SELIGMAN PORTFOLIOS INC/NY
485APOS, 1998-02-13
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                                                               File No. 33-15253
                                                                        811-5221

                       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.   21                               /x/
                                       ---
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940          /x/
         Amendment No.  23                                               /x/
                        --
    


- --------------------------------------------------------------------------------
                            SELIGMAN PORTFOLIOS, INC.
               (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):


/ / 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)

   
/x/ 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 which will be filed with the Commission on
or about March 20, 1998.
    

<PAGE>

                            SELIGMAN PORTFOLIOS, INC.

   
                   100 Park Avenue o New York, New York 10017
       Toll-Free Telephone: (800) 221-7844 all continental United States
                     New York City Telephone:(212) 850-1864
            Marketing Services--Toll-Free Telephone: (800) 221-2783

                                                                     May 1, 1998


Seligman  Portfolios,  Inc. (the "Fund") is an open-end  diversified  management
investment   company   consisting   of   fourteen   separate   portfolios   (the
"Portfolios"),  each designed to meet  different  investment  goals.  Investment
management  services for each of the Fund's  Portfolios  are provided by J. & W.
Seligman & Co. Incorporated (the
                                                           (continued on page 2)

     The Fund's fourteen Portfolios are:
    

     //   SELIGMAN BOND PORTFOLIO:  seeks favorable  current income by investing
          in a diversified portfolio of debt securities, primarily of investment
          grade, including convertible issues and preferred stocks, with capital
          appreciation as a secondary consideration.

     //   SELIGMAN CAPITAL PORTFOLIO: seeks to produce capital appreciation, not
          current income,  by investing in common stocks  (primarily  those with
          strong near or intermediate-term prospects) and securities convertible
          into or  exchangeable  for common  stocks,  in common  stock  purchase
          warrants  and  rights,  in debt  securities  and in  preferred  stocks
          believed to provide capital appreciation opportunities.

     //   SELIGMAN CASH MANAGEMENT  PORTFOLIO:  seeks to preserve capital and to
          maximize  liquidity  and current  income by investing in a diversified
          portfolio of  high-quality  money market  instruments.  INVESTMENTS IN
          THIS  PORTFOLIO  ARE  NEITHER  INSURED  NOR  GUARANTEED  BY  THE  U.S.
          GOVERNMENT  AND THERE IS NO ASSURANCE THAT THIS PORTFOLIO WILL BE ABLE
          TO MAINTAIN A STABLE NET ASSET VALUE OF $1.00 PER SHARE.

     //   SELIGMAN COMMON STOCK PORTFOLIO: seeks favorable, but not the highest,
          current  income and long-term  growth of both income and capital value
          without  exposing  capital to undue  risk,  primarily  through  equity
          investments broadly diversified over a number of industries.

     //   SELIGMAN COMMUNICATIONS AND INFORMATION PORTFOLIO: seeks capital gain,
          not income,  by investing  primarily in securities of companies in the
          communications, information and related industries.

     //   SELIGMAN FRONTIER PORTFOLIO: seeks growth in capital value; income may
          be  considered  but  will  be  only   incidental  to  the  Portfolio's
          investment  objective.  In general,  securities owned are likely to be
          those  issued by small to  medium-sized  companies  selected for their
          growth prospects.

     //   SELIGMAN  HENDERSON GLOBAL GROWTH  OPPORTUNITIES  PORTFOLIO:  seeks to
          achieve its objective of long-term  capital  appreciation by investing
          primarily in equity securities of companies that have the potential to
          benefit from global economic or social trends.

     //   SELIGMAN HENDERSON GLOBAL SMALLER COMPANIES PORTFOLIO: seeks long-term
          capital   appreciation   primarily   through  global   investments  in
          securities of companies with small to medium market capitalization.

     //   SELIGMAN  HENDERSON  GLOBAL  TECHNOLOGY  PORTFOLIO:   seeks  long-term
          capital  appreciation by making global  investments of at least 65% of
          its assets in  securities  of companies  with  business  operations in
          technology and technology-related industries.

     //   SELIGMAN HENDERSON  INTERNATIONAL  PORTFOLIO:  seeks long-term capital
          appreciation primarily through international investments in securities
          of medium- to large-sized companies.

     //   SELIGMAN  HIGH-YIELD BOND PORTFOLIO:  seeks to produce maximum current
          income by investing  primarily in  high-yielding,  high risk corporate
          bonds and corporate notes,  which,  generally,  are non-rated or carry
          ratings  lower than those  assigned to  investment  grade  bonds.  THE
          PORTFOLIO  WILL INVEST UP TO 100% OF ITS ASSETS 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  THIS  PORTFOLIO.   SEE   "INVESTMENT   OBJECTIVES  AND
          POLICIES--SELIGMAN HIGH-YIELD BOND PORTFOLIO."

     //   SELIGMAN  INCOME  PORTFOLIO:  seeks  primarily to produce high current
          income  consistent with what is believed to be prudent risk of capital
          and  secondarily  to provide the  possibility of improvement in income
          and capital  value over the longer  term,  by  investing  primarily in
          income-producing securities.

   
     //   SELIGMAN  LARGE-CAP  VALUE  PORTFOLIO:  seeks capital  appreciation by
          investing  primarily  in equity  securities  of  companies  with large
          market  capitalizations deemed to be value companies by the investment
          manager.

     //   SELIGMAN  SMALL-CAP  VALUE  PORTFOLIO:  seeks capital  appreciation by
          investing  primarily  in equity  securities  of  companies  with small
          market  capitalizations deemed to be value companies by the investment
          manager.
    

<TABLE>
<CAPTION>
 <S><C>
 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.
</TABLE>

<PAGE>


(continued from page 1)

"Manager").   Seligman   Henderson  Co.  supervises  and  directs  the  non-U.S.
investments of the Seligman  Henderson  Global Growth  Opportunities  Portfolio,
Seligman Henderson Global Smaller Companies Portfolio, Seligman Henderson Global
Technology   Portfolio   and   Seligman   Henderson    International   Portfolio
(collectively, the "Seligman Henderson Portfolios").

     Shares of the Fund are  currently  provided  as the  investment  medium for
Canada Life of America  Variable  Annuity Account 1 ("CLAVA-1"),  Canada Life of
America Variable  Annuity Account 2 ("CLAVA-2"),  Canada Life of America Annuity
Account 2  ("CLAA-2"),  Canada  Life of America  Annuity  Account 3  ("CLAA-3"),
Canada Life of New York Variable  Annuity Account 1 ("CLNYVA-1") and Canada Life
of New York Variable Annuity Account 2 ("CLNYVA-2") (collectively,  "Canada Life
Accounts"),  each of which is a separate account of either Canada Life Insurance
Company of America or Canada Life Insurance Company of New York,  (collectively,
"Canada Life").  Shares of certain  Portfolios of the Fund may not be offered to
all Canada  Life  Accounts.  Shares of the  Seligman  Bond  Portfolio,  Seligman
Capital  Portfolio,  Seligman Cash Management  Portfolio,  Seligman Common Stock
Portfolio and Seligman  Income  Portfolio  are also  provided as the  investment
medium for Mutual Benefit Variable Contract Account-9  ("VCA-9")  established by
MBL Life  Assurance  Corporation  (formerly,  The Mutual  Benefit Life Insurance
Company) ("MBL Life").

     CLAVA-1,  CLAVA-2,  CLNYVA-1  and CLNYVA-2  are each  registered  as a unit
investment  trust under the Investment  Company Act of 1940 (the "1940 Act") and
fund  variable  annuity  contracts  ("VA  Contracts")  issued by Canada Life and
distributed  by  Seligman  Financial  Services,  Inc.  CLAA-2 and CLAA-3 are not
registered or regulated under the 1940 Act in reliance on the exemption provided
in Section  3(c)(11) of the 1940 Act.  CLAA-2 and CLAA-3 fund annuity  contracts
("CLAA  Contracts")  issued by Canada Life and distributed by Seligman Financial
Services, Inc. which may be purchased only by pension or profit-sharing employee
benefit  plans that  satisfy the  requirements  for  qualification  set forth in
Section 401 of the Internal  Revenue Code of 1986. VCA-9 is registered as a unit
investment trust under the 1940 Act and funds variable annuity contracts ("VCA-9
Contracts") issued by MBL Life.

     This  Prospectus sets forth  concisely  information  about the Fund and its
Portfolios that a prospective investor should know before investing. Please read
it  carefully  before you invest  and keep it for future  reference.  Additional
information about the Fund, including a Statement of Additional Information, has
been  filed  with the  Securities  and  Exchange  Commission  (the  "SEC").  The
Statement of Additional Information is available upon request and without charge
by calling or writing  the Fund at the  telephone  numbers or 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.



                                TABLE OF CONTENTS

                                                                            PAGE
                                                                            ----

Financial Highlights ..............................................         P-4
Investment Objectives and Policies ................................         P-8
Seligman Bond Portfolio ...........................................         P-8
Seligman Capital Portfolio ........................................         P-9
Seligman Cash Management Portfolio ................................         P-9
Seligman Common Stock Portfolio ...................................         P-10
Seligman Communications and Information Portfolio .................         P-11
Seligman Frontier Portfolio .......................................         P-11
Seligman Henderson Global Growth Opportunities Portfolio ..........         P-12
Seligman Henderson Global Smaller Companies Portfolio .............         P-12
Seligman Henderson Global Technology Portfolio ....................         P-12
Seligman Henderson International Portfolio ........................         P-12
Seligman High-Yield Bond Portfolio ................................         P-16
Seligman Income Portfolio .........................................         P-17
   
Seligman Large-Cap Value Portfolio ................................         P-18
Seligman Small-Cap Value Portfolio ................................         P-18
    
Other Investment Policies .........................................         P-19
Management Services ...............................................         P-22
Portfolio Transactions, Portfolio Turnover And Valuation ..........         P-26
Dividends, Distributions and Taxes ................................         P-27
Purchases and Redemptions .........................................         P-27
Custodians and Transfer Agent .....................................         P-27
Organization and Capitalization ...................................         P-27
Appendix ..........................................................         P-28

                                      P-2

<PAGE>










                      THIS PAGE INTENTIONALLY LEFT BLANK












<PAGE>
                              FINANCIAL HIGHLIGHTS

   
     The following tables set forth selected data for the periods  indicated for
a single share  outstanding of each of the Fund's  Portfolios  (except  Seligman
Large-Cap Value Portfolio and Seligman Small-Cap Value Portfolio,  each of which
commenced  operations on May 1, 1998). The results shown for all periods through
the year ended  December  31,  1997 have been  audited in  conjunction  with the
annual audits of the  financial  statements  of Seligman  Portfolios,  Inc. by ,
independent auditors, whose reports thereon are unqualified.  The 1997 financial
statements  and  independent   auditors'  report  thereon  are  incorporated  by
reference  in the Fund's  Statement  of  Additional  Information.  Copies of the
Statement of Additional Information may be obtained free of charge from the Fund
at the  telephone  numbers  or  address  provided  on the  cover  page  of  this
Prospectus.
     The per share operating  performance data is designed to allow investors to
trace the  operating  performance,  on a per  share  basis,  from a  Portfolio's
beginning  net asset value to its ending net asset value so that  investors  may
understand what effect the individual items have on their  investment,  assuming
it was held throughout the period.  

<TABLE>
<CAPTION>

                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                    INCREASE                                                        
                            NET ASSET       NET     NET REALIZED   (DECREASE)                              NET INCREASE  
                            VALUE AT    INVESTMENT  & UNREALIZED     FROM                 DISTRIBUTIONS     (DECREASE)   NET ASSET 
PER SHARE OPERATING         BEGINNING     INCOME     GAIN (LOSS)   INVESTMENT   DIVIDENDS   FROM NET      IN NET ASSET VALUE AT END
  PERFORMANCE:              OF PERIOD     (LOSS)   ON INVESTMENTS  OPERATIONS     PAID    GAIN REALIZED       VALUE     OF PERIOD
- -------------------         ---------   ---------- --------------  ----------   --------- -------------  -------------- ------------

<S>                         <C>           <C>         <C>          <C>          <C>          <C>           <C>          <C>         
BOND PORTFOLIO
  Year ended 12/31/97...... $ 9.890       $           $            $            $            $             $            $           
  Year ended 12/31/96......  10.440        0.565       (0.552)       0.013       (0.563)          --         (0.550)       9.890    
  Year ended 12/31/95 .....   9.270        0.605        1.171        1.776       (0.606)          --          1.170       10.440    
  Year ended 12/31/94......  10.110        0.499       (0.841)      (0.342)      (0.498)          --         (0.840)       9.270    
  Year ended 12/31/93......  10.660        0.713        0.142        0.855       (0.711)      (0.694)        (0.550)      10.110    
  Year ended 12/31/92......  10.990        0.706       (0.092)       0.614       (0.772)      (0.172)        (0.330)      10.660    
  Year ended 12/31/91......  10.310        0.798        0.699        1.497       (0.817)          --          0.680       10.990    
  Year ended 12/31/90......  10.220        0.680       (0.054)       0.626       (0.536)          --          0.090       10.310    
  Year ended 12/31/89......   9.930        0.658        0.208        0.866       (0.576)          --          0.290       10.220    
  6/21/88*-12/31/88........  10.000        0.262       (0.162)       0.100       (0.170)          --         (0.070)       9.930    

CAPITAL PORTFOLIO                                                                                                      
  Year ended 12/31/97......  16.010                                                                                    
  Year ended 12/31/96......  14.910        0.043        2.121        2.164       (0.042)      (1.022)         1.100       16.010    
  Year ended 12/31/95 .....  12.700        0.048        3.385        3.433       (0.047)      (1.176)         2.210       14.910    
  Year ended 12/31/94......  14.950        0.015       (0.699)      (0.684)      (0.018)      (1.548)        (2.250)      12.700    
  Year ended 12/31/93......  16.980        0.021        1.928        1.949       (0.021)      (3.958)        (2.030)      14.950    
  Year ended 12/31/92......  17.740       (0.022)       1.202        1.180           --       (1.940)        (0.760)      16.980    
  Year ended 12/31/91......  11.230        0.079        6.547        6.626       (0.088)      (0.028)         6.510       17.740    
  Year ended 12/31/90......  11.620        0.044       (0.414)      (0.370)      (0.020)          --         (0.390)      11.230    
  Year ended 12/31/89......  10.060       (0.084)       1.739        1.655           --       (0.095)         1.560       11.620    
  6/21/88*-12/31/88........  10.000        0.060           --        0.060           --           --          0.060       10.060    

CASH MANAGEMENT PORTFOLIO                                                                                              
  Year ended 12/31/97......   1.000                                                                                    
  Year ended 12/31/96......   1.000        0.053           --        0.053       (0.053)          --             --        1.000    
  Year ended 12/31/95 .....   1.000        0.055           --        0.055       (0.055)          --             --        1.000    
  Year ended 12/31/94......   1.000        0.040           --        0.040       (0.040)          --             --        1.000    
  Year ended 12/31/93......   1.000        0.030           --        0.030       (0.030)          --             --        1.000    
  Year ended 12/31/92......   1.000        0.035           --        0.035       (0.035)          --             --        1.000    
  Year ended 12/31/91......   1.000        0.056           --        0.056       (0.056)          --             --        1.000    
  Year ended 12/31/90......   1.000        0.075           --        0.075       (0.075)          --             --        1.000    
  Year ended 12/31/89......   1.000        0.075           --        0.075       (0.075)          --             --        1.000    
  6/21/88*-12/31/88........   1.000        0.020           --        0.020       (0.020)          --             --        1.000    

COMMON STOCK PORTFOLIO                                                                                                 
  Year ended 12/31/97......  15.920                                                                                    
  Year ended 12/31/96......  15.440        0.334        2.789        3.123       (0.336)      (2.307)         0.480       15.920    
  Year ended 12/31/95 .....  13.780        0.349        3.400        3.749       (0.345)      (1.744)         1.660       15.440    
  Year ended 12/31/94......  14.980        0.365       (0.356)       0.009       (0.385)      (0.824)        (1.200)      13.780    
  Year ended 12/31/93......  15.600        0.392        1.479        1.871       (0.394)      (2.097)        (0.620)      14.980    
  Year ended 12/31/92......  14.740        0.346        1.445        1.791       (0.369)      (0.562)         0.860       15.600    
  Year ended 12/31/91......  11.580        0.362        3.459        3.821       (0.355)      (0.306)         3.160       14.740    
  Year ended 12/31/90......  12.260        0.356       (0.743)      (0.387)      (0.263)      (0.030)        (0.680)      11.580    
  Year ended 12/31/89......  10.150        0.248        2.195        2.443       (0.179)      (0.154)         2.110       12.260    
  6/21/88*-12/31/88........  10.000        0.120        0.060        0.180       (0.030)          --          0.150       10.150    
                                                                                                                      
</TABLE>
- --------------
  * Commencement of operations.
 ** The Manager, at its discretion, waived its management fee and/or reimbursed 
    expenses for certain periods presented.
  + Annualized.
    

                                      P-4

<PAGE>

   
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 a Portfolio's  performance
assuming  investors  purchased  shares at net asset value as of the beginning of
the period,  reinvested dividends and capital gains paid at net asset value, and
then sold the  shares  at the net  asset  value per share on the last day of the
period.  The total  returns  exclude the effect of all  administration  fees and
asset-based  sales loads associated with variable annuity  contracts.  The total
returns for periods of less than one year are not annualized.
     "Average commission rate paid" represents the average commissions paid by a
Portfolio to purchase or sell securities. It is determined by dividing the total
commission  dollars paid by the number of shares  purchased  and sold during the
period for which commissions were paid.

<TABLE>
<CAPTION>
                                                                                                            WITHOUT MANAGEMENT
                                                                                                            FEE WAIVER AND/OR
                                                                                                          EXPENSE REIMBURSEMENT**
                                                                                                    --------------------------------
                                                     RATIOS/SUPPLEMENTAL DATA                                               RATIO
                                       -----------------------------------------------------------                          OF NET
                             TOTAL                   NET                                NET ASSETS              RATIO OF  INVESTMENT
                             RETURN    EXPENSES   INVESTMENT                                AT         NET      EXPENSES    INCOME
                            BASED ON     TO         INCOME                                END OF    INVESTMENT    TO      (LOSS) TO
                              NET      AVERAGE      (LOSS)                   AVERAGE     PERIOD      INCOME     AVERAGE    AVERAGE
PER SHARE OPERATING          ASSET       NET      TO AVERAGE   PORTFOLIO   COMMISSION     (000s       (LOSS)      NET         NET 
  PERFORMANCE:               VALUE     ASSETS     NET ASSETS   TURNOVER     RATE PAID    OMITTED)    PER SHARE   ASSETS     ASSETS
- -------------------         --------   --------   ----------   ---------   ----------   ----------  ----------  --------  ----------
<S>                          <C>       <C>           <C>        <C>          <C>         <C>           <C>       <C>         <C>
BOND PORTFOLIO                                                                                                                     
  Year ended 12/31/97......       %          %            %           %                  $             $              %          %  
  Year ended 12/31/96......   0.09       0.60         5.97      199.74                     5,015        0.545     0.79       5.78   
  Year ended 12/31/95 .....  19.18       0.60         6.22      114.42                     4,497        0.571     0.99       5.83   
  Year ended 12/31/94......  (3.39)      0.60         5.12      237.23                     3,606        0.430     1.31       4.41   
  Year ended 12/31/93......   7.98       0.74         5.41       33.21                     3,775        0.675     1.07       5.08   
  Year ended 12/31/92......   5.60       1.00         6.22       23.40                     4,750                                    
  Year ended 12/31/91......  14.58       0.60         7.30        6.34                     5,369        0.712     1.42       6.48   
  Year ended 12/31/90......   6.14       1.73         6.59        6.62                     4,600                                    
  Year ended 12/31/89......   8.70       2.13         6.51       49.92                     4,129        0.643     2.27       6.37   
  6/21/88*-12/31/88........   1.01       2.99+        5.25+     144.21                     2,223                                    

CAPITAL PORTFOLIO                                                                                                                   
  Year ended 12/31/97......                                                                                                         
  Year ended 12/31/96......  14.51       0.59         0.29       88.78        $0.0557     14,313                                    
  Year ended 12/31/95 .....  27.17       0.60         0.32      122.20                     9,294        0.035     0.71       0.21   
  Year ended 12/31/94......  (4.59)      0.60         0.10       67.39                     5,942       (0.036)    0.96      (0.26)  
  Year ended 12/31/93......  11.65       0.71         0.09       65.30                     5,886       (0.003)    0.83      (0.03)  
  Year ended 12/31/92......   6.80       0.91        (0.14)      54.95                     5,497                                    
  Year ended 12/31/91......  59.05       0.60         0.56       31.44                     5,812       (0.035)    1.37      (0.21)  
  Year ended 12/31/90......  (3.18)      2.15         0.18       28.94                     3,560                                    
  Year ended 12/31/89......  16.47       3.55        (0.88)      32.55                     2,577       (0.092)    3.80      (1.12)  
  6/21/88*-12/31/88........   0.60       6.99+       (0.11)+        --                       890                                    

