------------------------------------------- --------------- ---------------
Seligman Henderson Global Fund Series, Inc. -
 Seligman Henderson Global Smaller Companies Fund
- ------------------------------------------------------- --------------- ---------------
Seligman Henderson Global Fund Series, Inc. -
 Seligman Henderson Global Technology Fund
- ------------------------------------------------------- --------------- ---------------
Seligman Henderson Global Fund Series, Inc. -
 Seligman Henderson International Fund
- ------------------------------------------------------- --------------- ---------------
Seligman High Income Fund Series -
 Seligman High-Yield Bond Series
- ------------------------------------------------------- --------------- ---------------
Seligman High Income Fund Series -
 Seligman U.S. Government Securities Series
- ------------------------------------------------------- --------------- ---------------
Seligman Income Fund, Inc.
- ------------------------------------------------------- --------------- ---------------
Seligman Value Fund Series, Inc. -
 Seligman Large-Cap Value Fund
- ------------------------------------------------------- --------------- ---------------
Seligman Value Fund Series, Inc. -
 Seligman Small-Cap Value Fund
- ------------------------------------------------------- --------------- ---------------
Tri-Continental Corporation
- ------------------------------------------------------- --------------- ---------------
Total                                                         100%           100%
- ------------------------------------------------------- --------------- ---------------


</TABLE>


         I acknowledge that I may amend this Return Designation in the manner,
and at such time as permitted, under the Plans. Furthermore, I acknowledge that
in certain circumstances, and pursuant to Section 4 of the Plans, the President
may at his discretion, and upon notice to me, disregard the designations made
above and cause all or a portion of my Deferred Account to receive a return
equal to the prevailing three-month U.S. Treasury Bill Rate.


- ---------------------------                   ----------------------------------
Date                                          Signature







CONSENT OF INDEPENDENT AUDITORS

Seligman High Income Fund Series:

We consent to the use in Post-Effective Amendment No. 24 to Registration
Statement No. 2-93076 of our report dated January 30, 1998, appearing in the
Annual Report to Shareholders for the year ended December 31, 1997, which is
incorporated by reference in the Statement of Additional Information, which is
included in such Registration Statement, and to the references to us under the
captions "Financial Highlights" in the Prospectus and "General Information" in
the Statement of Additional Information, which are also included in such
Registration Statement.

DELOITTE & TOUCHE LLP
New York, New York
April 24, 1998





                                POWER OF ATTORNEY



KNOW ALL MEN BY THESE PRESENTS,  that the undersigned  director of SELIGMAN HIGH
INCOME FUND SERIES, a Massachusetts  Business Trust, which proposes to file with
the Securities and Exchange Commission an Amendment to Registration Statement on
Form N-1A and further amendments thereto, as necessary, under the Securities Act
of 1933 and the Investment  Company Act of 1940, as amended,  hereby constitutes
and appoints William C. Morris and Brian T. Zino, and each of them individually,
his   attorneys-in-fact   and  agent,   with  full  power  of  substitution  and
resubstitution,  for in his name and stead, in his capacity as such director, to
sign and file such  Amendment to  Registration  Statement or further  amendments
thereto,  and any and all  applications  or other documents to be filed with the
Securities  and  Exchange  Commission  pertaining  thereto,  with full power and
authority to do and perform all acts and things  requisite  and  necessary to be
done on the premises.

Executed this 1st day of April, 1998.




                                          /s/ RICHARD R. SCHMALTZ    (L.S.)
                                          --------------------------------------
                                              Richard R. Schmaltz