CASH MANAGEMENT PORTFOLIO                                                                                                           
  Year ended 12/31/97......                                                                                                         
  Year ended 12/31/96......   5.43         --         5.30          --                     9,755        0.047     0.63       4.67   
  Year ended 12/31/95 .....   5.60         --         5.48          --                     7,800        0.046     0.87       4.61   
  Year ended 12/31/94......   4.03         --         3.98          --                     3,230        0.025     1.48       2.50   
  Year ended 12/31/93......   3.00         --         2.96          --                     3,102        0.019     1.07       1.89   
  Year ended 12/31/92......   3.53         --         3.50          --                     4,230        0.025     0.97       2.53   
  Year ended 12/31/91......   5.70         --         5.49          --                     5,849        0.048     0.83       4.66   
  Year ended 12/31/90......   7.79         --         7.53          --                     3,994        0.045     2.97       4.56   
  Year ended 12/31/89......   7.81         --         7.72          --                       908       (0.019)    9.57      (1.85)  
  6/21/88*-12/31/88........   2.35       0.95+        5.83+         --                       283       (0.050)   20.02+    (13.24)+ 

COMMON STOCK PORTFOLIO                                                                                                              
  Year ended 12/31/97......                                                                                                         
  Year ended 12/31/96......  20.08       0.53         1.99       50.33         0.0561     37,168                                    
  Year ended 12/31/95 .....  27.28       0.54         2.42       55.48                    28,836                                    
  Year ended 12/31/94......   0.04       0.60         2.45       15.29                    20,168        0.361     0.62       2.43   
  Year ended 12/31/93......  11.94       0.55         2.10       10.70                    21,861                                    
  Year ended 12/31/92......  12.14       0.56         2.21       12.57                    24,987                                    
  Year ended 12/31/91......  33.16       0.60         2.63       27.67                    26,103        0.350     0.71       2.52   
  Year ended 12/31/90......  (3.15)      0.88         3.01       13.78                    18,030                                    
  Year ended 12/31/89......  24.11       1.59         2.32       37.56                     9,332        0.236     1.67       2.23   
  6/21/88*-12/31/88........   1.80       3.62+        1.65+      14.40                     2,476                                    

    
</TABLE>


                                      P-5

<PAGE>
                        FINANCIAL HIGHLIGHTS (continued)
<TABLE>
<CAPTION>
   

                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                   NET REALIZED                                            
                                                                  & UNREALIZED    INCREASE                               
                            NET ASSET               NET REALIZED   GAIN (LOSS)   (DECREASE)                            NET INCREASE
                            VALUE AT        NET     & UNREALIZED  FROM FOREIGN      FROM                 DISTRIBUTIONS   (DECREASE)
PER SHARE OPERATING         BEGINNING   INVESTMENT   GAIN (LOSS)    CURRENCY     INVESTMENT   DIVIDENDS     FROM NET    IN NET ASSET
  PERFORMANCE:              OF PERIOD     INCOME   ON INVESTMENTS  TRANSACTIONS  OPERATIONS     PAID     GAIN REALIZED     VALUE 
- -------------------         ---------   ---------- -------------- -------------  ----------   ---------  ------------- ------------

<S>                         <C>            <C>         <C>          <C>          <C>          <C>           <C>          <C>        
COMMUNICATIONS AND                                                                                                     
  INFORMATION PORTFOLIO                                                                                                
  Year ended 12/31/97...... $14.690          $        $                          $              $              $         $          
  Year ended 12/31/96......  13.500           --        1.190                      1.190         --             --         1.190    
  Year ended 12/31/95 .....  10.440           --        4.015                      4.015         --         (0.955)        3.060    
  10/11/94*-12/31/94.......  10.000       (0.016)       0.456                      0.440         --             --         0.440    
                                                                                                                       
FRONTIER PORTFOLIO                                                                                                     
  Year ended 12/31/97......  14.980                                                                                    
  Year ended 12/31/96......  13.560        0.001        3.220                      3.221         --         (1.801)        1.420    
  Year ended 12/31/95 .....  10.580       (0.001)       3.512                      3.511         --         (0.531)        2.980    
  10/11/94*-12/31/94.......  10.000       (0.012)       0.592                      0.580         --             --         0.580    
                                                                                                                       
GLOBAL GROWTH                                                                                                          
  Opportunities Portfolio                                                                                              
  Year ended 12/31/97......   9.910                                                                                    
  5/1/96*-12/31/96.........  10.000        0.008        0.018       $(0.104)      (0.078)    (0.012)            --        (0.090)   
                                                                                                                       
GLOBAL SMALLER COMPANIES                                                                                               
  PORTFOLIO                                                                                                            
  Year ended 12/31/97......  12.870                                                                                    
  Year ended 12/31/96......  11.670        0.022        2.305        (0.158)       2.169     (0.018)        (0.951)        1.200    
  Year ended 12/31/95......  10.310        0.051        2.037        (0.301)       1.787     (0.052)        (0.375)        1.360    
  10/11/94*-12/31/94.......  10.000        0.058        0.266         0.029        0.353     (0.043)            --         0.310    
                                                                                                                       
GLOBAL TECHNOLOGY                                                                                                      
  PORTFOLIO                                                                                                            
  Year ended 12/31/97......  10.320                                                                                    
  5/1/96*-12/31/96.........  10.000       (0.004)       0.305         0.099        0.400         --         (0.080)        0.320    
                                                                                                                       
INTERNATIONAL PORTFOLIO                                                                                                
  Year ended 12/31/97......  12.960                                                                                    
  Year ended 12/31/96......  12.390        0.074        1.124        (0.323)       0.875     (0.068)        (0.237)        0.570    
  Year ended 12/31/95......  11.340        0.154        0.896         0.236        1.286     (0.151)        (0.085)        1.050    
  Year ended 12/31/94......  11.370        0.131       (0.306)        0.325        0.150     (0.064)        (0.116)       (0.030)   
  5/3/93*-12/31/93.........  10.000        0.021        1.518        (0.099)       1.440     (0.053)        (0.017)        1.370    
                                                                                                                       
HIGH-YIELD BOND PORTFOLIO                                                                                              
  Year ended 12/31/97......  11.190                                                                                    
  Year ended 12/31/96......  10.500        0.768        0.766            --        1.534     (0.766)        (0.078)        0.690    
  5/1/95*-12/31/95.........  10.000        0.218        0.519            --        0.737     (0.219)        (0.018)        0.500    
                                                                                                                       
INCOME PORTFOLIO                                                                                                       
  Year ended 12/31/97......  10.520                                                                                    
  Year ended 12/31/96......  10.560        0.579        0.126            --        0.705     (0.579)        (0.166)       (0.040)   
  Year ended 12/31/95......   9.970        0.604        1.187            --        1.791     (0.604)        (0.597)        0.590    
  Year ended 12/31/94......  11.380        0.689       (1.369)           --       (0.680)    (0.730)            --        (1.410)   
  Year ended 12/31/93......  11.390        0.828        0.576            --        1.404     (0.828)        (0.586)       (0.010)   
  Year ended 12/31/92......  11.250        0.862        0.896            --        1.758     (0.987)        (0.631)        0.140    
  Year ended 12/31/91......   9.500        0.896        2.024            --        2.920     (0.904)        (0.266)        1.750    
  Year ended 12/31/90......  10.780        0.829       (1.487)           --       (0.658)    (0.622)            --        (1.280)   
  Year ended 12/31/89......  10.040        0.634        0.834            --        1.468     (0.419)        (0.309)        0.740    
  6/21/88*-12/31/88........  10.000        0.142       (0.032)           --        0.110     (0.070)            --         0.040    
                                                                                                                       
</TABLE>
- --------------
  * Commencement of operations.
 ** The Manager, at its discretion, waived its management fee and/or reimbursed 
    expenses for certain periods presented.
  + Annualized.
    

                                      P-6


<PAGE>
<TABLE>
<CAPTION>
   
                                                                                                          
                                                                                                           
                                                                                                      
                                                                                                   
                                                               RATIOS/SUPPLEMENTAL DATA                        
                                                  -----------------------------------------------------------  
                                        TOTAL                   NET                                 NET ASSETS  
                            NET ASSET   RETURN    EXPENSES   INVESTMENT                                AT      
                            VALUE AT   BASED ON      TO        INCOME                                END OF    
                             END         NET       AVERAGE     (LOSS)                    AVERAGE     PERIOD    
PER SHARE OPERATING           OF        ASSET        NET      TO AVERAGE   PORTFOLIO    COMMISSION    (000s     
  PERFORMANCE:              PERIOD      VALUE      ASSETS     NET ASSETS   TURNOVER     RATE PAID    OMITTED)  
- -------------------         --------   --------   ----------  ----------   ----------   ----------  ---------- 
<S>                          <C>       <C>           <C>        <C>          <C>         <C>           <C>     
COMMUNICATIONS AND         
  INFORMATION PORTFOLIO    
  Year ended 12/31/97......  $                %          %            %            %     $            $        
  Year ended 12/31/96......   14.690      8.81       0.87       (0.32)       167.20       0.0530       60,645  
  Year ended 12/31/95 .....   13.500     38.55       0.95       (0.89)        96.62                    38,442  
  10/11/94*-12/31/94.......   10.440      4.40       0.95+      (0.95)+          --                       495  
                                                                                                               
FRONTIER PORTFOLIO                                                                                             
  Year ended 12/31/97......                                                                                    
  Year ended 12/31/96......   14.980     23.93       0.92       (0.37)       119.74       0.0532       31,672  
  Year ended 12/31/95 .....   13.560     33.28       0.95       (0.55)       106.48                    12,476  
  10/11/94*-12/31/94.......   10.580      5.80       0.95+      (0.70)+          --                       169  
                                                                                                               
GLOBAL GROWTH                                                                                                  
  Opportunities Portfolio                                                                                      
  Year ended 12/31/97......                                                                                    
  5/1/96*-12/31/96.........    9.910     (0.78)      1.40+       0.37         12.99       0.0522        1,590  
                                                                                                               
GLOBAL SMALLER COMPANIES                                                                                       
  PORTFOLIO                                                                                                    
  Year ended 12/31/97......                                                                                    
  Year ended 12/31/96......   12.870     18.66       1.40        0.23         62.31       0.0219       16,876  
  Year ended 12/31/95......   11.670     17.38       1.39        0.64         55.65                     4,837  
  10/11/94*-12/31/94.......   10.310      3.53       1.20+       3.14+           --                       132  
                                                                                                               
GLOBAL TECHNOLOGY                                                                                              
  PORTFOLIO                                                                                                    
  Year ended 12/31/97......                                                                                    
  5/1/96*-12/31/96.........   10.320      4.01       1.40+       0.60+        45.04       0.0160        1,364  
                                                                                                               
INTERNATIONAL PORTFOLIO                                                                                        
  Year ended 12/31/97......                                                                                    
  Year ended 12/31/96......   12.960      7.08       1.40        0.70         48.53       0.0191        7,242  
  Year ended 12/31/95......   12.390     11.34       1.35        1.01         41.40                     4,183  
  Year ended 12/31/94......   11.340      1.32       1.20        1.17         47.34                     1,776  
  5/3/93*-12/31/93.........   11.370     14.40       1.20+       1.30+         2.82                       648  
                                                                                                               
HIGH-YIELD BOND PORTFOLIO                                                                                      
  Year ended 12/31/97......                                                                                    
  Year ended 12/31/96......   11.190     14.62       0.70        9.77        117.01                    11,176  
  5/1/95*-12/31/95.........   10.500      7.37       0.70+       7.46+        67.55                     3,009  
                                                                                                               
INCOME PORTFOLIO                                                                                               
  Year ended 12/31/97......                                                                                    
  Year ended 12/31/96......   10.520      6.66       0.59        5.37         19.59       0.0600       13,717  
  Year ended 12/31/95......   10.560     17.98       0.60        5.55         51.22                    12,619  
  Year ended 12/31/94......    9.970     (5.96)      0.60        6.34         29.76                    10,050  
  Year ended 12/31/93......   11.380     12.37       0.64        6.40         38.38                    11,220  
  Year ended 12/31/92......   11.390     15.72       0.68        7.53         39.46                    11.363  
  Year ended 12/31/91......   11.250     30.89       0.60        8.05         43.67                    11,509  
  Year ended 12/31/90......    9.500     (6.10)      1.40        8.19         21.64                     7,419  
  Year ended 12/31/89......   10.780     14.61       2.69        5.95         60.10                     4,085  
  6/21/88*-12/31/88........   10.040      1.10       5.02+       2.46+           --                     1,265  
                                                                                                         
                                                                                                         
</TABLE>








                                         WITHOUT MANAGEMENT FEE WAIVER
                                          AND/OR EXPENSE REIMBURSEMENT**
                                 ---------------------------------------------
                                                                 RATIOS OF
                                                  RATIOS OF    NET INVESTMENT
                                 NET INVESTMENT  EXPENSES TO    INCOME (LOSS)
PER SHARE OPERATING              INCOME (LOSS)   AVERAGE NET     TO AVERAGE
  PERFORMANCE:                    PER SHARE         ASSETS       NET ASSETS
- -------------------              --------------  -----------    --------------

COMMUNICATIONS AND         
  INFORMATION PORTFOLIO    
  Year ended 12/31/97......      $                      %                %      
  Year ended 12/31/96......                                                     
  Year ended 12/31/95 .....                                                     
  10/11/94*-12/31/94.......       (0.436)          13.96+         (13.96)+      
                                                                                
FRONTIER PORTFOLIO                                                              
  Year ended 12/31/97......                                                     
  Year ended 12/31/96......                                                     
  Year ended 12/31/95 .....       (0.019)           1.37           (0.97)       
  10/11/94*-12/31/94.......       (1.319)          40.47+         (40.22)+      
                                                                                
GLOBAL GROWTH                                                                   
  Opportunities Portfolio                                                       
  Year ended 12/31/97......                                                     
  5/1/96*-12/31/96.........       (0.255)           6.04+          (4.27)+      
                                                                                
GLOBAL SMALLER COMPANIES                                                        
  PORTFOLIO                                                                     
  Year ended 12/31/97......                                                     
  Year ended 12/31/96......       (0.044)           1.90           (0.27)       
  Year ended 12/31/95......       (0.051)           3.84           (1.81)       
  10/11/94*-12/31/94.......       (1.225)          37.25+         (32.91)+      
                                                                                
GLOBAL TECHNOLOGY                                                               
  PORTFOLIO                                                                     
  Year ended 12/31/97......                                                     
  5/1/96*-12/31/96.........       (0.202)           4.71+          (2.71)+      
                                                                                
INTERNATIONAL PORTFOLIO                                                         
  Year ended 12/31/97......                                                     
  Year ended 12/31/96......       (0.042)           2.30           (0.20)       
  Year ended 12/31/95......        0.001            3.40           (1.04)       
  Year ended 12/31/94......       (0.419)           6.12           (3.75)       
  5/3/93*-12/31/93.........       (1.004)          17.94+         (15.44)+      
                                                                                
HIGH-YIELD BOND PORTFOLIO                                                       
  Year ended 12/31/97......                                                     
  Year ended 12/31/96......        0.747            0.88            9.59        
  5/1/95*-12/31/95.........        0.117            4.38+           3.78+       
                                                                                
INCOME PORTFOLIO                                                                
  Year ended 12/31/97......                                                     
  Year ended 12/31/96......                                                     
  Year ended 12/31/95......        0.602            0.62            5.53        
  Year ended 12/31/94......        0.670            0.77            6.17        
  Year ended 12/31/93......        0.826            0.65            6.39        
  Year ended 12/31/92......                                                     
  Year ended 12/31/91......        0.867            0.93            7.72        
  Year ended 12/31/90......                                                     
  Year ended 12/31/89......        0.610            2.88            5.77        
  6/21/88*-12/31/88........        0.089            5.42+           2.07+       
                                                           

    

                                      P-7
<PAGE>



INVESTMENT OBJECTIVES AND POLICIES

     Set forth below is a description of the investment objective of each of the
Fund's  Portfolios  and  their  investment  policies.  Of  course,  because  any
investment  involves risk,  there can be no assurance that any of the Portfolios
will meet its objective.  The investment  objective of each Portfolio may not be
changed without the affirmative  vote of the holders of a majority of the voting
securities of that Portfolio;  however,  unless  otherwise noted, the investment
policies of each Portfolio are not  fundamental and may be changed by the Fund's
Board of Directors without a vote of shareholders.  A more detailed  description
of each Portfolio's investment policies,  including a list of those restrictions
on each Portfolio's investment activities which cannot be changed without such a
vote, appears in the Statement of Additional Information.  Information regarding
the various  rating  categories  used by the  Standard & Poor's  Rating  Service
("S&P") and Moody's Investors Service, Inc. ("Moody's"),  and referred to in the
following descriptions, is included in the Appendix to this Prospectus.



SELIGMAN BOND PORTFOLIO

     The investment  objective of this Portfolio is to achieve favorable current
income  by  investing  in debt  securities,  including  convertible  issues  and
preferred stock,  diversified over a number of industries.  Capital appreciation
will be a secondary consideration in selecting portfolio securities. As a matter
of fundamental  policy,  the Portfolio will invest at least 80% of its assets in
securities that are rated investment grade.

     The  Portfolio's  assets may be invested in (l) corporate debt  securities,
including  bonds and debentures  convertible  into common stock or with warrants
and rights; (2) debt securities issued or guaranteed by the U.S. Government, its
agencies or instrumentalities; or (3) mortgage-backed debt securities, including
securities issued by the Government National Mortgage  Association  ("GNMA") and
debt obligations secured by commercial or residential real estate,  rated within
one of the three highest rating categories by S&P or, if unrated,  of comparable
quality in the opinion of the Manager;  (4) preferred  stock; and (5) commercial
paper rated within one of the three highest rating categories by S&P or Moody's.
The Portfolio may also hold or sell any securities obtained through the exercise
of  conversion   rights  or  warrants,   or  as  a  result  of   reorganization,
recapitalization,  or liquidation  proceedings of any issuer of securities owned
by the  Portfolio.  Long-term debt  securities  normally will be held when it is
believed that the trend of interest rates is down and prices of such  securities
will increase;  conversely,  when it is believed that  long-term  interest rates
will rise, the Portfolio may attempt to shift into  short-term  debt  securities
that are  generally  not as volatile  as  longer-term  securities  in periods of
rising interest rates. The Portfolio may,  pending  investment and for temporary
defensive  purposes,  invest without  limitation in high-grade  short-term money
market instruments,  including repurchase agreements,  of the types listed under
"Seligman Cash Management Portfolio."

     Corporate debt securities purchased by the Portfolio will, in order to meet
the Portfolio's  fundamental  policy,  be investment  grade bonds that are rated
within one of the four  highest  rating  categories  by S&P or  Moody's.  To the
extent that the Portfolio may invest in lower-rated bonds, an investor should be
aware that while providing higher yields,  such lower-rated  bonds generally are
subject to greater market fluctuations and risks of loss of income and principal
than  higher-rated  (and  lower-yielding)  bonds.  A  description  of the credit
ratings and the risks  associated  with such  investments  is  contained  in the
Appendix to this Prospectus. U.S. Government and agency obligations in which the
Portfolio invests may include direct obligations of the U.S.  Treasury,  such as
bills, notes and bonds, and marketable  obligations issued by a U.S.  Government
agency or  instrumentality.  Agency securities include those issued by the Small
Business  Administration,  General  Services  Administration  and  Farmers  Home
Administration, which are guaranteed by the U.S. Treasury. Other such securities
are  supported by the right of the issuer to borrow from the  Treasury,  such as
securities issued by the Federal Home Loan Mortgage Corporation ("FHLMC"), while
certain  other  securities  are  supported  only by the  credit of the agency or
instrumentality  itself,  such as  securities  issued  by the  Federal  National
Mortgage  Association  ("FNMA").  Commercial paper includes unsecured promissory
notes of corporate issuers, which securities generally have remaining maturities
not exceeding nine months.

     The mortgage-backed  securities in which the Portfolio invests will include
securities  that represent  interests in pools of mortgage loans made by lenders
such as savings and loan institutions,  mortgage bankers,  and commercial banks.
Such securities  provide a  "pass-through"  of monthly  payments of interest and
principal made by the borrowers on their residential  mortgage loans (net of any
fees  paid  to the  issuer  or  guarantor  of  such  securities).  Although  the
residential mortgages underlying a pool may have maturities of up to 30 years, a
pool's  effective  maturity  may be reduced by  prepayments  of principal on the
underlying mortgage obligations. Factors affecting

                                      P-8
<PAGE>

mortgage prepayments  include,  among other things, the level of interest rates,
general  economic  and  social  conditions  and  the  location  and  age  of the
mortgages.  High  interest  rate  mortgages  are more likely to be prepaid  than
lower-rate mortgages; consequently, the effective maturities of mortgage-related
obligations that pass-through payments of higher-rate mortgages are likely to be
shorter  than those of  obligations  that  pass-through  payments of  lower-rate
mortgages.  If such  prepayment  of  mortgage-related  securities  in which  the
Portfolio  invests  occurs,  the  Portfolio  may have to invest the  proceeds in
securities with lower yields.

     GNMA is a U.S. Government  corporation within the Department of Housing and
Urban  Development,  authorized to guarantee,  with the full faith and credit of
the U.S. Government,  the timely payment of principal and interest on securities
issued by institutions  approved by GNMA (such as savings and loan institutions,
commercial  banks and mortgage  bankers) and backed by pools of Federal  Housing
Administration  insured  or  Veterans   Administration   guaranteed  residential
mortgages.  These  securities  entitle  the holder to receive all  interest  and
principal  payments  owed on the  mortgages  in the pool,  net of certain  fees,
regardless of whether or not the  mortgagors  actually make the payments.  Other
government-related  issuers  of  mortgage-related  securities  include  FNMA,  a
government-sponsored  corporation subject to general regulation by the Secretary
of Housing and Urban Development but owned entirely by private stockholders, and
FHLMC,  a  corporate  instrumentality  of the U.S.  Government  created  for the
purpose of  increasing  the  availability  of  mortgage  credit for  residential
housing  that is owned by the  twelve  Federal  Home Loan  Banks.  FHLMC  issues
Participation  Certificates ("PCs"), which represent interests in mortgages from
FHLMC's national portfolio.  FHLMC guarantees the timely payment of interest and
ultimate  collection of principal,  but PCs are not backed by the full faith and
credit of the U.S. Government. Pass-through securities issued by FNMA are backed
by residential mortgages purchased from a list of approved  seller/servicers and
are  guaranteed as to timely  payment of principal and interest by FNMA, but are
not backed by the full faith and credit of the U.S. Government.

     Commercial banks, savings and loan institutions, private mortgage insurance
companies,  mortgage  bankers and other  secondary  market  issuers  also create
pass-through  securities  based on pools of  conventional  residential  mortgage
loans.  Securities created by such  non-governmental  issuers may offer a higher
rate of interest than government-related securities;  however, timely payment of
interest  and  principal  may or may not be  supported by insurance or guarantee
arrangements,  and there can be no assurance  that the private  issuers can meet
their obligations.



SELIGMAN CAPITAL PORTFOLIO

     The  investment   objective  of  this  Portfolio  is  to  produce   capital
appreciation  for its  shareholders.  Current  income is not an  objective.  The
Portfolio  will seek to achieve its  objective by investing in common stocks and
securities  convertible into or exchangeable for common stocks,  in common stock
purchase  warrants  and  rights,  in debt  securities  and in  preferred  stocks
believed to provide capital appreciation  opportunities.  Common stocks, for the
most part, are selected for their near or intermediate-term  prospects. They may
be stocks  believed to be  underpriced or stocks of growth  companies,  cyclical
companies, or companies believed to be undergoing a basic change for the better.
They  may  be  stocks  of  established,   well-known   companies  or  of  newer,
less-seasoned  companies  believed to have  better-than-average  prospects.  The
principal criterion for choice of investments is capital appreciation potential.

     The Portfolio may, pending investment and for temporary defensive purposes,
hold cash and invest without  limitation in high-grade,  short-term money market
instruments,   including  repurchase  agreements,  of  the  types  listed  under
"Seligman Cash Management Portfolio."

     The Seligman  Capital  Portfolio may borrow money to increase its portfolio
of  securities.  Investing for capital  appreciation  and  borrowing  ordinarily
expose  capital  to added  risk,  and  investment  in the  Portfolio  should  be
considered only by persons who are able and willing to take such risk.



SELIGMAN CASH MANAGEMENT PORTFOLIO

     The investment  objective of this  Portfolio is to preserve  capital and to
maximize liquidity and current income by investing in a diversified portfolio of
high-quality money market instruments consisting of U.S. Government obligations,
U.S.  dollar-denominated bank obligations (including those issued by U.S. banks,
their foreign  branches and

                                      P-9
<PAGE>

U.S. branches of foreign banks), prime commercial paper, high-grade,  short-term
corporate  obligations and repurchase agreements with respect to the above types
of  instruments.  The Portfolio  seeks to maintain a constant net asset value of
$1.00 per share; there can be no assurance that the Portfolio will be able to do
so. In an effort to maintain a stable net asset value,  the  Portfolio  uses the
amortized cost method of valuing its securities.

     The Portfolio will invest only in U.S. dollar-denominated securities having
a  remaining  maturity  of 13  months  (397  days) or less and will  maintain  a
dollar-weighted  average  portfolio  maturity of 90 days or less.  The Portfolio
will  limit  its  investments  to those  securities  that,  in  accordance  with
guidelines  adopted by the Board of  Directors,  present  minimal  credit risks.
Accordingly,  the  Portfolio  will not purchase any security  (other than a U.S.
Government  obligation)  unless (i) it is rated in one of the two highest rating
categories  assigned to short-term  debt  securities by at least two  nationally
recognized statistical rating organizations  ("NRSROs") such as Moody's and S&P,
or  (ii)  if  not  so  rated,  it is  determined  to be of  comparable  quality.
Determinations of comparable  quality will be made in accordance with procedures
established by the Directors.  These  standards must be satisfied at the time an
investment  is made.  If the  quality  of the  investment  later  declines,  the
Portfolio may continue to hold the investment,  subject in certain circumstances
to a finding by the Board of Directors that  disposing of the  investment  would
not be in the Portfolio's best interest.

     Presently, the Portfolio only invests in either U.S. Government obligations
or  securities  that are rated in the top rating  category  by Moody's  and S&P.
However,  the  Portfolio  is  permitted  to  invest  up to 5% of its  assets  in
securities  rated in the second highest rating category by two NRSROs,  provided
that not more than the  greater  of 1% of its  total  assets  or  $1,000,000  is
invested in any one such security.

     U.S.  GOVERNMENT   OBLIGATIONS  in  which  the  Portfolio  invests  include
obligations  issued or guaranteed as to both  principal and interest by the U.S.
Government or backed by the full faith and credit of the United States,  such as
U.S. Treasury bills, securities issued or guaranteed by a U.S. Government agency
or  instrumentality,  and  securities  supported  by the right of the  issuer to
borrow from the U.S. Treasury.

     BANK OBLIGATIONS purchased by the Portfolio include U.S. dollar-denominated
certificates  of  deposit,   banker's  acceptances,   fixed  time  deposits  and
commercial paper of domestic banks, including their branches located outside the
United States,  and of domestic  branches of foreign banks.  Investments in bank
obligations  will be limited at the time of investment to the obligations of the
100 largest  domestic  banks in terms of assets which are subject to  regulatory
supervision by the U.S. Government or state governments,  and the obligations of
the 100 largest  foreign  banks in terms of assets with  branches or agencies in
the United States.

     COMMERCIAL   PAPER  AND  SHORT-TERM   CORPORATE  DEBT  SECURITIES   include
short-term  unsecured promissory notes with maturities not exceeding nine months
issued  in bearer  form by bank  holding  companies,  corporations  and  finance
companies. Investments in commercial paper issued by bank holding companies will
be  limited at the time of  investment  to the 100  largest  U.S.  bank  holding
companies in terms of assets.

     YIELD INFORMATION. Investors should recognize that, in periods of declining
interest rates,  yields will tend to be somewhat  higher than prevailing  market
rates,  and in periods of rising interest rates, the yield of the Portfolio will
tend to be somewhat lower. Also, when interest rates are falling,  the inflow of
new money to the Portfolio from the continuous sale of its shares will likely be
invested in portfolio instruments producing lower yields than the balance of the
Portfolio  assets,  thereby  reducing  the current  yield of the  Portfolio.  In
periods of rising  interest  rates,  the opposite can be true. The Portfolio may
attempt  to  increase  yields on its  investments  by using  trading  techniques
designed  to take  advantage  of  short-term  market  variations.  This  policy,
together  with the short  maturities  of the  securities  in which the Portfolio
invests,  would  result  in high  portfolio  turnover.  The  Portfolio  does not
anticipate  incurring   significant  brokerage  or  transaction  expenses  since
portfolio  transactions  ordinarily will be made directly with the issuer, money
market dealer, or other financial institution on a net price basis.



SELIGMAN COMMON STOCK PORTFOLIO

     The investment objective of this Portfolio is to produce favorable, but not
the  highest,  current  income and  long-term  growth of both income and capital
value,  without  exposing  capital to undue risk. The Portfolio seeks to achieve
its objective primarily through equity investments,  and in general, investments
will be broadly  diversified  over a number of  industries.  The Portfolio  may,
pending  investment  and  for  temporary  defensive  purposes,   invest  without

                                      P-10
<PAGE>

limitation  in  high-grade,  short-term  money  market  instruments,   including
repurchase  agreements,  of the types listed  under  "Seligman  Cash  Management
Portfolio."



SELIGMAN COMMUNICATIONS AND INFORMATION PORTFOLIO

     The  investment  objective of this  Portfolio is to produce  capital  gain.
Income is not an  objective.  The  Portfolio  seeks to achieve its  objective by
investing in a portfolio  consisting  of  securities  of companies  operating in
virtually all aspects of the communications, information and related industries.
It invests at least 80% of its net assets,  exclusive of government  securities,
short-term notes, cash and cash equivalents,  in securities of companies engaged
in these industries.

     The value of Portfolio  shares may be susceptible to factors  affecting the
communications,  information and related industries.  As such, this Portfolio is
not an appropriate investment for individuals who require safety of principal or
stable income from their investments. These industries may be subject to greater
governmental  regulation than many other  industries and changes in governmental
policies and the need for regulatory approvals may have a material effect on the
products  and  services  of  these  industries.  Although  securities  of  large
companies  that  now  are  well  established  in the  world  communications  and
information  market and can be expected to grow with the market are held by this
Portfolio,   rapidly   changing   technologies   and   the   expansion   of  the
communications,   information  and  related   industries   provide  a  favorable
environment  for  investing in companies of small to medium size.  Securities of
smaller,  less-seasoned  companies may be subject to greater price  fluctuation,
limited liquidity and above-average investment risk.

     This Portfolio  invests  primarily in common stocks.  It also may invest in
securities  convertible into or exchangeable for common stocks,  in warrants and
rights to purchase  common  stocks and in debt  securities  or preferred  stocks
believed to provide  opportunities  for  capital  gain.  It is this  Portfolio's
present  intention  to  invest  not  more  than  5% of its  net  assets  in debt
securities  that are not rated within the four highest rating  categories by S&P
or by Moody's.



SELIGMAN FRONTIER PORTFOLIO

     The investment  objective of this Portfolio is to produce growth in capital
value;  income may be considered but will be only  incidental to the Portfolio's
investment objective. This Portfolio seeks to achieve its objective by investing
in a portfolio  consisting of securities of companies  selected for their growth
prospects.  It  invests  primarily  in  common  stocks,  and may also  invest in
securities  that may be exchanged for or converted into common stock,  preferred
stock and common stock purchase  warrants and rights  believed by the Manager to
provide capital growth opportunities.

   
     Under  normal  conditions,  the  Portfolio  will invest at least 65% of the
value of its total assets in equity securities with market  capitalizations,  at
the time of  purchase  by the  Portfolio,  of up to  $1.25  billion.  Stocks  of
companies  believed by the Manager to have  special  characteristics  (such as a
high  growth  rate of unit  sales,  an  important  opportunity  in a  developing
industry or a distinct competitive  advantage) are favored.  Securities of these
companies may be subject to above-average  market price fluctuation and business
risk; however,  the Manager will seek to temper such risks by diversification of
investments and by avoiding concentration of investments in any one industry.
    

     This  Portfolio's  investments,  other than in  securities of the companies
discussed above, will be substantially in securities issued or guaranteed by the
U.S.  Government  (such as  Treasury  bills,  notes and  bonds),  its  agencies,
instrumentalities or authorities,  highly-rated corporate debt securities (rated
AA-, or better,  by S&P or Aa3, or better,  by Moody's);  prime commercial paper
(rated A-1+/A-1 by S&P or P-1 by Moody's) and certificates of deposit of the 100
largest  (based on assets) banks that are subject to regulatory  supervision  by
the U.S.  Government or state  governments and the 100 largest (based on assets)
foreign banks with branches or agencies in the United States.



                                      P-11
<PAGE>

SELIGMAN HENDERSON GLOBAL GROWTH OPPORTUNITIES PORTFOLIO
SELIGMAN HENDERSON GLOBAL SMALLER COMPANIES PORTFOLIO
SELIGMAN HENDERSON GLOBAL TECHNOLOGY PORTFOLIO
SELIGMAN HENDERSON INTERNATIONAL PORTFOLIO

   
     Unless  otherwise  indicated,   the  following  description  of  investment
objectives and policies applies to each of the Seligman  Henderson Global Growth
Opportunities  Portfolio  ("Global Growth  Opportunities  Portfolio"),  Seligman
Henderson  Global  Smaller  Companies   Portfolio   ("Global  Smaller  Companies
Portfolio"),  Seligman Henderson Global Technology Portfolio ("Global Technology
Portfolio")  and  Seligman  Henderson  International  Portfolio  ("International
Portfolio").
    

     The investment  objective of the Global Growth  Opportunities  Portfolio is
long-term capital appreciation.  The Global Growth Opportunities Portfolio seeks
to  achieve  its  objective  by  investing  primarily  in equity  securities  of
companies  that have the  potential  to benefit  from global  economic or social
trends.  The Subadviser  believes that such trends are reshaping the world as it
moves towards the new millennium.  The trends that will be initially  focused on
will include  global  economic  liberalization  and the flow of capital  through
trade and investment; the globalization of the world's economy; the expansion of
technology  as an  increasingly  important  influence on society;  the increased
awareness of the importance of protecting the  environment;  and the increase in
life expectancy  leading to changes in consumer  demographics and a greater need
for healthcare, security and leisure.

     The  investment  objective  of the Global  Smaller  Companies  Portfolio is
long-term  capital   appreciation   primarily  through  global   investments  in
securities  of  companies  with small to medium  market  capitalizations.  Under
normal market conditions, the Global Smaller Companies Portfolio will invest its
assets in securities of issuers located in at least three  different  countries,
one of which may be the  U.S.,  and will  invest  at least 65% of its  assets in
securities of small to medium-sized  companies with market  capitalization up to
$1 billion.

     The investment  objective of the Global  Technology  Portfolio is long-term
capital  appreciation.  The Global  Technology  Portfolio  seeks to achieve  its
objective  by  making  global  investments  of at  least  65% of its  assets  in
securities   of  companies   with  business   operations   in   technology   and
technology-related   industries.   The  Global   Technology   Portfolio  defines
technology  as the use of science to create new products and  services.  As such
the industry  comprises not only information  technology and  communications but
also medical, environmental and bio-technology.  The Global Technology Portfolio
expects to invest in a broad range of  technologies.  The  technology  market is
global in its scope and has exhibited and continues to demonstrate  rapid growth
both  through  increasing  demand for  existing  products  and  services and the
broadening of the technology market. Penetration rates remain low while emerging
technologies such as multimedia and genetic engineering are opening up whole new
markets. The application of new technology to traditional industries is, in many
cases,   revolutionizing   both   manufacturing  and  distribution   industries.
Nonetheless,  older  technologies  such as  photography  and  print  may also be
represented.  The Subadviser expects to take advantage of valuation anomalies in
international  markets created by the emergence of established  U.S.  technology
trends in overseas markets and the relative immaturity of the technology sectors
in those countries'  securities markets.  Securities of large companies that are
well established in the world technology market can be expected to grow with the
market and will frequently be held by the Global Technology Portfolio;  however,
rapidly   changing   technologies   and  the   expansion   of   technology   and
technology-related  industries provide a favorable environment for investment in
companies  of  small-  to  medium-size.   Consequently,  the  Global  Technology
Portfolio's   investments   are  not  subject  to  any  minimum   capitalization
requirement,  and the  Global  Technology  Portfolio  may  invest in  securities
without regard to the capitalization of the issuer.

     The  investment  objective  of the  International  Portfolio  is  long-term
capital appreciation  primarily through international  investments in securities
of medium-  to  large-sized  companies.  Under  normal  market  conditions,  the
International  Portfolio  will invest 65% of its assets in securities of issuers
located in at least three different countries, not including the U.S.

   
     Seligman  Henderson Co. (the  "Subadviser")  will  supervise and direct the
investments of each of the Seligman  Henderson  Portfolios.  While each Seligman
Henderson Portfolio may invest in securities of issuers domiciled in any country
(except  the  International  Portfolio,  which  normally  will not invest in the
U.S.),  under  normal  conditions  investments  will be  made in four  principal
regions: The United Kingdom/Continental Europe, North America, the Pacific Basin
and Latin America.  Continental  European  countries  include Austria,  Belgium,
Denmark,  Finland,  France, Germany,  Greece, Ireland,  Italy,  Luxembourg,  the
Netherlands,  Norway, Portugal,  Spain, Sweden,  Switzerland and
    

                                      P-12
<PAGE>

   
Turkey. Pacific Basin countries include Australia,  Hong Kong, India, Indonesia,
Japan, Korea, Malaysia,  New Zealand,  Pakistan, The People's Republic of China,
The  Philippines,  Singapore,  Sri Lanka,  Taiwan and  Thailand.  North  America
includes  the  United  States  and  Canada.  Latin  American  countries  include
Argentina, Brazil, Chile, Mexico and Venezuela.
    

     In  allocating   investments   among  geographic   regions  and  individual
countries,  the Subadviser  will consider such factors as the relative  economic
growth  potential of the various  economies  and  securities  markets;  expected
levels of  inflation;  financial,  social and political  conditions  influencing
investment opportunities; and the outlook for currency relationships.

   
     The Seligman  Henderson  Portfolios  may invest in all types of securities,
most of which will be  denominated  in  currencies  other than the U.S.  dollar.
Since  opportunities  for long-term  growth are  primarily  expected from equity
securities,  the  Portfolios  will normally  invest  substantially  all of their
assets in such securities,  including common stock,  securities convertible into
common stock,  depositary  receipts for these  securities  and  warrants.  These
Portfolios may, however, invest up to 25% of their assets in preferred stock and
debt  securities  if the  Subadviser  believes  that  the  capital  appreciation
available from an investment in such securities will equal or exceed the capital
appreciation  available  from an investment in equity  securities.  Dividends or
interest  income are  considered  only when the  Subadviser  believes  that such
income  will have a  favorable  influence  on the market  value of a security in
light of each Portfolio's objective of capital  appreciation.  Equity securities
in which each of the Seligman Henderson  Portfolios will invest may be listed on
a U.S. or foreign stock  exchange or traded in U.S. or foreign  over-the-counter
markets.

     There is no  requirement  that the debt  securities  in which the  Seligman
Henderson Portfolios invest be rated by a recognized rating agency.  However, it
is each Portfolio's policy that investments in debt securities, whether rated or
unrated,  will be made only if they are,  in the opinion of the  Subadviser,  of
equivalent  quality  to  "investment   grade"  securities.   "Investment  grade"
securities are those rated within the four highest  quality grades as determined
by Moody's or S&P. Debt securities are  interest-rate  sensitive,  so that their
value will tend to decrease when interest  rates rise and increase when interest
rates fall.

     DEPOSITARY  RECEIPTS.  The  Seligman  Henderson  Portfolios  may  invest in
securities  represented  by  American  Depositary  Receipts  ("ADRs"),  American
Depositary  Shares  ("ADSs"),  European  Depositary  Receipts  ("EDRs"),  Global
Depositary Receipts ("GDRs") or Global Depositary Shares ("GDSs"). ADRs and ADSs
are  instruments  generally  issued by domestic  banks or trust  companies  that
represent  the deposit of a security of a foreign  issuer.  ADRs and ADSs may be
publicly  traded on exchanges or  over-the-counter  in the United States and are
quoted and  settled in dollars  at a price that  generally  reflects  the dollar
equivalent  of the home country share price.  EDRs,  GDRs and GDSs are typically
issued by foreign  banks or trust  companies and traded in Europe.  ADRs,  ADSs,
EDRs,  GDRs and GDSs may be issued under sponsored or unsponsored  programs.  In
sponsored  programs,  the issuer has made  arrangements  to have its  securities
trade in the form of ADRs,  ADSs,  EDRs, GDRs or GDSs. In unsponsored  programs,
the issuer may not be directly involved in the creation of the program. Although
regulatory  requirements with respect to sponsored and unsponsored  programs are
generally  similar,  the issuers of unsponsored  ADRs, ADSs, EDRs, GDRs and GDSs
are not obligated to disclose  material  information in the U.S., and therefore,
the import of such  information may not be reflected in the market value of such
receipts.

     By investing in foreign securities,  the Seligman Henderson Portfolios will
attempt  to  take  advantage  of  differences  among  economic  trends  and  the
performance  of securities  markets in various  countries.  To date,  the market
values of  securities  of issuers  located  in  different  countries  have moved
relatively  independently of each other.  During certain periods,  the return on
equity  investments  in some  countries  has  exceeded  the  return  on  similar
investments  in the U.S.  The  Subadviser  believes  that,  in  comparison  with
investment companies investing solely in domestic securities, it may be possible
to obtain significant  appreciation from a portfolio of foreign  investments and
securities from various markets that offer  different  investment  opportunities
and are affected by different economic trends.  Global  diversification  reduces
the effect  that events in any one  country  will have on the entire  investment
portfolio. Of course, a decline in the value of a Portfolio's investments in one
country may offset potential gains from investments in another country.