<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
   <NUMBER> 031
   <NAME> SELIGMAN HIGH-YIELD BOND SERIES CL. A
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                  12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               DEC-31-1997
<INVESTMENTS-AT-COST>                          1752627
<INVESTMENTS-AT-VALUE>                         1822454
<RECEIVABLES>                                    58418
<ASSETS-OTHER>                                    2499
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 1883371
<PAYABLE-FOR-SECURITIES>                          2306
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        14371
<TOTAL-LIABILITIES>                              16677
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       1789217
<SHARES-COMMON-STOCK>                            99415<F1>
<SHARES-COMMON-PRIOR>                            56292<F1>
<ACCUMULATED-NII-CURRENT>                         2353
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                           5297
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         69827
<NET-ASSETS>                                    750461<F1>
<DIVIDEND-INCOME>                                 2397<F1>
<INTEREST-INCOME>                                57798<F1>
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  (6482)<F1>
<NET-INVESTMENT-INCOME>                          53713<F1>
<REALIZED-GAINS-CURRENT>                          8664
<APPREC-INCREASE-CURRENT>                        47952
<NET-CHANGE-FROM-OPS>                           175385
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (52770)<F1>
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          68525<F1>
<NUMBER-OF-SHARES-REDEEMED>                    (29178)<F1>
<SHARES-REINVESTED>                               3776<F1>
<NET-CHANGE-IN-ASSETS>                         1044892
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                       (3367)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             3570<F1>
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   6482<F1>
<AVERAGE-NET-ASSETS>                            569722<F1>
<PER-SHARE-NAV-BEGIN>                             7.25<F1>
<PER-SHARE-NII>                                    .70<F1>
<PER-SHARE-GAIN-APPREC>                            .28<F1>
<PER-SHARE-DIVIDEND>                             (.68)<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               7.55<F1>
<EXPENSE-RATIO>                                   1.14<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>Class A only.  All other data are fund level.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
   <NUMBER> 032
   <NAME> SELIGMAN HIGH-YIELD BOND SERIES CL. B
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                  12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               DEC-31-1997
<INVESTMENTS-AT-COST>                          1752627
<INVESTMENTS-AT-VALUE>                         1822454
<RECEIVABLES>                                    58418
<ASSETS-OTHER>                                    2499
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 1883371
<PAYABLE-FOR-SECURITIES>                          2306
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        14371
<TOTAL-LIABILITIES>                              16677
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       1789217
<SHARES-COMMON-STOCK>                            76978<F1>
<SHARES-COMMON-PRIOR>                            20394<F1>
<ACCUMULATED-NII-CURRENT>                         2353
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                           5297
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         69827
<NET-ASSETS>                                    581235<F1>
<DIVIDEND-INCOME>                                 1487<F1>
<INTEREST-INCOME>                                35853<F1>
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  (6708)<F1>
<NET-INVESTMENT-INCOME>                          30632<F1>
<REALIZED-GAINS-CURRENT>                          8664
<APPREC-INCREASE-CURRENT>                        47952
<NET-CHANGE-FROM-OPS>                           175385
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (29875)<F1>
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          61362<F1>
<NUMBER-OF-SHARES-REDEEMED>                     (6604)<F1>
<SHARES-REINVESTED>                               1826<F1>
<NET-CHANGE-IN-ASSETS>                         1044892
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                       (3367)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             2191<F1>
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   6708<F1>
<AVERAGE-NET-ASSETS>                            353535<F1>
<PER-SHARE-NAV-BEGIN>                             7.26<F1>
<PER-SHARE-NII>                                    .64<F1>
<PER-SHARE-GAIN-APPREC>                            .28<F1>
<PER-SHARE-DIVIDEND>                             (.63)<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               7.55<F1>
<EXPENSE-RATIO>                                   1.90<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>Class B only.  All other data are fund level.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
   <NUMBER> 034
   <NAME> SELIGMAN HIGH-YIELD BOND SERIES CL. D
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                  12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               DEC-31-1997
<INVESTMENTS-AT-COST>                          1752627
<INVESTMENTS-AT-VALUE>                         1822454
<RECEIVABLES>                                    58418
<ASSETS-OTHER>                                    2499
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 1883371
<PAYABLE-FOR-SECURITIES>                          2306
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        14371
<TOTAL-LIABILITIES>                              16677
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       1789217
<SHARES-COMMON-STOCK>                            70847<F1>
<SHARES-COMMON-PRIOR>                            36597<F1>
<ACCUMULATED-NII-CURRENT>                         2353
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                           5297
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         69827
<NET-ASSETS>                                    534998<F1>
<DIVIDEND-INCOME>                                 1670<F1>
<INTEREST-INCOME>                                40292<F1>
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  (7538)<F1>
<NET-INVESTMENT-INCOME>                          34424<F1>
<REALIZED-GAINS-CURRENT>                          8664
<APPREC-INCREASE-CURRENT>                        47952
<NET-CHANGE-FROM-OPS>                           175385
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (33771)<F1>
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          44411<F1>
<NUMBER-OF-SHARES-REDEEMED>                    (12966)<F1>
<SHARES-REINVESTED>                               2805<F1>
<NET-CHANGE-IN-ASSETS>                         1044892
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                       (3367)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             2487<F1>
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   7538<F1>
<AVERAGE-NET-ASSETS>                            397502<F1>
<PER-SHARE-NAV-BEGIN>                             7.26<F1>
<PER-SHARE-NII>                                    .64<F1>
<PER-SHARE-GAIN-APPREC>                            .28<F1>
<PER-SHARE-DIVIDEND>                             (.63)<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               7.55<F1>