     FOREIGN  INVESTMENT  RISK  FACTORS.  Investments  in  securities of foreign
issuers may involve risks that are not associated with domestic investments, and
there can be no assurance that any of the Seligman Henderson Portfolios' foreign
investments  will  present  less risk than a portfolio  of domestic  securities.
Foreign issuers may lack
    

                                      P-13
<PAGE>

   
uniform accounting,  auditing and financial reporting  standards,  practices and
requirements,  and there is generally less publicly available  information about
foreign issuers than there is about U.S.  issuers.  Governmental  regulation and
supervision of foreign stock exchanges, brokers and listed companies may be less
pervasive than is customary in the U.S.  Securities of some foreign  issuers are
less liquid and their prices are more  volatile  than  securities  of comparable
domestic  issuers.  Foreign  securities  settlements  may in some  instances  be
subject to delays and related administrative uncertainties which could result in
temporary  periods when assets of a Portfolio  are  uninvested  and no return is
earned thereon and may involve a risk of loss to a Portfolio. Foreign securities
markets  may have  substantially  less  volume  than U.S.  markets and far fewer
traded issues.  Fixed brokerage  commissions on foreign securities exchanges are
generally higher than in the U.S., and transaction costs with respect to smaller
capitalization  companies  may be higher  than  those of  larger  capitalization
companies. Income from foreign securities may be reduced by a withholding tax at
the source or other  foreign  taxes.  In some  countries,  there may also be the
possibility of  nationalization,  expropriation  or confiscatory  taxation,  (in
which a  Portfolio  could  lose its  entire  investment  in a  certain  market),
limitations on the removal of monies or other assets of the  Portfolios,  higher
rates of inflation, political or social instability or revolution, or diplomatic
developments that could affect investments in those countries.  In addition,  it
may be difficult to obtain and enforce a judgement in a court outside the U.S.
    

     Some of the risks  described in the preceding  paragraph may be more severe
for  investments  in emerging or developing  countries.  By comparison  with the
United States and other developed  countries,  emerging or developing  countries
may have relatively unstable governments,  economies based on a less diversified
industrial  base  and  securities   markets  that  trade  a  smaller  number  of
securities.  Companies  in emerging  markets  may  generally  be  smaller,  less
experienced and more recently organized than many domestic companies.  Prices of
securities traded in the securities markets of emerging or developing  countries
tend  to be  volatile.  Furthermore,  foreign  investors  are  subject  to  many
restrictions  in  emerging  or  developing  countries.  These  restrictions  may
require,  among other things,  governmental approval prior to making investments
or repatriating income or capital, or may impose limits on the amount or type of
securities  held by foreigners or on the companies in which the  foreigners  may
invest.

     The economies of  individual  emerging  countries  may differ  favorably or
unfavorably  from the U.S.  economy in such respects as growth of gross domestic
product,  rates  of  inflation,  currency  depreciation,  capital  reinvestment,
resource  self-sufficiency and balance of payment position and may be based on a
substantially  less  diversified  industrial  base.  Further,  the  economies of
developing  countries  generally are heavily dependent upon international  trade
and, accordingly, have been, and may continue to be, adversely affected by trade
barriers, exchange controls, managed adjustments in relative currency values and
other  protectionist  measures imposed or negotiated by the countries with which
they trade.  These  economies also have been, and may continue to be,  adversely
affected by economic conditions in the countries with which they trade.

     FOREIGN  CURRENCY  RISK FACTORS.  Investments  in foreign  securities  will
usually be denominated in foreign currencies, and each Portfolio may temporarily
hold  funds  in  foreign  currencies.  The  value of a  Portfolio's  investments
denominated in foreign currencies may be affected,  favorably or unfavorably, by
the relative  strength of the U.S. dollar,  changes in foreign currency and U.S.
dollar exchange rates and exchange  control  regulations.  A Portfolio may incur
costs in connection with conversions between various  currencies.  A Portfolio's
net asset  value per share will be  affected  by changes  in  currency  exchange
rates.  Changes in foreign currency  exchange rates may also affect the value of
dividends  and  interest  earned,  gains  and  losses  realized  on the  sale of
securities  and net  investment  income and gains,  if any, to be distributed to
shareholders by the Portfolios. The rate of exchange between the U.S. dollar and
other currencies is determined by the forces of supply and demand in the foreign
exchange markets (which in turn are affected by interest rates,  trade flows and
numerous  other  factors,  including,  in  some  countries,  local  governmental
intervention).

     SMALLER COMPANY INVESTMENT RISK FACTORS.  With regard to the Global Smaller
Companies Portfolio and the Global Technology Portfolio, the Subadviser believes
that  smaller  companies  generally  have  greater  earnings  and  sales  growth
potential than larger companies.  In addition,  the Global Growth  Opportunities
Portfolio  may  also  invest  in  securities   without  regard  to  the  minimum
capitalization  of issuers.  However,  investments in such companies may involve
greater  risks,  such  as  limited  product  lines,  markets  and  financial  or
managerial  resources.  Less frequently traded securities may be subject to more
abrupt price movements than securities of larger companies.

     TECHNOLOGY  INVESTMENT  RISK  FACTORS.  The value of the Global  Technology
Portfolio  shares  may  be  susceptible  to  factors  affecting  technology  and
technology-related industries and to greater risk and market fluctuation than an
investment in a fund that invests in a broader range of portfolio securities. As
such,  the Global  Technology

                                      P-14
<PAGE>

Portfolio is not an appropriate investment for individuals who require safety of
principal   or  stable   income   from   their   investments.   Technology   and
technology-related  industries may be subject to greater governmental regulation
than many  other  industries  in  certain  countries;  changes  in  governmental
policies  and the need for  regulatory  approvals  may have a  material  adverse
effect on these  industries.  Additionally,  these  companies  may be subject to
risks of developing  technologies,  competitive  pressures and other factors and
are dependent upon consumer and business acceptance as new technologies  evolve.
Securities  of smaller,  less  experienced  companies  also may involve  greater
risks,  such as limited  product  lines,  markets and  financial  or  managerial
resources,  and trading in such  securities  may be subject to more abrupt price
movements than trading in the securities of larger companies.

   
     DERIVATIVES.  Each of the  Seligman  Henderson  Portfolios  may  invest  in
financial  instruments  commonly  known as  "derivatives"  only for  hedging  or
investment  purposes. A Portfolio will not invest in derivatives for speculative
purposes,  i.e., where the derivative  investment exposes the Portfolio to undue
risk of loss,  such as where  the risk of loss is  greater  than the cost of the
investment.
    

     A derivative is generally  defined as an instrument  whose value is derived
from, or based upon, some underlying index, reference rate (e.g., interest rates
or currency  exchange  rates),  security,  commodity or other asset. A Portfolio
will not invest in a specific type of derivative without prior approval from its
Board  of  Directors,  after  consideration  of,  among  other  things,  how the
derivative instrument serves the Portfolio's investment objective,  and the risk
associated  with the  investment.  The only  types of  derivatives  in which the
Portfolios  are  currently  permitted  to invest are stock  purchase  rights and
warrants,  and,  as  described  more  fully  below,  forward  currency  exchange
contracts and put options.

   
     A  Portfolio  may not  invest in  rights  and  warrants  if, at the time of
acquisition,  the  investment  in rights  and  warrants  would  exceed 5% of the
Portfolio's net assets (valued at the lower of cost or market). In addition,  no
more than 2% of net assets may be  invested  in  warrants  not listed on the New
York or American Stock  Exchanges.  For purposes of this  restriction,  warrants
acquired  in units  or  attached  to  securities  will be  deemed  to have  been
purchased without cost.
    

     FORWARD CURRENCY EXCHANGE  CONTRACTS.  The Subadviser will consider changes
in  exchange  rates  in  making  investment  decisions.  As one way of  managing
exchange  rate risk,  each  Portfolio may enter into forward  currency  exchange
contracts  (agreements to purchase or sell foreign currencies at a future date).
A Portfolio will usually enter into these contracts to fix the U.S. dollar value
of securities  that it has agreed to buy or sell for the period between the date
the trade was entered into and the date the security is delivered  and paid for.
A  Portfolio  may also use these  contracts  to hedge the U.S.  dollar  value of
securities it already owns. A Portfolio may be required to cover certain forward
currency exchange contract  positions by establishing a segregated  account with
its  custodian  that will contain only liquid  assets,  such as U.S.  Government
securities  or  other  liquid   high-grade   debt   obligations.   Under  normal
circumstances,  the portfolio  manager will limit forward currency  contracts to
not greater  than 75% of the  Portfolio's  position in any one country as of the
date the contract is entered into.

     Although the  Portfolios  will seek to benefit by using forward  contracts,
anticipated   currency  movements  may  not  be  accurately  predicted  and  the
Portfolios may therefore incur a gain or loss on a forward  contract.  A forward
contract may help reduce the  Portfolios'  losses on securities  denominated  in
foreign  currency,  but it may also reduce the potential  gain on the securities
depending  on changes in the  currency's  value  relative to the U.S.  dollar or
other currencies.

   
     OPTIONS  TRANSACTIONS.  Each  of  the  Seligman  Henderson  Portfolios  may
purchase  put options on portfolio  securities  in an attempt to provide a hedge
against a decrease in the price of a security held by the Portfolio. A Portfolio
will not  purchase  options for  speculative  purposes.  Purchasing a put option
gives a  Portfolio  the right to sell,  and  obligates  the  writer to buy,  the
underlying security at the exercise price at any time during the option period.
    

     When a Portfolio  purchases  an option,  it is required to pay a premium to
the party writing the option and a commission to the broker  selling the option.
If the option is exercised by the Portfolio, the premium and the commission paid
may be  greater  than the  amount of the  brokerage  commission  charged  if the
security were to be purchased or sold  directly.  See  "Investment  Policies and
Restrictions" in the Statement of Additional Information.

                                      P-15
<PAGE>

   
     TEMPORARY INVESTMENTS.  When the Subadviser believes that market conditions
warrant a temporary defensive position, a Portfolio may invest up to 100% of its
assets in short-term  instruments such as commercial paper, bank certificates of
deposit, bankers' acceptances,  or repurchase agreements for such securities and
securities of the U.S.  Government  and its agencies and  instrumentalities,  as
well as cash and cash equivalents denominated in foreign currencies. Investments
in domestic  bank  certificates  of deposit  and  bankers'  acceptances  will be
limited  to banks  that have  total  assets in  excess of $500  million  and are
subject to regulatory supervision by the U.S. Government or state governments. A
Portfolio's  investments in commercial  paper of U.S. issuers will be limited to
(a)  obligations  rated  Prime-1  by  Moody's  or A-1  by  S&P  or  (b)  unrated
obligations  issued by  companies  having an  outstanding  unsecured  debt issue
currently  rated A or better by S&P. A description of various  commercial  paper
ratings and debt securities  ratings appears in the Appendix to this Prospectus.
A Portfolio's  investments in foreign short-term  instruments will be limited to
those that, in the opinion of the Subadviser,  equate generally to the standards
established for U.S. short-term instruments.
    

SELIGMAN HIGH-YIELD BOND PORTFOLIO

     The objective of this Portfolio is to produce maximum  current income.  The
Portfolio 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.

     The amount of outstanding high-yield,  lower-rated corporate securities has
recently  proliferated.  Based on industry  estimates,  the market grew from $20
billion in outstanding securities to in excess of $300 billion, principally over
the past ten  years,  a period  of  national  economic  expansion.  An  economic
downturn could  adversely  impact  issuers'  abilities to pay interest and repay
principal and could result in issuers' defaulting on such payments. The value of
the  Portfolio's  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 the security is downgraded, the Portfolio may retain the security.

     The Portfolio may invest 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  Portfolio  result  in
corresponding  fluctuations  and volatility in the net asset value of the shares
of the Portfolio.

     Lower-rated and non-rated  corporate bonds and notes in which the Portfolio
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 Portfolio
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.


                                      P-16
<PAGE>


   
     The  following  table  sets  forth  the  weighted  average  ratings  of the
Portfolio invested in debt securities, including convertible bonds, for the year
ended December 31, 1997. When securities received different ratings from S&P and
Moody's, the table reflects the lower rating.

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

     The Manager  will try to  minimize  the risk  inherent  in the  Portfolio's
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  Portfolio  is  appropriate  for you only if you 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
Portfolio's  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 Board of  Directors of the Fund without the vote of a majority of
the Portfolio's  outstanding voting  securities.  The Portfolio 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  Prime-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 Portfolio may invest temporarily for defensive purposes without limit
in the foregoing securities.

     In accordance with its objective of producing  maximum current income,  the
Portfolio 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 assurance that losses will not
occur and, as stated above,  an investment in the Portfolio 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.



SELIGMAN INCOME PORTFOLIO

     The  primary   investment   objective  of  this  Portfolio  is  to  provide
shareholders  with high current  income  consistent  with what is believed to be
prudent  risk of  capital;  secondarily,  the  Portfolio  seeks to  provide  the
possibility  of  improvement  in income and capital  value over the longer term.
Assets are invested in securities carefully selected in light of the Portfolio's
investment  objectives  and  diversified  to limit  risk.  The  distribution  of
investments  between  different types of securities is governed by a fundamental
policy, which can be changed only by the vote of the shareholders, that at least
25% of the  market  value of gross  assets  must at all times be in cash,  bonds
and/or preferred stocks.  Under an investment policy established by the Board of
Directors,  at  least  80%  of  assets  will  be  invested  in  income-producing
securities.

     Subject to that limitation,  assets may be invested in many different types
of securities, including money market instruments,  fixed-income securities such
as bonds,  debentures and preferred stocks,  senior securities  convertible into
common stocks, and common stocks.



                                      P-17
<PAGE>

     Convertible  bonds are  convertible at a stated exchange rate or price into
common  stock.  Before  conversion,   convertible   securities  are  similar  to
non-convertible  debt  securities in that they provide a steady stream of income
with  generally  higher yields than an issuer's  equity  securities.  The market
value of all debt securities, including convertible securities, tends to decline
as  interest  rates  increase  and to increase as  interest  rates  decline.  In
general,  convertible  securities may provide lower interest or dividend  yields
than non-convertible debt securities of similar quality, but they may also allow
investors to benefit from increases in the market price of the underlying common
stock. When the market price of the underlying common stock increases, the price
of the convertible security tends to reflect the increase. When the market price
of the underlying common stock declines, the convertible security tends to trade
on the  basis  of  yield,  and may not  depreciate  to the  same  extent  as the
underlying  common  stock.  In  an  issuer's  capital   structure,   convertible
securities are senior to common stocks. They are therefore of higher quality and
involve less risk than the issuer's  common stock,  but the extent to which risk
is reduced depends largely on the extent to which the convertible security sells
above its value as a fixed-income  security. In selecting convertible securities
for the Portfolio,  the Manager  evaluates such factors as economic and business
conditions involving the issuer, future earnings growth potential of the issuer,
potential  for  price  appreciation  of the  underlying  equity,  the  value  of
individual securities relative to other investment  alternatives,  trends in the
determinants of corporate profits and capability of management.  In evaluating a
convertible  security,  the Manager gives emphasis to the  attractiveness of the
underlying  common  stock and the capital  appreciation  opportunities  that the
convertible bonds present.  Convertible securities can be callable or redeemable
at the issuer's  discretion,  in which case the Manager  would be forced to seek
alternative investments. The Portfolio may invest in debt securities convertible
into  equity  securities  rated  as  low as CC by  S&P  or Ca by  Moody's.  Debt
securities rated below investment grade (frequently referred to as "junk bonds")
often have  speculative  characteristics  and will be subject to greater  market
fluctuations  and  risk  of loss  of  income  and  principal  than  higher-rated
securities.   A  description  of  credit  ratings  and  risks   associated  with
lower-rated debt securities is set forth in the Appendix to this Prospectus. The
Manager does not rely on the ratings of these  securities  in making  investment
decisions but performs its own analysis,  based on the factors  described above,
in light of the Portfolio's investment objectives.

     The  Portfolio  does not  expect  to invest  more than 5% of its  assets in
non-convertible  bonds, notes and debentures ("bonds") rated below BBB by S&P or
Baa by Moody's.  Although bonds rated in the fourth credit rating  category (BBB
or Baa) are commonly  referred to as investment grade, they may have speculative
characteristics.  The  Appendix to this  Prospectus  contains a  description  of
credit ratings and the risks associated with lower-rated debt securities,  which
tend to be more speculative and riskier than higher-rated debt securities.

   
     The  following  table  sets  forth  the  weighted  average  ratings  of the
Portfolio invested in debt securities, including convertible bonds, for the year
ended  December  31,  1997.  The balance of the  Portfolio is invested in equity
securities. When securities received different ratings from S&P and Moody's, the
table reflects the higher rating.

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

SELIGMAN LARGE-CAP VALUE PORTFOLIO
SELIGMAN SMALL-CAP VALUE PORTFOLIO

     The  investment   objective  of  these  Portfolios  is  long-term   capital
appreciation.  The  Seligman  Large-Cap  Value  Portfolio  seeks to achieve this
objective by investing at least 65% of its total assets in equity  securities of
"value" companies with large market  capitalization  (i.e., $2 billion or more),
at the time of purchase by the Portfolio. The Seligman Small-Cap Value Portfolio
seeks to achieve this objective by investing at least 65% of its total assets in
equity securities of "value" companies with small market  capitalization  (i.e.,
up to $1 billion), at the time of purchase by the Portfolio.
    



                                      P-18
<PAGE>

   
     A  "value"  company,  as  determined  by the  Manager,  is a  company  that
typically  displays,  among other things, a relatively low price-to-book  and/or
price-to-earnings  ratio. The Manager, in selecting securities for purchase by a
Portfolio,  may also consider,  among other  factors,  evaluation of a company's
growth prospects,  quality of management,  and liquidity.  The Manager will also
look for companies in which new management or proposed  restructuring  plans are
expected  by the  Manager to have a  positive  impact on the  company's  overall
business operations and productivity.

     Under normal market conditions,  each Portfolio anticipates that it will be
invested  primarily in equity securities of domestic  issuers,  including common
stock,  preferred  stock and stock  convertible  into or  exchangeable  for such
securities.  Each Portfolio  expects that no more than 15% of its assets will be
invested  in cash or  fixed-income  securities  except for  temporary  defensive
purposes.

     SMALL  COMPANY  INVESTMENT  RISK  FACTORS.  With  regard  to  the  Seligman
Small-Cap Value Portfolio,  investments in smaller companies may involve greater
risks  than  larger  companies,  such as  limited  product  lines,  markets  and
financial or managerial  resources.  Less  frequently  traded  securities may be
subject to more abrupt price movements than securities of larger companies.

     DERIVATIVES.  Each Portfolio may invest in derivatives  only for hedging or
investment  purposes. A Portfolio will not invest in derivatives for speculative
purposes,  i.e., where the derivative  investment exposes the Portfolio to undue
risk of loss,  such as where  the risk of loss is  greater  than the cost of the
investment.  The only types of derivatives in which the Seligman Large-Cap Value
Portfolio and the Seligman Small-Cap Value Portfolio are currently  permitted to
invest are stock purchase rights and warrants, and put options.

     The  Portfolios  may not invest in rights and  warrants  if, at the time of
acquisition,  the  investment  in rights and  warrants  would  exceed 5 % of the
Portfolio's net assets (valued at the lower of cost or market).

     OPTIONS  TRANSACTIONS.  Each of the Seligman  Large-Cap Value Portfolio and
the Seligman  Small-Cap  Value  Portfolio  may purchase put options on portfolio
securities in an attempt to provide a hedge against a decrease in the price of a
security  held by the  Portfolio.  A  Portfolio  will not  purchase  options for
speculative  purposes.  Purchasing a put option  gives a Portfolio  the right to
sell, and obligates the writer to buy, the  underlying  security at the exercise
price at any time during the option period.

     When a Portfolio  purchases  an option,  it is required to pay a premium to
the party writing the option and a commission to the broker  selling the option.
If the option is exercised by the Portfolio, the premium and the commission paid
may be  greater  than the  amount of the  brokerage  commission  charged  if the
security were to be purchased or sold  directly.  See  "Investment  Policies and
Restrictions" in the Statement of Additional Information.

     TEMPORARY  INVESTMENTS.  When the Manager  believes that market  conditions
warrant a temporary defensive position, a Portfolio may invest up to 100% of its
assets in short-term  instruments such as commercial paper, bank certificates of
deposit, bankers' acceptances,  or repurchase agreements for such securities and
securities of the U.S.  Government  and its agencies and  instrumentalities,  as
well as cash and cash equivalents denominated in foreign currencies. Investments
in domestic  bank  certificates  of deposit  and  bankers'  acceptances  will be
limited  to banks  that have  total  assets in  excess of $500  million  and are
subject to regulatory supervision by the U.S. Government or state governments. A
Portfolio's  investments in commercial  paper of U.S. issuers will be limited to
(a)  obligations  rated  Prime-1  by  Moody's  or A-1  by  S&P  or  (b)  unrated
obligations  issued by  companies  having an  outstanding  unsecured  debt issue
currently  rated A or better by S&P. A description of various  commercial  paper
ratings and debt securities  ratings appears in the Appendix to this Prospectus.
A Portfolio's  investments in foreign short-term  instruments will be limited to
those that,  in the opinion of the Manager,  equate  generally to the  standards
established for U.S. short-term instruments.

    
OTHER INVESTMENT POLICIES

     The Fund's Portfolios may invest for either the long or short term in their
efforts to attain  their  objectives,  and  changes in  investments  may be made
whenever  considered  advisable  by the Manager or, in the case of the  Seligman
Henderson  Portfolios,  the Subadviser.  Except as otherwise noted,  each of the
Portfolios  may engage in  transactions  involving the types of  securities  and
investment   strategies   described  below.   Further  information  about  these
strategies is included in the Fund's Statement of Additional Information.

                                      P-19
<PAGE>

     REPURCHASE AGREEMENTS. Each Portfolio may hold cash or cash equivalents and
may enter  into  repurchase  agreements  with  respect to  securities;  normally
repurchase  agreements  relate to money  market  obligations  backed by the full
faith and credit of the U.S. Government.  Repurchase agreements are transactions
in which an investor (e.g., any of the Fund's  Portfolios)  purchases a security
from a bank,  recognized  securities dealer, or other financial  institution and
simultaneously  commits to resell that security to such institution at an agreed
upon price,  date and market rate of  interest  unrelated  to the coupon rate or
maturity of the purchased  security.  A repurchase  agreement  thus involves the
obligation of the bank or securities  dealer to pay the agreed upon price on the
date  agreed  to,  which  obligation  is in effect  secured  by the value of the
underlying security held by the Portfolio.  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. Although repurchase agreements carry certain risks not associated with
direct  investments  in  securities,   each  Portfolio  intends  to  enter  into
repurchase  agreements  only with  financial  institutions  believed  to present
minimum  credit risks in accordance  with  guidelines  established by the Fund's
Board of Directors.  The  creditworthiness of such institutions will be reviewed
and  monitored  under the general  supervision  of the Board of  Directors.  The
Portfolios will invest only in repurchase agreements collateralized in an amount
at least  equal at all  times  to the  purchase  price  plus  accrued  interest.
Repurchase  agreements usually are for short periods,  such as one week or less,
but may be for  longer  periods.  No  Portfolio  will  enter  into a  repurchase
agreement with a maturity of more than seven days if, as a result, more than 15%
of the  value  of its net  assets  would  then be  invested  in such  repurchase
agreements and other illiquid investments.

     ILLIQUID  SECURITIES.  Other than the Seligman Cash  Management  Portfolio,
each  Portfolio  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.  Each  Portfolio,  other than the
Seligman Cash Management Portfolio,  may purchase restricted securities that can
be offered and sold to "qualified  institutional  buyers" under Rule 144A of the
1933 Act, and 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 the Board of  Directors  make this
determination, it 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 restricted  securities offered
and sold under Rule 144A will develop.  This investment  practice could have the
effect of increasing  the level of illiquidity in a Portfolio to the extent that
qualified institutional buyers become for a time uninterested in purchasing Rule
144A securities.

     SHORT SALES. Each of the Seligman Henderson  Portfolios may sell securities
short "against-the-box." A short sale "against-the-box" is a short sale in which
the Portfolio  owns an equal amount of the  securities  sold short or securities
convertible into or exchangeable  without payment of further  consideration  for
securities  of the same issue as, and equal in amount  to, the  securities  sold
short.

   
     FOREIGN SECURITIES.  Each of the Fund's Portfolios may invest in commercial
paper and  certificates  of deposit  issued by  foreign  banks and may invest in
other  securities of foreign issuers  directly or through ADRs, ADSs, EDRs, GDRs
or GDSs. 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 securities may not be
as liquid as U.S.  securities.  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 U.S.  Investments
in foreign  securities may also be subject to local economic or political risks,
political  instability and possible  nationalization of issuers. A Portfolio may
invest up to 10% of its total assets in foreign  securities (except the Seligman
Henderson  Portfolios,  which  may  invest up to 100% of their  total  assets in
foreign  securities),  except  that  this 10% limit  does not  apply to  foreign
securities  held  through  ADRs,  ADSs,  EDRs,  GDRs or GDSs (as defined on page
P-13),  or to commercial  paper and  certificates  of deposit  issued by foreign
banks.
    

     LENDING OF PORTFOLIO SECURITIES AND BORROWING. Other than the Seligman Cash
Management  Portfolio,   each  of  the  Fund's  Portfolios  may  lend  portfolio
securities to banks or other institutional  borrowers,  provided that securities
loaned by each of the Seligman Henderson Portfolios may not exceed 331/3% of the
Portfolios'  total assets taken at market value. The Fund's  Portfolios will not
lend  portfolio  securities to any  institutions  affiliated  with

                                      P-20
<PAGE>

the Fund.  The borrower  must maintain  with the Fund's  custodian  bank cash or
equivalent  collateral  equal  to at  least  100%  of the  market  value  of the
securities  loaned.  During  the time  portfolio  securities  are on  loan,  the
borrower is required to pay an amount equal to any dividends or interest paid on
the securities to the lending Portfolio.  In addition, the lending Portfolio 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 could involve the risk of delays in receiving  additional  collateral
or in the recovery of  securities  and possible  loss of rights in collateral in
the event that a borrower fails financially.

   
     Except as noted below,  a Portfolio  may not borrow money except from banks
for  temporary  purposes  (but  not  for the  purpose  of  purchasing  portfolio
securities)  in an amount not to exceed 10% of the value of the total  assets of
that  Portfolio.  In addition,  the Seligman  Frontier  Portfolio,  the Seligman
High-Yield  Bond Portfolio,  the Seligman  Large-Cap  Value  Portfolio,  and the
Seligman Small-Cap Portfolio will not purchase additional  portfolio  securities
if that Portfolio has outstanding borrowings in excess of 5% of the value of its
total assets.

     The Seligman Capital  Portfolio,  the Seligman Common Stock Portfolio,  the
Seligman Communications and Information Portfolio,  the Seligman Large-Cap Value
Portfolio,  and the Seligman  Small-Cap  Value  Portfolio  may from time to time
borrow money in order to purchase  securities.  Borrowings may be made only from
banks and each of these  Portfolios may not borrow in excess of one-third of the
market  value of its assets,  less  liabilities  other than such  borrowing,  or
pledge  more  than  10% (15%  for the  Seligman  Large-Cap  Value  and  Seligman
Small-Cap  Value  Portfolios) of its total assets,  taken at cost, to secure the
borrowing.  Current asset value  coverage of three times any amount  borrowed by
the  respective  Portfolio is required at all times.  Borrowed  money creates an
opportunity  for greater  capital  appreciation,  but at the same time increases
exposure to capital risk. The net cost of any money borrowed would be an expense
that  otherwise  would  not be  incurred,  and  this  expense  will  reduce  the
Portfolio's net investment income in any given period.  Any gain in the value of
securities  purchased  with  money  borrowed  to an amount in excess of  amounts
borrowed plus interest would cause the net asset value of the Portfolio's shares
to increase more than otherwise  would be the case.  Conversely,  any decline in
the value of  securities  purchased to an amount below the amount  borrowed plus
interest  would cause the net asset value to decrease more than would  otherwise
be the case.
    

     Each of the  Seligman  Henderson  Portfolios  may from time to time  borrow
money for  temporary,  extraordinary  or  emergency  purposes and may invest the
funds in additional  securities.  Borrowings for the purchase of securities will
not exceed 5% of the  Portfolio's  total  assets and will be made at  prevailing
interest rates.

     WHEN-ISSUED  SECURITIES.  The  Seligman  Bond  Portfolio  and the  Seligman
High-Yield  Bond  Portfolio  may purchase  securities  on a  when-issued  basis.
Settlement of such  transactions  (i.e.,  delivery of securities  and payment of
purchase  price)  normally  takes  place  within  45 days  after the date of the
commitment to purchase.  Although the Seligman  High-Yield  Bond  Portfolio will
purchase a security on a  when-issued  basis only with the intention of actually
acquiring the  securities,  the Portfolio may sell these  securities  before the
purchase settlement date if it is deemed advisable.

     At the time a Portfolio  enters  into such a  commitment  both  payment and
interest  terms will be established  prior to  settlement;  there is a risk that
prevailing  interest  rates on the  settlement  date  will be  greater  than the
interest rate terms  established  at the time the  commitment  was entered into.
When-issued  securities  are  subject  to  changes  in  market  value  prior  to
settlement  based upon changes,  real or  anticipated,  in the level of interest
rates or  creditworthiness  of the issuer. If a Portfolio remains  substantially
fully  invested  at  the  same  time  that  it  has  purchased  securities  on a
when-issued  basis,  the market value of that  Portfolio's  assets may fluctuate
more  than  otherwise  would be the case.  For this  reason,  accounts  for each
Portfolio  will be  established  with the Fund's  custodian  consisting  of cash
and/or liquid high-grade debt securities equal to the amount of each Portfolio's
when-issued  commitment;  these  accounts will be valued each day and additional
cash and/or liquid high-grade debt securities will be added to an account in the
event that the current value of the when-issued  commitment increases.  When the
time  comes  to pay for  when-issued  securities,  a  Portfolio  will  meet  its
respective obligations from then available cash flow, sale of securities held in
the  separate  account,  sale  of  other  securities,  or from  the  sale of the
when-issued securities themselves (which may have a value greater or less than a
Portfolio's  payment  obligations).  Sale  of  securities  to  meet  when-issued
commitments  carries with it a greater  potential for the realization of capital
gain or loss.


                                      P-21
<PAGE>

MANAGEMENT SERVICES

     The Board of Directors  provides broad  supervision over the affairs of the
Fund. Pursuant to management  agreements approved by the Board of Directors (the
"Management Agreements"),  the Manager manages the investments of each Portfolio
and administers their business and other affairs.  The address of the Manager is
100 Park Avenue, New York, New York 10017.

     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.

   
     For its services under the Management  Agreements,  the Manager  receives a
fee from each Portfolio, calculated daily and payable monthly, at an annual rate
of .40% of the average daily net assets of the Seligman Bond Portfolio, Seligman
Capital  Portfolio,  Seligman Cash Management  Portfolio,  Seligman Common Stock
Portfolio  and  Seligman  Income  Portfolio;  at an  annual  rate of .50% of the
average daily net assets of the Seligman High-Yield Bond Portfolio; at an annual
rate of .75% of the average daily net assets of the Seligman  Communications and
Information Portfolio and Seligman Frontier Portfolio; at an annual rate of .80%
of the average daily net assets of the Seligman Large-Cap Value Portfolio on the
first $500  million of its net assets,  .70% of the average  daily net assets on
its next $500 million of net assets and .60% of the average  daily net assets in
excess of $1 billion;  and at an annual  rate of 1.00% of the average  daily net
assets of the Seligman  Small-Cap  Value  Portfolio on the first $500 million of
its net assets, .90% of the average daily net assets on its next $500 million of
net assets and .80% of the average daily net assets in excess of $1 billion.
    

     Each of the  Seligman  Henderson  Portfolios  pays the Manager a management
fee,  calculated daily and payable monthly,  equal to an annual rate of 1.00% of
the  average  daily net assets of each  Portfolio,  of which .90% is paid to the
Subadviser for the services  described below. This management fee is higher than
that of the other Portfolios of the Fund and of most investment companies but is
comparable to that of most global or international equity funds.

   
     The  Manager  voluntarily  has  agreed to waive its  management  fee and to
reimburse  all  expenses  for  the  Seligman  Cash  Management  Portfolio,   has
voluntarily  agreed to reimburse  expenses  (other than the management fee) that
exceed .20% per annum of the average  daily net assets for each of the  Seligman
Bond,  Seligman  Capital,  Seligman Common Stock,  Seligman  Communications  and
Information,  Seligman Frontier,  Seligman  High-Yield Bond, and Seligman Income
Portfolios;  and has  voluntarily  agreed to reimburse  expenses  (including the
management  fee) that  exceed  .80% and  1.00%,  respectively,  of the  Seligman
Large-Cap Value and Seligman  Small-Cap Value Portfolios.  There is no assurance
that the Manager will continue this policy in the future.
    

     The Manager and Subadviser voluntarily agreed to reimburse certain expenses
(other than the management  fee) that exceed .40% per annum of the average daily
net assets for each of the Seligman Henderson Portfolios.  There is no assurance
that the Manager and Subadviser will continue this policy in the future.

   
     The  management  fee and  total  expenses  paid by each  Portfolio  (except
Seligman Large-Cap Value Portfolio and Seligman Small-Cap Value Portfolio,  each
of which  commenced  operations  on May 1,  1998),  expressed  as an  annualized
percentage of average daily net assets of such  Portfolio,  are presented in the
following table for the fiscal year ended December 31, 1997.
    



                                      P-22
<PAGE>
<TABLE>
<CAPTION>
   
                                                           MANAGEMENT FEE RATE           EXPENSE RATIOS FOR
                                                           FOR THE YEAR ENDED              THE YEAR ENDED
      PORTFOLIO                                                 12/31/97                      12/31/97*
      ---------                                          ----------------------        -----------------------
<S>                                                               <C>                          <C> 
      Seligman Bond Portfolio ..........................           .40%                         .60%
      Seligman Capital Portfolio .......................           .40                          .60
      Seligman Cash Management Portfolio ...............            -*                           --
      Seligman Common Stock Portfolio ..................           .40                          .53
      Seligman Communications and Information                                             
        Portfolio ......................................           .75                          .87
      Seligman Frontier Portfolio ......................           .75                          .89
      Seligman Henderson Global                                                           
        Growth Opportunities Portfolio .................          1.00                         1.40
      Seligman Henderson Global Smaller                                                   
        Companies Portfolio ............................          1.00                         1.40
      Seligman Henderson Global                                                           
        Technology Portfolio ...........................          1.00                         1.40
      Seligman Henderson International Portfolio .......          1.00                         1.40
      Seligman High-Yield Bond Portfolio ...............           .50                          .70
      Seligman Income Portfolio ........................           .40                          .60
</TABLE>

- -------------
    * During the year ended December 31, 1997, the Manager,  at its  discretion,
      waived all of its fees for the Seligman Cash Management Portfolio, and the
      Manager  and/or  Subadviser  elected to reimburse  all or a portion of the
      expenses for the Seligman  Bond  Portfolio,  Seligman  Capital  Portfolio,
      Global Growth Opportunities Portfolio, Global Smaller Companies Portfolio,
      Global Technology Portfolio,  International Portfolio, Seligman High-Yield
      Bond Portfolio and Seligman Income Portfolio.

     The Manager also serves as manager of seventeen other investment companies,
which,  together  with the Fund,  make up the  "Seligman  Group." The  aggregate
assets of the Seligman Group were approximately $ billion at March 31, 1998. The
Manager also provides investment management or advice to institutional and other
accounts having an aggregate value of approximately $ billion at March 31, 1998.
    

     The Fund bears all expenses of its organization,  operations,  and business
not specifically  assumed or agreed to be paid by the Manager as provided in the
Management Agreements. In particular, but without limiting the generality of the
foregoing,  the Fund pays brokerage  commissions,  custody expenses and expenses
relating to computation  of the Fund's net asset value per share,  including the
cost of any equipment or services used for obtaining price quotations; legal and
accounting  fees and expenses;  fees and expenses of registering  the Fund under
the federal  securities  laws;  taxes or  governmental  fees  payable by or with
respect to the Fund to federal, state, or other governmental agencies,  domestic
or foreign,  including  stamp or other  transfer  taxes;  fees,  dues, and other
expenses  incurred  in  connection  with  the  Fund's  membership  in any  trade
association or other investment organization;  and such nonrecurring expenses as
may arise, including litigation costs.

     THE SUBADVISER.  Seligman Henderson Co. serves as Subadviser to each of the
Seligman  Henderson  Portfolios  pursuant to Subadvisory  Agreements between the
Manager and the  Subadviser  (the  "Subadvisory  Agreements").  The  Subadvisory
Agreements  provide that the  Subadviser  will supervise and direct the Seligman
Henderson   Portfolios'   international   investments  in  accordance  with  the
Portfolios' investment objectives, policies and restrictions. Seligman Henderson
Co. was  created  to provide  international  and  global  investment  management
services to  institutional  investors and  investment  companies in the U.S. The
address of the Subadviser is 100 Park Avenue, New York, New York 10017.

   
     PORTFOLIO  MANAGEMENT.  Leonard J.  Lovito,  a Vice  President,  Investment
Officer  of the  Manager,  serves as a Vice  President  of the Fund and has been
Portfolio  Manager of the Seligman Bond  Portfolio  since January 1, 1994 and of
the Seligman Cash Management  Portfolio since January 1, 1995. Mr. Lovito joined
the Manager in December 1984 as a Trader, was named Assistant Vice President and
Portfolio  Manager in January  1987 and Vice  President,  Investment  Officer in
August 1991. He also serves as Vice President and Portfolio  Manager of Seligman
Cash  Management  Fund,  Inc.,  and Vice  President of Seligman High Income Fund
Series and Portfolio Manager of its Seligman U.S. Government  Securities Series.
The Portfolio Manager's discussion of the Seligman Bond Portfolio's performance,
as well as a line graph illustrating comparative performance information between
the Seligman Bond
    

                                      P-23
<PAGE>

   
Portfolio,  the Lehman Brothers  Government Bond Index, and the Lipper Corporate
Debt BBB-Rated  Funds  Average,  is included in the Fund's 1997 Annual Report to
Shareholders.

     Richard R. Schmaltz, who joined the Manager as Managing Director,  Director
of Investments in September  1996, is primarily  responsible  for the day-to-day
management of the Seligman Capital  Portfolio as a member of the Seligman Growth
Team. Mr.  Schmaltz was named a Director of the Manager in November  1997.  From
May 1993 to September  1996, Mr. Schmaltz was Director,  Investment  Research at
Neuberger and Berman.  Prior thereto,  Mr. Schmaltz was Executive Vice President
of McGlinn  Capital.  Mr.  Schmaltz is also  responsible  for the  management of
Seligman Capital Fund, Inc. and Seligman Growth Fund, Inc. Additionally,  he has
responsibility  for  directing  the domestic  investments  of the Global  Growth
Opportunities Portfolio and Seligman Henderson Global Growth Opportunities Fund,
a series of Seligman  Henderson  Global Fund Series,  Inc. A  discussion  of the
Seligman Capital Portfolio's  performance,  as well as a line graph illustrating
comparative performance information between the Seligman Capital Portfolio,  the
Standard  &  Poor's  500  Composite   Stock  Price  Index  the  Lipper   Capital
Appreciation  Funds Average,  the Lipper Mid Cap Funds Average,  and the Russell
Mid  Cap  Growth  Index,  is  included  in the  Fund's  1997  Annual  Report  to
Shareholders.

     Charles C. Smith, Jr., a Managing Director of the Manager, serves as a Vice
President  of the Fund and has been  Portfolio  Manager of the  Seligman  Common
Stock  Portfolio and the Seligman  Income  Portfolio  since  December  1991. Mr.
Smith,  joined the  Manager in 1985 as Vice  President,  Investment  Officer and
became Senior Vice President,  Senior Investment  Officer in 1992 and a Managing
Director in January 1994. He also serves as Vice President and Portfolio Manager
of  Seligman   Common  Stock  Fund,   Inc.,   Seligman  Income  Fund,  Inc.  and
Tri-Continental Corporation.

     Odette S. Galli, Senior Vice President,  Investment Officer of the Manager,
serves as Co-Portfolio Manager of the Seligman Common Stock Portfolio. Ms. Galli
joined the Manager in August 1993 as a Vice  President,  Investment  Officer and
was named Senior Vice  President,  Investment  Officer in December  1997. She is
also   Co-Portfolio   Manager  of  Seligman   Common   Stock  Fund,   Inc.   and
Tri-Continental  Corporation.  Prior to 1993,  Ms. Galli was an equity  research
analyst  at Morgan  Stanley & Co.  The  Portfolio  Managers'  discussion  of the
Seligman  Common  Stock  Portfolio's  performance,  as  well  as  a  line  graph
illustrating  comparative  performance  information  between the Seligman Common
Stock  Portfolio,  the Standard & Poor's 500 Composite Stock Price Index and the
Lipper  Growth and Income Funds  Average,  is included in the Fund's 1997 Annual
Report to Shareholders.

     Rodney D.  Collins,  Vice  President,  Investment  Officer of the  Manager,
serves as  Co-Portfolio  Manager of the Seligman Income  Portfolio.  Mr. Collins
joined the Manager in 1992 as a Vice President,  Investment  Officer. He is also
Co-Portfolio  Manager of Seligman  Income  Fund,  Inc. The  Portfolio  Managers'
discussion of the Seligman  Income  Portfolio's  performance,  as well as a line
graph  illustrating  comparative  performance  information  between the Seligman
Income  Portfolio,  the Standard & Poor's 500 Composite  Stock Price Index,  the
Lehman  Brothers  Aggregate Bond Index and the Lipper Income Funds  Average,  is
included in the Fund's 1997 Annual Report to Shareholders.

     Paul H. Wick, a Director and Managing Director of the Manager,  serves as a
Vice  President  of the  Fund  and  is the  Portfolio  Manager  of the  Seligman
Communications  and  Information  Portfolio  and a  Co-Portfolio  Manager of the
Global  Technology  Portfolio.  Mr.  Wick joined the Manager in August 1987 as a
Vice President,  Investment Officer and was named a Managing Director in January
1995.  He also  serves as Vice  President  and  Portfolio  Manager  of  Seligman
Communications  and  Information  Fund,  Inc.,  and Vice  President  of Seligman
Henderson  Global Fund  Series,  Inc. and  Co-Portfolio  Manager of its Seligman
Henderson  Global  Technology  Fund. The Portfolio  Manager's  discussion of the
Seligman  Communications and Information Portfolio's  performance,  as well as a
line  graph   illustrating   comparative   information   between  the   Seligman
Communications  and Information  Portfolio,  the Standard & Poor's 500 Composite
Stock  Price Index and the Lipper  Science  and  Technology  Funds  Average,  is
included in the Fund's 1997 Annual Report to Shareholders.