<EXPENSE-RATIO>                                   1.90<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>Class D only.  All other data are fund level.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
   <NUMBER> 011
   <NAME> SELIGMAN U.S.GOVERNMENT SECURITIES CLASS A
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                  12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               DEC-31-1997
<INVESTMENTS-AT-COST>                            60292   
<INVESTMENTS-AT-VALUE>                           62555
<RECEIVABLES>                                      808
<ASSETS-OTHER>                                      50
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   63413
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         2418
<TOTAL-LIABILITIES>                               2418
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         72991
<SHARES-COMMON-STOCK>                             6606<F1>
<SHARES-COMMON-PRIOR>                             6984<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                        (14259)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                          2263
<NET-ASSETS>                                     45426<F1>
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                 3067<F1>
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                   (544)<F1>
<NET-INVESTMENT-INCOME>                           2523<F1>
<REALIZED-GAINS-CURRENT>                         (612)
<APPREC-INCREASE-CURRENT>                         1950
<NET-CHANGE-FROM-OPS>                             4351
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       (2523)<F1>
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                           2402<F1>
<NUMBER-OF-SHARES-REDEEMED>                     (2983)<F1>
<SHARES-REINVESTED>                                203<F1>
<NET-CHANGE-IN-ASSETS>                            4823
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                      (15178)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              222<F1>
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    544<F1>
<AVERAGE-NET-ASSETS>                             44386<F1>
<PER-SHARE-NAV-BEGIN>                             6.71<F1>
<PER-SHARE-NII>                                    .38<F1>
<PER-SHARE-GAIN-APPREC>                            .17<F1>
<PER-SHARE-DIVIDEND>                             (.38)<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               6.88<F1>
<EXPENSE-RATIO>                                   1.23<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>Class A only.  All other data are fund level.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
   <NUMBER> 012
   <NAME> SELIGMAN U.S.GOVERNMENT SECURITIES CLASS B
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                  12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               DEC-31-1997
<INVESTMENTS-AT-COST>                            60292   
<INVESTMENTS-AT-VALUE>                           62555
<RECEIVABLES>                                      808
<ASSETS-OTHER>                                      50
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   63413
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         2418
<TOTAL-LIABILITIES>                               2418
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         72991
<SHARES-COMMON-STOCK>                              467<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                        (14259)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                          2263
<NET-ASSETS>                                      3219<F1>
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                   63<F1>
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    (18)<F1>
<NET-INVESTMENT-INCOME>                             45<F1>
<REALIZED-GAINS-CURRENT>                         (612)
<APPREC-INCREASE-CURRENT>                         1950
<NET-CHANGE-FROM-OPS>                             4351
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         (45)<F1>
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                            757<F1>
<NUMBER-OF-SHARES-REDEEMED>                      (295)<F1>
<SHARES-REINVESTED>                                  5<F1>
<NET-CHANGE-IN-ASSETS>                            4823
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                      (15178)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                                5<F1>
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                     19<F1>
<AVERAGE-NET-ASSETS>                               947<F1>
<PER-SHARE-NAV-BEGIN>                             6.73<F1>
<PER-SHARE-NII>                                    .33<F1>
<PER-SHARE-GAIN-APPREC>                            .16<F1>
<PER-SHARE-DIVIDEND>                             (.33)<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               6.89<F1>
<EXPENSE-RATIO>                                   2.01<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>Class B only.  All other data are fund level.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
   <NUMBER> 014
   <NAME> SELIGMAN U.S.GOVERNMENT SECURITIES CLASS D
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                  12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               DEC-31-1997
<INVESTMENTS-AT-COST>                            60292   
<INVESTMENTS-AT-VALUE>                           62555
<RECEIVABLES>                                      808
<ASSETS-OTHER>                                      50
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   63413
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         2418
<TOTAL-LIABILITIES>                               2418
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         72991
<SHARES-COMMON-STOCK>                             1793<F1>
<SHARES-COMMON-PRIOR>                             1380<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                        (14259)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                          2263
<NET-ASSETS>                                     12350<F1>
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                  628<F1>
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                   (183)<F1>
<NET-INVESTMENT-INCOME>                            445<F1>
<REALIZED-GAINS-CURRENT>                         (612)
<APPREC-INCREASE-CURRENT>                         1950
<NET-CHANGE-FROM-OPS>                             4351
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        (445)<F1>
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                           1790<F1>
<NUMBER-OF-SHARES-REDEEMED>                     (1420)<F1>
<SHARES-REINVESTED>                                 43<F1>
<NET-CHANGE-IN-ASSETS>                            4823
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                      (15178)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                               45<F1>
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    183<F1>
<AVERAGE-NET-ASSETS>                              9064<F1>
<PER-SHARE-NAV-BEGIN>                             6.73<F1>
<PER-SHARE-NII>                                    .33<F1>
<PER-SHARE-GAIN-APPREC>                            .16<F1>
<PER-SHARE-DIVIDEND>                             (.33)<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               6.89<F1>
<EXPENSE-RATIO>                                   2.01<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>Class D only.  All other data are fund level.
</FN>
        

</TABLE>


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