     Arsen Mrakovcic, a Managing Director of the Manager, is a Vice President of
the Fund and Portfolio Manager of the Seligman Frontier  Portfolio since October
1, 1995 and Co-Portfolio Manager of the Global Smaller Companies Portfolio.  Mr.
Mrakovcic,  who joined the Manager in 1992 as a Portfolio  Assistant,  was named
Vice President, Investment Officer on January 1, 1995 and a Managing Director on
January 1, 1996.  Mr.  Mrakovcic  also serves as Vice  President  and  Portfolio
Manager of Seligman Frontier Fund, Inc. and Vice President of Seligman Henderson
Global Fund Series,  Inc.  and  Co-Portfolio  Manager of its Seligman  Henderson
Global  Smaller  Companies  Fund.  The  Portfolio  Manager's  discussion  of the
Seligman Frontier Portfolio's performance,  as well as a line graph illustrating
comparative  information  between the Seligman  Frontier  Portfolio,  the Lipper
Small Cap Fund Index,  the Lipper  Small Cap Funds  Average,  the  Russell  2000
Index,  and the Russell 2000 Growth Index, is included in the Fund's 1997 Annual
Report to Shareholders.
    

                                      P-24
<PAGE>

   
     Daniel  J.  Charleston,  a  Managing  Director  of the  Manager,  is a Vice
President  of the  Fund  and has  been the  Portfolio  Manager  of the  Seligman
High-Yield  Bond Portfolio  since its inception on May 1, 1995.  Mr.  Charleston
joined the Manager in 1987 as an  Assistant  Portfolio  Manager,  was named Vice
President,  Investment  Officer in August 1991 and Managing  Director in January
1996.  He also serves as Vice  President of Seligman High Income Fund Series and
Portfolio  Manager  of  its  Seligman  High-Yield  Bond  Series.  The  Portfolio
Manager's discussion of the Seligman High-Yield Bond Portfolio's performance, as
well as a line graph illustrating  comparative  information between the Seligman
High-Yield  Bond  Portfolio,  the Lipper  High-Yield  Bond  Funds  Index and the
Merrill Lynch  High-Yield  Master  Index,  is included in the Fund's 1997 Annual
Report to Shareholders.

     The Subadviser's  International Policy Group has overall responsibility for
directing  and  overseeing  all aspects of  investment  activity for each of the
Seligman  Henderson  Portfolios and provides  international  investment  policy,
including country weightings,  asset allocations and industry sector guidelines,
as appropriate.  Mr. Iain C. Clark,  Chief Investment Officer of the Subadviser,
is a Vice President of the Fund and is responsible for the day-to-day investment
activity of the International Portfolio and the international investments of the
Global  Smaller  Companies  Portfolio.  Mr. Clark,  who joined the Subadviser in
1992,  has been a Director and Senior  Portfolio  Manager of  Henderson  plc and
Director of Henderson  International,  Ltd. since 1985 and Secretary,  Treasurer
and Vice  President of Henderson  International,  Inc.  since 1991.  Mr. Clark's
discussion of the International Portfolio's performance, as well as a line graph
illustrating  comparative  performance  information  between  the  International
Portfolio,  the Lipper  International Funds Average,  the Morgan Stanley Capital
International  ("MSCI") World Index and the MSCI  Europe-Asia-Far East Index, is
included  in the  Fund's  1997  Annual  Report to  Shareholders.  The  Portfolio
Managers' discussion of the Global Smaller Companies Portfolio's performance, as
well as a line graph  illustrating  comparative  information  between the Global
Smaller  Companies  Portfolio,  the MSCI World Index, The Saloman Brothers World
EMI Index, and the Lipper Global Small Company Funds Average, is included in the
Fund's 1997 Annual Report to Shareholders.

     Brian  Ashford-Russell,  a  Portfolio  Manager  with  Henderson  plc  since
February 1993, is a Vice President of the Fund and  Co-Portfolio  Manager of the
Global Technology Portfolio. Prior to joining Henderson plc, Mr. Ashford-Russell
was a Portfolio  Manager with Touche Remnant & Co. Mr.  Ashford-Russell  and Mr.
Wick have  responsibility  for directing and  overseeing the  international  and
domestic investments, respectively, of the Global Technology Portfolio including
the  selection of  individual  securities  for purchase or sale.  The  Portfolio
Managers' discussion of the Global Technology Portfolio's  performance,  as well
as  a  line  graph  illustrating  comparative  performance  between  the  Global
Technology Portfolio,  the Lipper Global Funds Average and the MSCI World Index,
is included in the Fund's 1997 Annual Report to Shareholders.

     Nitin Mehta, a Portfolio  Manager with Henderson plc since  September 1994,
is a Vice  President of the Fund and  Co-Portfolio  Manager of the Global Growth
Opportunities Portfolio.  From May 1993 to September 1994, Mr. Mehta was Head of
Currency Management and Derivatives at Quorum Capital Management.  From February
1993 to May  1993,  he was an  Investment  Officer  with  International  Finance
Corporation.  From July 1986 to March  1992,  he was  Director  of  Equities  at
Shearson  Lehman  Global  Asset  Management.  Mr.  Mehta and Mr.  Schmaltz  have
responsibility  for  directing and  overseeing  the  international  and domestic
investments,   respectively,   of  the  Global  Growth  Opportunities  Portfolio
including  the  selection of  individual  securities  for purchase or sale.  The
Portfolio Managers'  discussion of the Global Growth  Opportunities  Portfolio's
performance,  as  well  as a line  graph  illustrating  comparative  performance
information between the Global Growth Opportunities Portfolio, the Lipper Global
Funds  Average and the MSCI World  Index,  is included in the Fund's 1997 Annual
Report to Shareholders.

     Neil T. Eigen, a Managing Director of the Manager and Head of the Manager's
Value Investment Team, is a Vice President of the Fund and Portfolio  Manager of
the  Seligman  Large-Cap  Value  Portfolio  and  the  Seligman  Small-Cap  Value
Portfolio since each Portfolio's  inception on May 1, 1998. Mr. Eigen joined the
Manager  in his  current  position  on January  3,  1997.  Prior to joining  the
Manager, Mr. Eigen served as Senior Managing Director,  Chief Investment Officer
and Director of Equity  Investing at Bear Stearns  Asset  Management.  Mr. Eigen
also serves as Vice  President  and  Portfolio  Manager of  Seligman  Value Fund
Series, Inc.
    

                                      P-25
<PAGE>

   
     Richard  S.  Rosen,  a Senior  Vice  President,  Investment  Officer of the
Manager,  is Co-Portfolio  Manager of the Seligman Large-Cap Value Portfolio and
the Seligman  Small-Cap Value Portfolio since each Portfolio's  inception on May
1, 1998.  Mr.  Rosen  joined the Manager in his  current  position on January 3,
1997. Prior to joining the Manager,  Mr. Rosen served as a Managing Director and
Portfolio  Manager at Bear Stearns  Asset  Management.  Mr. Rosen also serves as
Co-Portfolio Manager of Seligman Value Fund Series, Inc. The Portfolio Managers'
discussion of the performances of the Seligman Large-Cap Value Portfolio and the
Seligman  Small-Cap  Value  Portfolio,  as  well  as  line  graphs  illustrating
comparative performance information between the Portfolios and appropriate broad
based indices will be included in the Fund's next Annual Report to Shareholders.

     Copies of the Fund's 1997 Annual  Report to  Shareholders  may be obtained,
without  charge,  by  calling or writing  the Fund at the  telephone  numbers or
address listed on the front page of this Prospectus.
    

PORTFOLIO TRANSACTIONS, PORTFOLIO TURNOVER AND VALUATION

     PORTFOLIO TRANSACTIONS. In directing transactions involving exchange-listed
securities,  the Manager (or in the case of the Seligman  Henderson  Portfolios,
the Manager or the Subadviser) 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 brokers or dealers to the Manager
or the  Subadviser  for its use. In  addition,  the Manager and  Subadviser  are
authorized to place orders with brokers who provide supplemental  investment and
market  research and security  and economic  analysis,  although the use of such
brokers may result in a higher  brokerage  charge to a Portfolio than the use of
brokers  selected  solely on the basis of seeking the most  favorable  price and
execution  although  such  research and  analysis  received may be useful to the
Manager or the Subadviser in connection  with their services to other clients as
well  as to  the  Portfolios.  Portfolio  transactions  for  the  Seligman  Bond
Portfolio,  Seligman  Cash  Management  Portfolio and Seligman  High-Yield  Bond
Portfolio,   which   invest  in  debt   securities   generally   traded  in  the
over-the-counter market, and transactions by any of the other Portfolios in debt
securities  traded on a  "principal  basis" in the  over-the-counter  market are
normally   directed  by  the  Manager  or  the  Subadviser  to  dealers  in  the
over-the-counter market, which dealers generally act as principals for their own
accounts.

     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 Directors may determine, the Manager or
Subadviser  may consider  sales of the Canada Life Accounts and, if permitted by
applicable  laws,  of the other Funds in the  Seligman  Group as a factor in the
selection of brokers or dealers to execute portfolio transactions for the Fund.

     PORTFOLIO  TURNOVER.  A change in securities held by any Portfolio is known
as  "portfolio  turnover"  and may  involve  the  payment  by the Fund 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.
Changes  will be made  whenever  the  Manager  or,  in the case of the  Seligman
Henderson Portfolios, the Subadviser,  believes such changes will strengthen any
Portfolio's position.  Portfolio turnover will vary from year to year as well as
within a year and may exceed 100%.

   
     VALUATION.  The net asset  value of the  shares of each  Portfolio  will be
computed each day, Monday through Friday,  as of the close of regular trading of
the New York Stock Exchange (normally,  4:00 p.m. Eastern time), on days the New
York Stock Exchange is open for trading.  Securities of each  Portfolio  (except
Seligman Cash  Management  Portfolio) are valued at current market value,  or in
the absence thereof, at fair value in accordance with procedures approved by the
Board of Directors. For purposes of determining the net asset value per share of
each of the  Seligman  Henderson  Portfolios,  securities  traded  on a  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.  Any
securities  for which recent  market  quotations  are not readily  available are
valued at fair value  determined in accordance with  procedures  approved by the
Board  of  Directors.  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 of such date unless
the Board  determines  that this  amortized  cost value does not represent  fair
market value.
    

     Securities held by the Seligman Cash Management  Portfolio are valued using
the  amortized  cost method.  This method is designed to stabilize the net asset
value of that Portfolio at $1.00 per share.  The Board of Directors will

                                      P-26
<PAGE>

monitor closely the  stabilization of the net asset value at $1.00 per share and
has adopted  procedures  to  facilitate  such  stabilization.  More  information
regarding  this method of valuation is contained in the  Statement of Additional
Information.


DIVIDENDS, DISTRIBUTIONS AND TAXES

     Each Portfolio of the Fund has qualified and intends to continue to qualify
as a "regulated  investment  company"  under certain  provisions of the Internal
Revenue Code of 1986, as amended (the "Code"). Under such provisions, the Fund's
Portfolios  will  be  subject  to  federal  income  tax  only  with  respect  to
undistributed  net investment  income and net realized capital gain. Each of the
Fund's  Portfolios  will be  treated  as a  separate  entity.  Dividends  on the
Seligman Cash Management Portfolio will be declared daily and reinvested monthly
in  additional  full and  fractional  shares  of the  Seligman  Cash  Management
Portfolio;  it is not expected that this Portfolio  will realize  capital gains.
Dividends and capital gain  distributions from each of the other Portfolios will
be declared and paid  annually and will be  reinvested at the net asset value of
such shares of the Portfolio  that declared such dividend or gain  distribution.
Dividend and gain distributions are generally not currently taxable to owners of
the  VA,  CLAA  or  VCA-9  Contracts;  further  information  regarding  the  tax
consequences  of an  investment  in  the  Fund  is  contained  in  the  separate
prospectus or disclosure documents of the Canada Life Accounts and VCA-9.


PURCHASES AND REDEMPTIONS

     Shares of the  Portfolios  will be offered only to Canada Life Accounts and
VCA-9. Shares of the Fund will be purchased and redeemed by Canada Life Accounts
and VCA-9 at net asset value, without charge.  However, the Canada Life Accounts
and VCA-9 are sold subject to certain  fees and charges.  These fees and charges
for the  Canada  Life  Accounts  and  VCA-9  are  more  fully  described  in the
prospectuses  or  disclosure  documents for Canada Life Accounts and VCA-9 which
should be read  together  with  this  Prospectus,  as  applicable.  Purchase  or
redemption  requests  received by the Fund prior to 4:00 p.m.  Eastern  time are
effected at the applicable  Portfolio's net asset value per share  calculated on
the date such purchase or redemption requests are received.

     Any inquiries  regarding the Fund should be directed in writing to Seligman
Financial  Services,  Inc.,  100 Park Avenue,  New York,  New York 10017,  or by
calling  the  telephone  numbers  listed  on the front  page of the  Prospectus.
Seligman Financial Services, Inc. is an affiliate of the Manager and distributor
of the Fund's shares.


CUSTODIANS AND TRANSFER AGENT

     Investors  Fiduciary  Trust  Company,  127 West 10th  Street,  Kansas City,
Missouri 64105, acts as custodian of the Fund's assets, except for the assets of
each of the  Seligman  Henderson  Portfolios,  as well as transfer  and dividend
disbursing agent.

     Morgan Stanley Trust  Company,  One Pierrepont  Plaza,  Brooklyn,  New York
11201,  acts as  custodian  of the  assets  of each  of the  Seligman  Henderson
Portfolios.


ORGANIZATION AND CAPITALIZATION

   
     The  Fund  is  an  open-end  diversified   management   investment  company
incorporated  under the laws of the state of Maryland on June 24, 1987 under the
name Seligman  Mutual  Benefit  Portfolios,  Inc. The Fund's name was changed to
Seligman  Portfolios,  Inc.  on April  15,  1993.  Directors  of the  Fund  have
authority  to issue a total of  1,000,000,000  shares,  each with a par value of
$.001. The Fund presently has fourteen  separate series of common stock, each of
which maintains a separate investment portfolio, designated as follows: Seligman
Bond Portfolio,  Seligman Capital Portfolio, Seligman Cash Management Portfolio,
Seligman  Common  Stock  Portfolio,   Seligman  Communications  and  Information
Portfolio,   Seligman  Frontier  Portfolio,  Seligman  Henderson  Global  Growth
Opportunities Portfolio,  Seligman Henderson Global Smaller Companies Portfolio,
Seligman Henderson Global Technology Portfolio, Seligman Henderson International
Portfolio,  Seligman  High-Yield  Bond  Portfolio,  Seligman  Income  Portfolio,
Seligman Large-Cap Value Portfolio, and Seligman Small-Cap Value Portfolio. Each
share represents an equal  proportionate  interest in the respective  series and
shares  entitle their holders to one vote per share.  Shares have  noncumulative
voting rights, do not have preemptive or subscription  rights,  are transferable
and are fully paid and non-assessable.  In accordance with current policy of the
SEC,  holders of the Canada Life  Accounts  and VCA-9 have the right to instruct
Canada  Life and MBL Life,  respectively,  as to voting Fund shares held by such
Canada Life Accounts and VCA-9,  respectively,  on all matters to be voted on by
Fund shareholders. Such rights may change in accordance with changes in policies
of the SEC.  Voting rights of the  participants  in the Canada Life Accounts and
VCA-9 are more fully set forth in the prospectus or disclosure document relating
to that  account,  as
    
                                      P-27
<PAGE>
   
applicable, which should be read together with this Prospectus. The Directors of
the Fund have  authority  to create  additional  portfolios  and to classify and
reclassify  shares of capital stock without further action by  shareholders  and
additional  series may be created in the future.  Under Maryland  corporate law,
the Fund is not required to hold annual  meetings and it is the intention of the
Fund's Directors not to do so. However, special meetings of shareholders will be
held for action by  shareholders  as may be required by the 1940 Act, the Fund's
Articles of Incorporation and By-Laws, or Maryland corporate law.
    

                                    APPENDIX



MOODY'S INVESTORS SERVICE, INC. (MOODY'S)

     DEBT SECURITIES

     Aaa:  Bonds which are rated Aaa are judged to be of the best quality.  They
carry the smallest degree of investment risk. Interest payments are protected by
a large or by an exceptionally  stable margin and principal is secure. While the
various  protective  elements  are  likely to  change,  such  changes  as can be
visualized are most unlikely to impair the fundamentally strong position of such
issues.

     AA:  Bonds  which are  rated Aa are  judged  to be of high  quality  by all
standards. Together with the Aaa group they comprise what are generally known as
high  grade  bonds.  They are rated  lower  than Aaa bonds  because  margins  of
protection may not be as large or  fluctuation of protective  elements may be of
greater  amplitude  or  there  may be  other  elements  present  which  make the
long-term risks appear somewhat larger than in Aaa securities.

     A: Bonds which are rated A possess many favorable investment attributes and
are to be considered as upper medium grade obligations.  Factors giving security
to principal  and interest are  considered  adequate but elements may be present
which suggest a susceptibility to impairment sometime in the future.

     BAA: Bonds 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  characteristically  lacking or may be unreliable over any great
length of time. Such bonds lack outstanding  investment  characteristics  and in
fact may have speculative characteristics as well.

     BA: Bonds 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 thereby not well  safeguarded
during  other  good and bad  times  over the  future.  Uncertainty  of  position
characterizes bonds in this class.

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

     Moody's  applies  numerical  modifiers (1, 2 and 3) in each generic  rating
classification  from Aa  through B in its  corporate  bond  rating  system.  The
modifier 1 indicates  that the  security  ranks in the higher end of its generic
rating  category;  modifier 2  indicates  a mid-range  ranking;  and  modifier 3
indicates that the issuer ranks in the lower end of its generic rating category.


     COMMERCIAL PAPER

     Moody's  Commercial Paper Ratings are opinions of the ability of issuers to
repay  punctually  promissory  senior  debt  obligations  not having an original
maturity in excess of one year.  Issuers rated  "Prime-1" or "P-1" indicates the
highest quality repayment ability of the rated issue.


                                      P-28
<PAGE>

     The  designation  "Prime-2" or "P-2" indicates that the issuer has a strong
ability for  repayment of senior  short-term  promissory  obligations.  Earnings
trends and  coverage  ratios,  while sound,  may be more  subject to  variation.
Capitalization characteristics, while still appropriate, may be more affected by
external conditions. Ample alternative liquidity is maintained.

     The  designation  "Prime-3"  or  "P-3"  indicates  that the  issuer  has an
acceptable  capacity for repayment of  short-term  promissory  obligations.  The
effect  of  industry   characteristics  and  market  compositions  may  be  more
pronounced.  Variability in earnings and  profitability may result in changes in
the  level of debt  protection  measurements  and may  require  relatively  high
financial leverage. Adequate alternate liquidity is maintained.

     Issues  rated  "Not  Prime"  do not fall  within  any of the  Prime  rating
categories.


STANDARD & POOR'S RATING SERVICE ("S&P")

     DEBT SECURITIES

     AAA: Debt issues rated AAA are highest grade  obligations.  Capacity to pay
interest and repay principal is extremely strong.

     AA: Debt issues  rated AA have a very strong  capacity to pay  interest and
repay principal and differ from the highest rated issues only in small degree.

     A: Debt issues  rated A are  regarded as upper  medium  grade.  They have a
strong capacity to pay interest and repay principal although it is somewhat more
susceptible  to the adverse  effects of changes in  circumstances  and  economic
conditions than debt in higher rated categories.

     BBB:  Debt issues rated BBB are regarded as having an adequate  capacity to
pay  interest  and re-pay  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 re-pay principal
for bonds in this category than for bonds in higher rated categories.

     BB, B, CCC,  CC:  Debt  issues  rated  BB,  B, CCC and CC are  regarded  on
balance,  as predominantly  speculative with respect to capacity to pay interest
and pre-pay 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  exposure  to  adverse
conditions.

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

     D: Debt  issues  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.


     COMMERCIAL PAPER

     S&P Commercial  Paper ratings are current  assessments of the likelihood of
timely payment of debts having an original maturity of no more than 365 days.

     A-1:  The A-1  designation  indicates  that the degree of safety  regarding
timely payment is very strong.

     A-2:  Capacity  for  timely  payment  on issues  with this  designation  is
satisfactory. However, the relative degree of safety is
not as high as for issues designated "A-1."

     A-3: Issues  carrying this  designation  have adequate  capacity for timely
payment.  They are, however more vulnerable to the adverse effects of changes in
circumstances than obligations carrying the higher designations.

     B: Issues rated "B" are regarded as having only a speculative  capacity for
timely payment.

     C: This rating is assigned to short-term debt  obligations  with a doubtful
capacity of payment.

     D: Debt rated "D" is in payment default.

     The ratings  assigned by S&P may be modified by the  addition of a plus (+)
or minus (-) sign to show relative standing within its major rating categories.

                                      P-29
<PAGE>




   
                       STATEMENT OF ADDITIONAL INFORMATION
                                   May 1, 1998
                            SELIGMAN PORTFOLIOS, INC.
    

                                 100 Park Avenue
                            New York, New York 10017
          800-221-7844 - all continental United States, except New York
                          212-850-1864 - New York State
                        800-221-2783 - Marketing Services



   
         This Statement of Additional  Information  expands upon and supplements
the information contained in the current Prospectus of Seligman Portfolios, Inc.
(the  "Fund"),  dated May 1,  1998.  It should be read in  conjunction  with the
Prospectus,  which  may be  obtained  by  contacting  the Fund at the  telephone
numbers or address set forth above.  This  Statement of Additional  Information,
although not in itself a  Prospectus,  is  incorporated  by  reference  into the
Prospectus in its entirety.
    







                                TABLE OF CONTENTS

INVESTMENT POLICIES AND RESTRICTIONS......................................     2
DIRECTORS AND OFFICERS....................................................     6
MANAGEMENT AND EXPENSES...................................................    11
PORTFOLIO TRANSACTION, VALUATION AND REDEMPTION...........................    13
CUSTODIAN AND INDEPENDENT AUDITORS........................................    15
FINANCIAL STATEMENTS......................................................    15
APPENDIX A................................................................    16



<PAGE>



                      INVESTMENT POLICIES AND RESTRICTIONS

     The Prospectus  discusses the  investment  objectives of each of the Fund's
Portfolios  and the  policies  it  employs  to  achieve  those  objectives.  The
following  information  regarding the Fund's investment policies supplements the
information contained in the Prospectus.

PURCHASING PUT OPTIONS ON SECURITIES

   
     The Seligman Henderson Global Growth Opportunities  Portfolio, the Seligman
Henderson  Global Smaller  Companies  Portfolio,  the Seligman  Henderson Global
Technology  Portfolio  and  the  Seligman  Henderson   International   Portfolio
(collectively,  the "Seligman Henderson  Portfolios") and the Seligman Large-Cap
Value Portfolio and the Seligman Small-Cap Value Portfolio each may purchase put
options to protect its portfolio  holdings in an underlying  security  against a
decline in market value.  This hedge  protection is provided  during the life of
the put option  since a  Portfolio,  as holder of the put  option,  can sell the
underlying  security at the put exercise price  regardless of any decline in the
underlying  security's market price. In order for a put option to be profitable,
the market price of the underlying security must decline  sufficiently below the
exercise price to cover the premium and transaction  costs. By using put options
in this  manner,  a  Portfolio  will reduce any profit it might  otherwise  have
realized in the  underlying  security by the premium paid for the put option and
by transaction costs.
    

     Because a  purchased  put  option  gives the  purchaser  a right and not an
obligation,  the  purchaser  is not  required  to exercise  the  option.  If the
underlying  position  incurs a gain, a Portfolio would let the put option expire
resulting in a reduced  profit on the  underlying  security equal to the cost of
the put  option.  The cost of the put  option is  limited  to the  premium  plus
commission  paid. A Portfolio's  maximum  financial  exposure will be limited to
these costs.

     A Portfolio  may  purchase  options  listed on public  exchanges as well as
over-the-counter.  Options listed on an exchange are generally  considered  very
liquid.  OTC options are considered  less liquid,  and  therefore,  will only be
considered where there is not a comparable  listed option.  Because options will
be used  solely  for  hedging  and due to their  relatively  low cost and  short
duration, liquidity is not a significant concern.

     A Portfolio's  ability to engage in option  transactions  may be limited by
tax considerations.

LENDING OF PORTFOLIO SECURITIES

     Certain of the Fund's  Portfolios 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 made will generally be short-term and are subject to termination
at the  option  of the  Fund or the  borrower.  The  lending  Portfolio  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.  The lending  Portfolio  does not
have the right to vote  securities  during  the  period  of the loan,  but would
terminate  the  loan  and  regain  the  right  to vote if that  were  considered
important with respect to the investment.

REPURCHASE AGREEMENTS

     Each of the Portfolios 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 a  Portfolio  acquires a money  market
instrument,  generally  a U.S.  Government  obligation,  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 a Portfolio and
is unrelated to the interest rate on the instrument.

     Each  of the  Portfolios  has  the  right  to sell  securities  subject  to
repurchase agreements but would be required to deliver identical securities upon
maturity  of the  repurchase  agreement  unless  the  seller  failed  to pay the
repurchase  price. It is not anticipated  that securities  subject to repurchase
agreements  will be sold  except in the case of  default  on the  obligation  to
repurchase.  To the extent that the proceeds from any sale upon a default in the
obligation to repurchase were less than the repurchase  price, a Portfolio would
suffer a loss.  In  addition,  the law is  unsettled  regarding  the rights of a
Portfolio if the financial institution that is party to the repurchase agreement
petitions  for  bankruptcy  or otherwise  becomes  subject to the United  States
Bankruptcy Code. As a result,  under these extreme  circumstances,  there may be
restrictions  on the  ability  to sell  the  collateral,  and  losses  could  be
incurred.

                                       2
<PAGE>



ILLIQUID SECURITIES

     Other than the Seligman Cash  Management  Portfolio,  each Portfolio of the
Fund may invest up to 15% of its net assets in  illiquid  securities,  including
restricted  securities  (i.e.,  securities  subject  to  restrictions  on resale
because  they have not been  registered  under the  Securities  Act of 1933 (the
"1933 Act")) and other securities that are not readily marketable.

FOREIGN CURRENCY TRANSACTIONS

     A forward foreign currency exchange contract is an agreement to purchase or
sell a  specific  currency  at a future  date and at a price set at the time the
contract  is  entered  into.  Each of the  Seligman  Henderson  Portfolios  will
generally enter into forward foreign currency exchange contracts to fix the U.S.
dollar  value of a security it has agreed to buy or sell for the period  between
the date the trade was entered into and the date the  security is delivered  and
paid for, or, to hedge the U.S. dollar value of securities it owns.

     A Portfolio may enter into a forward  contract to sell or buy the amount of
a foreign currency it believes may experience a substantial movement against the
U.S.  dollar.  In this case the contract would  approximate the value of some or
all of the Portfolio's  securities  denominated in such foreign currency.  Under
normal  circumstances,   the  portfolio  manager  will  limit  forward  currency
contracts to not greater than 75% of a  Portfolio's  position in any one country
as of the date the contract is entered into. This limitation will be measured at
the point the  hedging  transaction  is  entered  into by the  Portfolio.  Under
extraordinary  circumstances,  the  Subadviser  may enter into forward  currency
contracts  in excess of 75% of a  Portfolio's  position in any one country as of
the date the  contract  is entered  into.  The  precise  matching of the forward
contract  amounts and the value of  securities  involved  will not  generally be
possible since the future value of such  securities in foreign  currencies  will
change as a  consequence  of market  movement  in the value of those  securities
between the date the forward  contract is entered  into and the date it matures.
The projection of short-term  currency market  movement is extremely  difficult,
and  the  successful  execution  of a  short-term  hedging  strategy  is  highly
uncertain.  Under  certain  circumstances,  a Portfolio may commit a substantial
portion  or  the  entire  value  of its  assets  to the  consummation  of  these
contracts.  The Subadviser will consider the effect a substantial  commitment of
its  assets to  forward  contracts  would  have on the  investment  program of a
Portfolio and its ability to purchase additional securities.

      Except  as set forth  above  and  immediately  below, each  Portfolio will
also not enter into such  forward  contracts  or maintain a net exposure to such
contracts where the  consummation of the contracts would oblige the Portfolio to
deliver an amount of foreign  currency in excess of the value of the Portfolio's
securities or other assets denominated in that currency.  A Portfolio,  in order
to avoid excess  transactions and transaction costs, may nonetheless  maintain a
net  exposure  to forward  contracts  in excess of the value of the  Portfolio's
securities  or other assets  denominated  in that  currency  provided the excess
amount  is  "covered"  by  cash  and/or  liquid,   high-grade  debt  securities,
denominated  in any currency,  having a value at least equal at all times to the
amount of such excess. Under normal circumstances, consideration of the prospect
for  currency  parties  will be  incorporated  into the longer  term  investment
decisions made with regard to overall diversification  strategies.  However, the
Subadviser  believes that it is important to have the  flexibility to enter into
such  forward  contracts  when it  determines  that  the best  interests  of the
Portfolio will be served.

     At the  maturity of a forward  contract,  a  Portfolio  may either sell the
security  and make  delivery  of the  foreign  currency,  or it may  retain  the
security  and  terminate  its  contractual  obligation  to deliver  the  foreign
currency by purchasing an "offsetting"  contract  obligating it to purchase,  on
the same maturity date, the same amount of the foreign currency.

     As indicated  above,  it is impossible to forecast with absolute  precision
the market  value of  portfolio  securities  at the  expiration  of the  forward
contract.  Accordingly,  it  may  be  necessary  for  a  Portfolio  to  purchase
additional  foreign  currency  on the spot  market (and bear the expense of such
purchase) if the market value of the security is less than the amount of foreign
currency the Portfolio is obligated to deliver and if a decision is made to sell
the security and make delivery of the foreign  currency.  Conversely,  it may be
necessary to sell on the spot market some of the foreign currency  received upon
the sale of the  portfolio  security if its market  value  exceeds the amount of
foreign currency a Portfolio is obligated to deliver.  However,  a Portfolio may
use liquid,  high-grade debt securities,  denominated in any currency,  to cover
the  amount by which the value of a forward  contract  exceeds  the value of the
securities to which it relates.

      If a Portfolio retains the portfolio security and  engages  in  offsetting
transactions,  the Portfolio will incur a gain or a loss (as described below) to
the extent  that there has been  movement  in forward  contract  prices.  If the
Portfolio engages in an offsetting transaction, it may subsequently enter into a
new forward contract to sell the foreign currency. Should forward prices decline
during the period between the Portfolio's  entering into a forward  contract for
the  sale of a  foreign  currency  and the  date it  enters  into an  offsetting
contract for the purchase of the foreign currency,  the Portfolio will realize a
gain to the extent the price of the  currency it has agreed to sell  exceeds the
price of the currency it has agreed to purchase. Should forward prices increase,
the Portfolio  will suffer a loss to the extent the price of the currency it has
agreed to purchase exceeds the price of the currency it has agreed to sell.


                                       3
<PAGE>

     Each  Portfolio's  dealing in forward foreign currency  exchange  contracts
will be limited to the  transactions  described above. Of course, a Portfolio is
not  required  to enter  into  forward  contracts  with  regard  to its  foreign
currency-denominated  securities and will not do so unless deemed appropriate by
the Subadviser. It also should be realized that this method of hedging against a
decline  in the  value of a  currency  does not  eliminate  fluctuations  in the
underlying prices of the securities. It simply establishes a rate of exchange at
a future date.  Additionally,  although such contracts tend to minimize the risk
of loss due to a decline  in the value of a hedged  currency,  at the same time,
they tend to limit any potential gain which might result from an increase in the
value of that currency.

     Shareholders should be aware of the costs of currency conversion.  Although
foreign exchange  dealers do not charge a fee for conversion,  they do realize a
profit based on the difference  (the "spread")  between the prices at which they
are buying and selling  various  currencies.  Thus, a dealer may offer to sell a
foreign  currency to a Portfolio  at one rate,  while  offering a lesser rate of
exchange should the Portfolio desire to resell that currency to the dealer.

PORTFOLIO TURNOVER

   
     The portfolio  turnover rates for each Portfolio are calculated by dividing
the lesser of purchases or sales of portfolio  securities for the fiscal year by
the monthly  average of the value of the portfolio  securities  owned during the
fiscal  year.  Securities  whose  maturity  or  expiration  date at the  time of
acquisition  were one  year or less  are  excluded  from  the  calculation.  The
portfolio turnover rates for the years ended December 31, 1997 and 1996 for each
Portfolio  (except the  Seligman  Cash  Management  Portfolio;  and the Seligman
Large-Cap Value Portfolio and the Seligman  Small-Cap Value Portfolio which each
commenced operations on May 1, 1998*) were as follows: 0

                                                          1997            1996
                                                          ----            ----

Seligman Bond Portfolio                                  170.12%        199.74%
Seligman Capital Portfolio                                93.97          88.78
Seligman Common Stock Portfolio                           80.13          50.33
Seligman Communications and
  Information Portfolio                                  277.14         167.20
Seligman Frontier Portfolio                              101.68         119.74
Seligman Henderson Global Growth
  Opportunities Portfolio                                 77.85          12.99
Seligman Henderson Global
  Smaller Companies Portfolio                             64.81          62.31
Seligman Henderson Global
 Technology Portfolio                                    167.36          45.04
Seligman Henderson
  International Portfolio                                 89.43          48.53
Seligman High-Yield Bond Portfolio                        74.54         117.01
Seligman Income Portfolio                                 96.99          19.59

* The  portfolio  turnover  rate for each of the  Seligman  Large-Cap  Value and
Seligman Small-Cap Value Portfolios is not expected to exceed 100%.
    

INVESTMENT RESTRICTIONS

         The Fund has  adopted the several  investment  restrictions  enumerated
below. Except as otherwise indicated below, restrictions No. 1 through 9 may not
be changed  without  the  affirmative  vote of the  holders  of a majority  of a
Portfolio's outstanding voting securities; restrictions No. 10 through 16 may be
changed by the Fund's Board of Directors without such a vote.
Under these restrictions, none of the Portfolios may:

   
1.   Borrow  money,  except from banks for  temporary  purposes (but not for the
     purpose of purchasing portfolio securities) in an amount not to exceed 10 %
     (15% for the Seligman  Large-Cap  Value  Portfolio  and Seligman  Small-Cap
     Value Portfolio) of the value of the total assets of the Portfolio;  except
     that the Seligman  Capital  Portfolio,  Seligman  Common  Stock  Portfolio,
     Seligman Communications and Information Portfolio, Seligman Large-Cap Value
     Portfolio,  and Seligman  Small-Cap  Value Portfolio may borrow to purchase
     securities  provided that such  borrowings are made only from banks, do not
     exceed one-third of the respective Portfolio's net assets (taken at market)
     and are secured by not more than 10% (15% for the Seligman  Large-Cap Value
     and Seligman  Small-Cap  Value  Portfolios) of such assets (taken at cost);
     except that the Seligman Frontier  Portfolio,  the Seligman High-Yield Bond
     Portfolio,   the  Seligman  Large-Cap  Value  Portfolio  and  the  Seligman
     Small-Cap Value Portfolio will not purchase additional portfolio securities
     if it has outstanding  borrowings in excess of 5% of the value of its total
     assets;  and except  that each of the  Seligman  Henderson  Portfolios  may
     borrow money from banks to purchase  securities in amounts not in excess of
     5% of its total assets.
    



                                       4
<PAGE>

2.   Mortgage,  pledge  or  hypothecate  any of its  assets,  except  to  secure
     borrowings  permitted by paragraph 1 and provided that this limitation does
     not prohibit escrow,  collateral or margin  arrangements in connection with
     (a)  the  purchase  or sale  of  covered  options  (including  stock  index
     options),  (b) the purchase or sale of interest rate or stock index futures
     contracts  or options  on such  contracts  by any of the Fund's  Portfolios
     otherwise permitted to engage in transactions involving such instruments or
     (c) in connection with the Fund's purchase of fidelity insurance and errors
     and omissions insurance,  and provided,  further,  that Seligman High-Yield
     Bond  Portfolio may mortgage,  pledge or  hypothecate  its assets,  but the
     value of such encumbered  assets may not exceed 10% of that Portfolio's net
     asset value. This investment restriction No. 2 may be changed, with respect
     to  the  Seligman  High-Yield  Bond  Portfolio,  by  the  Fund's  Board  of
     Directors.

3.   Make  "short"  sales  of  securities  (except  that  each  of the  Seligman
     Henderson Portfolios may make short sales  "against-the-box"),  or purchase
     securities  on "margin"  except for  short-term  credits  necessary for the
     purchase  or  sale  of  securities,  provided  that  for  purposes  of this
     limitation,  initial and variation  payments or deposits in connection with
     transactions  involving  interest rate or stock index futures contracts and
     options  on  such  contracts  by  any  Portfolio  permitted  to  engage  in
     transactions  involving  such  instruments  will  not be  deemed  to be the
     purchase of securities on margin.

4.   With respect to 75% of its securities  portfolio (or 100% of its securities
     portfolio, in the case of the Seligman High-Yield Bond Portfolio), purchase
     securities  of any  issuer if  immediately  thereafter  more than 5% of its
     total assets  valued at market would be invested in the  securities  of any
     one  issuer,  other  than  securities  issued  or  guaranteed  by the  U.S.
     Government, its agencies or instrumentalities;  or buy more than 10% of the
     voting securities of any one issuer.

5.   Invest more than 25% of the market value of its total assets in  securities
     of issuers in any one industry (except  securities  issued or guaranteed by
     the U.S. Government, its agencies or instrumentalities),  provided that for
     the  purpose  of  this  limitation,   mortgage-related  securities  do  not
     constitute an industry;  provided further that the Seligman  Communications
     and  Information  Portfolio  will  invest  at least 65% of the value of its
     total  assets  in  securities  of  companies  principally  engaged  in  the
     communications,  information and related industries,  except when investing
     for temporary  defensive  purposes;  and provided further that the Seligman
     Cash Management Portfolio may invest more than 25% of its gross assets: (i)
     in the  banking  industry;  (ii)  in the  personal  credit  institution  or
     business credit institution industries;  or (iii) in any combination of (i)
     and (ii).

   
6.   Purchase or hold any real estate,  except that the Seligman Bond Portfolio,
     the  Seligman  Large-Cap  Value  Portfolio,  the Seligman  Small-Cap  Value
     Portfolio,  and each of the  Seligman  Henderson  Portfolios  may engage in
     transactions  involving  securities  secured  by real  estate or  interests
     therein, and the Seligman Large-Cap Value Portfolio, the Seligman Small-Cap
     Value Portfolio, and each of the Seligman Henderson Portfolios may purchase
     securities  issued by  companies or  investment  trusts that invest in real
     estate or interests therein.
    

7.   Purchase or sell commodities and commodity futures  contracts;  except that
     the Board of Directors may authorize any Portfolio  other than the Seligman
     Cash  Management  Portfolio and the Seligman  High-Yield  Bond Portfolio to
     engage in transactions  involving  interest rate and/or stock index futures
     and related options solely for the purposes of reducing investment risk and
     not for speculative purposes.

8.   Underwrite the securities of other issuers,  provided that the  disposition
     of  investments  otherwise  permitted to be made by any Portfolio  (such as
     investments  in  securities  that  are  not  readily   marketable   without
     registration  under the 1933 Act and repurchase  agreements with maturities
     in excess of seven days) will not be deemed to render a  Portfolio  engaged
     in an  underwriting  investment  if not more  than 10% of the value of such
     Portfolio's  total  assets  (taken at cost) would be so invested and except
     that in connection  with the  disposition  of a security a Portfolio may be
     deemed to be an underwriter as defined in the 1933 Act.

9.   Make loans,  except loans of securities,  provided that purchases of notes,
     bonds or other evidences of indebtedness,  including repurchase agreements,
     are not considered loans for purposes of this restriction; provided further
     that each of the Seligman Henderson Global Portfolios may not make loans of
     money or  securities  other than (a) through the purchase of  securities in
     accordance with the Fund's  investment  objective,  (b) through  repurchase
     agreements  and (c) by  lending  portfolio  securities  in an amount not to
     exceed 33 1/3% of the funds total assets.

10.  Purchase  illiquid  securities  for  any  Portfolio  including   repurchase
     agreements  maturing in more than seven days and securities  that cannot be
     sold without  registration or the filing of a notification under Federal or
     state securities laws, if, as a result, such investment would exceed 15% of
     the value of such Portfolio's net assets.

11.  Invest in oil, gas or other mineral  exploration or  development  programs;
     PROVIDED,  HOWEVER,  that this investment  restriction shall not prohibit a
     Portfolio from purchasing  publicly-traded securities of companies engaging
     in whole or in part in such activities.



                                       5
<PAGE>

12.  Purchase securities of any other investment  company,  except in connection
     with a merger,  consolidation,  acquisition or reorganization and except to
     the extent  permitted by Section 12 of the  Investment  Company Act of 1940
     (the "1940 Act").

   
13.  Purchase securities of companies which, together with predecessors,  have a
     record of less than three years'  continuous  operation,  if as a result of
     such purchase,  more than 5% of such  Portfolio's  net assets would then be
     invested in such securities;  except that the Seligman  Communications  and
     Information  Portfolio,  the  Seligman  Frontier  Portfolio,  each  of  the
     Seligman  Henderson  Portfolios and the Seligman  High-Yield Bond Portfolio
     may each  invest  no more than 5% of total  assets,  at  market  value,  in
     securities  of  companies  which,  with  their  predecessors,  have been in
     operation less than three continuous years,  excluding from this limitation
     securities guaranteed by a company that, including  predecessors,  has been
     in operation at least three  continuous  years.  This  restriction does not
     apply to the Seligman  Large-Cap Value Portfolio or the Seligman  Small-Cap
     Value Portfolio.
    

14.      Purchase securities of companies for the purpose of exercising control.

15.  Purchase  securities  from or sell  securities  to any of its  officers  or
     Directors,  except with respect to its own shares and as permissible  under
     applicable  statutes,  rules and  regulations.  In  addition,  the Seligman
     High-Yield  Bond  Portfolio may not purchase or hold the  securities of any
     issuer if, to its knowledge, directors or officers of the Fund individually
     owning  beneficially more than 0.5% of the securities of that issuer own in
     the aggregate more than 5% of such securities.

16.  Invest more than 5% of the value of its net assets,  valued at the lower of
     cost or market, in warrants,  of which no more than 2% of net assets may be
     invested  in  warrants  and rights  not listed on the New York or  American
     Stock Exchange. For this purpose, warrants acquired by the Fund in units or
     attached to securities may be deemed to have been purchased without cost.

     If a percentage  restriction is adhered to at the time of an investment,  a
later  increase or decrease in such  percentage  resulting  from a change in the
value of assets will not constitute a violation of such restriction. In order to
permit  the sale of the  Fund's  shares  in  certain  states,  the Fund may make
commitments more restrictive than the investment  restrictions  described above.
Should  the Fund  determine  that any such  commitment  is no longer in the best
interest of the Fund it will revoke the commitment by  terminating  sales in the
state  involved.  The Fund  also  intends  to  comply  with the  diversification
requirements  under  Section  817(h) of the Internal  Revenue  Code of 1986,  as
amended.  For a description of these  requirements  see the Prospectus of Canada
Life of America  Variable  Annuity  Account 2 and the  Disclosure  Statement  of
Canada  Life of America  Annuity  Account  3, each  established  by Canada  Life
Insurance  Company of America  ("Canada Life") or the Prospectus of the Variable
Contract Account-9 established by MBL Life Assurance Corporation ("MBL Life").

     Under  the  1940  Act,  a "vote of a  majority  of the  outstanding  voting
securities" of the Fund or of a particular  Portfolio means the affirmative vote
of the lesser of (1) more than 50% of the  outstanding  shares of the Fund or of
such Portfolio or (2) 67% or more of the shares of the Fund or of such Portfolio
present at a shareholder's meeting if more than 50% of the outstanding shares of
the Fund or of such  Portfolio  are  represented  at the meeting in person or by
proxy.

                             DIRECTORS AND OFFICERS

     Directors and Officers of the Fund,  together with  information as to their
principal business occupations during the past five years, are shown below. Each
Director 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, New York 10017.

   
WILLIAM C. MORRIS*          Director,  Chairman  of the Board,  Chief  Executive
  (60)                      Officer 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;
                            Trustee, Sarah Lawrence College; and a Member of the
                            Board  of  Governors  of  the   Investment   Company
                            Institute;  formerly,  Director,  Daniel Industries,
                            Inc.,   manufacturer   of  oil  and   gas   metering
                            equipment.
    

                                       6
<PAGE>

BRIAN T. ZINO*              Director, President and Member of the 
  (45)                      Executive Committee

   
                            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 of 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.

RICHARD R. SCHMALTZ*        Director, Member of the Executive Committee and
  (57)                      Portfolio Manager

                            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              Director
  (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; Director, USLIFE Corporation, insurance;
                            Raytheon  Co.,  electronics;  the  National  Defense
                            University;  and the Institute for Defense Analysis;
                            formerly,  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 02155

ALICE S. ILCHMAN            Director
  (63)

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

FRANK A. McPHERSON          Director
  (65)

                            Director,   various   organizations;   Director   or
                            Trustee, the Seligman Group of Investment Companies;
                            Director,   Kimberly-Clark   Corporation,   consumer
                            products, Bank of Oklahoma Holding Company, Oklahoma
                            City Chamber of Commerce,  Baptist  Medical  Center,
                            Oklahoma Chapter of the Nature Conservancy, Oklahoma
                            Medical Research  Foundation,  and National Boys and
                            Girls  Clubs of  America;  Chairman,  Oklahoma  City
                            Public  Schools  Foundation;  and a  Member  of  the
                            Business Roundtable; formerly, Chairman of the Board
                            and Chief Executive Officer, Kerr-McGee Corporation,
                            energy and  chemicals.  123  Robert S. Kerr  Avenue,
                            Oklahoma City, OK 73102

JOHN E. MEROW               Director
  (68)

                            Retired  Chairman  and  Senior  Partner,  Sullivan &
                            Cromwell,   law  firm;  Director  or  Trustee,   the
                            Seligman Group of Investment Companies; Commonwealth
                            Industries,  Inc.;  the Municipal Art Society of New
                            York;    and   the   Unites   States   Council   for
                            International   Business;   Chairman,  the  American
                            Australian  Association;  Chairman, The New York and
                            Presbyterian  Hospital  Care  Network,  Inc.  and  a
                            Director of The New York and  Presbytaria  Hospital;
                            Vice  Chairman  of  the  Unites  States-New  Zealand
                            Council;  and a Member of the American Law Institute
                            and the  Council  on  Foreign  Relations.  125 Broad
                            Street, New York, NY 10004
    

                                       7

<PAGE>



   
BETSY S. MICHEL             Director
  (55)

                            Attorney; Director or Trustee, the Seligman Group of
                            Investment  Companies;  Trustee,  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             Director
  (71)

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

JAMES Q. RIORDAN            Director
  (70)

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

ROBERT L. SHAFER            Director
  (65)

                            Director,   various   organizations;   Director   or
                            Trustee, the Seligman Group of Investment Companies;
                            and Director,  USLIFE  Corporation,  life insurance;
                            formerly,     Vice    President,     Pfizer    Inc.,
                            pharmaceuticals.  235 East 42nd Street, New York, NY
                            10017

JAMES N. WHITSON            Director
  (63)

                            Director,   various   organizations,   Director   or
                            Trustee, the Seligman Group of Investment Companies;
                            Director,  Sammons  Enterprises,  Inc.; Red Man Pipe
                            and Supply Company, piping and other materials;  and
                            C-SPAN;  formerly,  Executive Vice President,  Chief
                            Operating Officer and Director, Sammons Enterprises,
                            Inc. 300 Crescent Court, Suite 700, Dallas, TX 75201

BRIAN ASHFORD- RUSSELL      Vice President and Portfolio Manager
  (39)
    
                            Portfolio Manager, Seligman Henderson Co., advisers;
                            and Henderson  plc,  investment  managers;  and Vice
                            President and Portfolio Manager,  one other open-end
                            investment   company  in  the   Seligman   Group  of
                            investment companies;  formerly,  Portfolio Manager,
                            Touche Remnant & Co., investment managers.

DANIEL J. CHARLESTON        Vice President and Portfolio Manager
  (38)

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

                                       8

<PAGE>
   
IAIN C. CLARK               Vice President and Portfolio Manager
  (47)
    
                            Chief Investment  Officer,  Seligman  Henderson Co.,
                            advisers;  Vice President and Portfolio Manager, one
                            other  open-end  investment  company in the Seligman
                            Group of investment  companies;  Director and Senior
                            Portfolio   Manager,   Henderson   plc,   investment
                            managers; Director,  Henderson International,  Ltd.,
                            investment  managers;  and Secretary,  Treasurer and
                            Vice  President,   Henderson  International,   Inc.,
                            investment adviser.
   
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.

   
NITIN MEHTA                 Vice President and Portfolio Manager
  (37)
    

                            Portfolio Manager, Seligman Henderson Co., advisers;
                            and Henderson  plc,  investment  managers;  and Vice
                            President and Portfolio Manager,  one other open-end
                            investment   company  in  the   Seligman   Group  of
                            investment  companies;  formerly,  Head of  Currency
                            Management   and    Derivatives,    Quorum   Capital
                            Management;    Investment   Officer,   International
                            Finance  Corp.;  and Director of Equities,  Shearson
                            Lehman Global Asset Management.

   
ARSEN MRAKOVCIC             Vice President and Portfolio Manager
  (32)
    

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

   
CHARLES C. SMITH, JR.       Vice President and Portfolio Manager
  (41)
    

                            Managing Director  (formerly,  Senior Vice President
                            and Senior 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   and   Tri-Continental
                            Corporation, closed-end investment company.

   
PAUL H. WICK                Vice President and Portfolio Manager
   (35)
    

                            Managing   Director   (formerly,   Vice   President,
                            Investment   Officer),   J.  &  W.  Seligman  &  Co.
                            Incorporated,  investment managers and advisers; and
                            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.
    

                                       9

<PAGE>
   
FRANK J. NASTA              Secretary
  (33)

                            Senior  Vice  President,   Law  and  Regulation  and
                            Corporate   Secretary,   J.  &  W.  Seligman  &  Co.
                            Incorporated,   investment  managers  and  advisers;
                            Corporate   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, Secretary, J. & W. Seligman Trust Company,
                            trust company; and attorney,  Seward and Kissel, law
                            firm.
    
THOMAS G. ROSE              Treasurer
  (40)
                            Treasurer,   the   Seligman   Group  of   Investment
                            Companies;  and  Seligman  Data  Corp.,  shareholder
                            service   agent;   formerly,   Treasurer,   American
                            Investors Advisors,  Inc. and the American Investors
                            Family of Funds.

         The  Executive  Committee  of the  Board  acts on  behalf  of the Board
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 Board.

   

<TABLE>
<CAPTION>
                                                         Compensation Table
                                                                                   Pension or               Total Compensation
                                                        Aggregate              Retirement Benefits               from Fund
               Name and                             Compensation From          Accrued as part of            and Fund Complex
          POSITION WITH FUND                            Fund (1)                  FUND EXPENSES          PAID TO DIRECTORS (1) (2)
          ------------------                            --------                  -------------          -------------------------
<S>                                                     <C>                            <C>                      <C> 
William C. Morris, Director and Chairman                   N/A                         N/A                          N/A
Brian T. Zino, Director and President                      N/A                         N/A                          N/A
Richard R. Schmaltz, Director*                             N/A                         N/A                          N/A
Ronald T. Schroeder, Director**                            N/A                         N/A                          N/A
Fred E. Brown, Director Emeritus***                        N/A                         N/A                          N/A
John R. Galvin, Director                                $5,131.57                      N/A                      $69,000.00
Alice S. Ilchman, Director                               4,713.08                      N/A                       65,000.00
Frank A. McPherson, Director                             4,748.77                      N/A                       66,000.00
John E. Merow, Director                                  4,713.13                      N/A                       65,000.00
Betsy S. Michael, Director                               5,131.57                      N/A                       69,000.00
James C. Pitney, Director                                4,585.53                      N/A                       64,000.00
James Q. Riordan, Director                               4,876.37                      N/A                       67,000.00
Robert L. Shafer, Director                               4,876.37                      N/A                       67,000.00
James N. Whitson, Director                               5,003.99(d)                   N/A                       68,000.00(d)

</TABLE>
(1) Based on  remuneration  received by the  Directors  of the Fund for the year
ended  December 31, 1997.  Effective  January 16, 1998,  the per meeting fee for
Directors was increased by $1000, which is allocated  proportionately  among all
funds in the Fund Complex.
    

(2) As  defined in the  Fund's  Prospectus,  the  Seligman  Group of  Investment
Companies consists of eighteen investment companies.

   
*    Elected May 15, 1997.
**   Retired May 15, 1997.
***  Retired as Director and designated Director Emeritus on March 20, 1997.
    

(d)  Deferred.

   
         The Fund has a compensation  arrangement  under which outside directors
may elect to defer receiving  their fees.  Under this  arrangement,  interest is
accrued on the deferred  balances.  The annual cost of such fees and interest is
included in the directors' fees and expenses and the accumulated balance thereof
is included  in  "Liabilities"  in the Fund's  financial  statements.  The total
amounts of deferred compensation  (including interest) payable in respect of the
Fund to Mr.  Whitson as of December  31, 1997 was .
    

                                       10


<PAGE>

   
Messrs.  Merow and Pitney no longer defer current  compensation;  however,  they
have accrued deferred  compensation  (including interest) in the amount of and ,
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.
    

   
         Directors  and officers of the Fund are also  trustees,  directors  and
officers of some or all of the other investment companies in the Seligman Group.
As of , 1998, no Directors or officers of the Fund owned  directly or indirectly
shares of any of the Portfolios.
    

                             MANAGEMENT AND EXPENSES

         Under the Management Agreements and subject to the control of the Board
of  Directors,  the  Manager (or in the case of each of the  Seligman  Henderson
Portfolios,  the Manager and Seligman Henderson Co. (the  "Subadviser")  manages
the investment of the assets of the Fund,  including  making purchases and sales
of portfolio  securities  consistent with the Fund's  investment  objectives and
policies,  and administers its business and other affairs.  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 directors  and/or officers of the Fund who are employees
or advisors of the Manager.

         The Management Agreements (and the Subadvisory Agreements,  in the case
of the  Seligman  Henderson  Portfolios)  provide  that  the  Manager  (and  the
Subadviser, in the case of the Seligman Henderson Portfolios) will not be liable
to the Fund for any error of judgment or mistake of law, or for any loss arising
out of any  investment,  or for any act or omission in  performing  their duties
under  the  Management  (and   Subadvisory)   Agreements,   except  for  willful
misfeasance,  bad  faith,  gross  negligence,  or  reckless  disregard  of their
obligations and duties under the Management (and Subadvisory) Agreements.

         The Fund pays all its expenses  other than those assumed by the Manager
or  Subadviser,  including  fees  and  expenses  of  independent  attorneys  and
auditors,   taxes  and  governmental  fees  (including  fees  and  expenses  for
qualifying  the Fund and its shares under  Federal and state  securities  laws),
expenses of printing and  distributing  reports,  notices and proxy materials to
shareholders,  expenses of printing and filing reports and other  documents with
governmental  agencies,  fees and expenses of directors of the Fund not employed
by the Manager or any of its affiliates  (including the  Subadviser),  insurance
premiums and extraordinary expenses such as litigation expenses.

   
         The Seligman Bond Portfolio,  Seligman Capital Portfolio, Seligman Cash
Management  Portfolio,  Seligman  Common Stock  Portfolio  and  Seligman  Income
Portfolio  each pays the Manager a management  fee for its services,  calculated
daily and payable monthly,  equal to an annual rate of .40% of the average daily
net assets of each such Portfolio.  The Seligman  High-Yield Bond Portfolio pays
the Manager a  management  fee for its  services,  calculated  daily and payable
monthly, equal to an annual rate of .50% of the average daily net assets of such
Portfolio.  The Seligman  Communications and Information  Portfolio and Seligman
Frontier  Portfolio  each pay the  Manager a  management  fee for its  services,
calculated  daily and  payable  monthly,  equal to an annual rate of .75% of the
average daily net assets of each such  Portfolio.  The Seligman  Large-Cap Value
Portfolio  pays the Manger a management fee for its services,  calculated  daily
and payable monthly,  equal to an annual rate of .80% of the Portfolio's average
daily  net  assets  on the  first  $500  million  of  net  assets,  .70%  of the
Portfolio's  average daily net assets on the next $500 million of net assets and
 .60% of the  Portfolio'  average  daily net assets in excess of $1 billion.  The
Seligman  Small-Cap  Value  Portfolio  pays the Manager a management fee for its
services, calculated daily and payable monthly, equal to an annual rate of 1.00%
of the  Portfolio's  average  daily net assets on the first $500  million of net
assets,  .90% of the  Portfolio's  average  daily  net  assets  on the next $500
million of net assets,  and .80% of the Portfolio's  average daily net assets in
excess of $1 billion. Each of the Seligman Henderson Portfolios pays the Manager
a management fee for its services,  calculated daily and payable monthly,  equal
to an  annual  rate of  1.00% of the  average  daily  net  assets  of each  such
Portfolio,  of which .90% is paid to the Subadviser  for the services  described
below.
    


                                       11

<PAGE>



       The following table indicates the management fees paid (or waived, in the
case of Seligman Cash Management Portfolio) for the years 1997, 1996, and 1995:
   
<TABLE>
<CAPTION>
                                                                 1997      1996          1995
                                                                 ----      ----          ----
<S>                                                          <C>         <C>           <C>

Seligman Bond Portfolio                                      $           $ 18,034      $ 15,262
Seligman Capital Portfolio                                                 48,339        28,551
Seligman Cash Management Portfolio*                                        36,532        18,365
Seligman Common Stock Portfolio                                           134,264        94,380
Seligman Communications and Information Portfolio                         373,337       123,216
Seligman Frontier Portfolio                                               165,050        29,219
Seligman Henderson Global Growth Opportunities Portfolio                    4,098**        --
Seligman Henderson Global Smaller Companies Portfolio                     110,169        17,210
Seligman Henderson Global Technology Portfolio                              4,920**        --
Seligman Henderson International Portfolio                                 57,323        25,312
Seligman High-Yield Bond Portfolio                                         35,858         3,941**
Seligman Income Portfolio                                                  49,574        45,797
</TABLE>
    
- ------------------------
*   The Manager, at its discretion, waived all of its fees.
**  Fees paid from commencement of operations.

         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 Appendix A for further information about the Manager.

   
         The Management  Agreement with respect to the Seligman Bond  Portfolio,
Seligman Capital Portfolio,  Seligman Cash Management Portfolio, Seligman Common
Stock  Portfolio  and  Seligman  Income  Portfolio  was approved by the Board of
Directors on September 30, 1988 and by shareholders at a Special Meeting held on
December  16,  1988.  The  Management  Agreement  with  respect to the  Seligman
Henderson  International  Portfolio  was  approved by the Board of  Directors on
March  18,  1993.  The  Management  Agreements  with  respect  to  the  Seligman
Communications and Information Portfolio,  the Seligman Frontier Portfolio,  and
the Seligman  Henderson Global Smaller Companies  Portfolio were approved by the
Board of Directors on July 21, 1994.  The  Management  Agreement with respect to
the Seligman High-Yield Bond Portfolio was approved by the Board of Directors on
March 16, 1995. The Management  Agreement with respect to the Seligman Henderson
Global  Growth  Opportunities   Portfolio  and  the  Seligman  Henderson  Global
Technology  Portfolio  was approved by the Board of Directors on March 21, 1996.
The Management  Agreement with respect to the Seligman Large-Cap Value Portfolio
and the  Seligman  Small-Cap  Value  Portfolio  was  approved  by the  Board  of
Directors on March 19, 1998. The Management  Agreements  will continue in effect
until  December  31 of each year,  with  respect to each  Portfolio  (except the
Seligman  Large-Cap Value Portfolio and the Seligman  Small-Cap  Portfolio,  for
which the  Management  Agreement is in effect until  December 31, 1999, and then
each December 31 thereafter)  if (1) such  continuance is approved in the manner
required by the 1940 Act (by a vote of a majority of the Board of  Directors  or
of the  outstanding  voting  securities  of the  Portfolios  and by a vote  of a
majority of the  Directors who are not parties to the  Management  Agreements or
interested  persons  of any  such  party)  and (2) the  Manager  shall  not have
notified the Fund at least 60 days prior to the anniversary date of the previous
continuance that it does not desire such continuance.  The Management Agreements
may be  terminated  at any time with  respect to any or all  Portfolios,  by the
Fund,  without penalty,  on 60 days' written notice to the Manager.  The Manager
may terminate the Management  Agreements at any time upon 60 days written notice
to the Fund. The Management Agreements will terminate automatically in the event
of their assignment.  The Fund has agreed to change its name upon termination of
the Management  Agreements if continued use of the name would cause confusion in
the context of the Manager's business.

         Under  the   Subadvisory   Agreements   between  the  Manager  and  the
Subadviser,  the Subadviser  supervises and directs the investment of the assets
of each of the Seligman  Henderson  Portfolios,  including  making purchases and
sales of portfolio  securities  consistent  with each of the Seligman  Henderson
Portfolio's   investment  objectives  and  policies.   For  these  services  the
Subadviser is paid a fee equal to an annual rate of .90% of each of the Seligman
Henderson  Portfolio's average daily net assets. The Subadvisory  Agreement with
respect to Seligman Henderson  International Portfolio was approved by the Board
of Directors at a meeting held on March 18, 1993. The Subadvisory Agreement with
respect to Seligman Henderson Global Smaller Companies Portfolio was approved by
the Board of  Directors  at a meeting  held on July 21,  1994.  The  Subadvisory
Agreements  with  respect to  Seligman  Henderson  Global  Growth  Opportunities
Portfolio and Seligman  Henderson Global  Technology  Portfolio were approved by
the Board of  Directors at a meeting  held on March 21,  1996.  The  Subadvisory
Agreements will continue in effect until December 31 of each year, and from year
to year thereafter
    

                                       12

 <PAGE>

if (1) such continuance is approved in the manner required by the 1940 Act (by a
vote of a  majority  of the  Board of  Directors  or of the  outstanding  voting
securities  of the  Portfolios  and by a vote of a majority of the Directors who
are not parties to the Subadvisory  Agreements or interested persons of any such
party) and (2) the Subadviser  shall not have notified the Manager in writing at
least 60 days  prior to such  December  31 or prior to  December  31 of any year
thereafter that it does not desire such continuance.  The Subadvisory Agreements
may be  terminated  at any time by the Fund,  on 60 days  written  notice to the
Subadviser. The Subadvisory Agreements will terminate automatically in the event
of  their  assignment  or  upon  the  termination  of  the  relevant  Management
Agreement.

   
         The Subadviser is a New York general  partnership formed by the Manager
and  Henderson  International,  Inc., a controlled  affiliate of Henderson  plc.
Henderson plc,  headquartered in London, is one of the largest independent money
managers in Europe and is recognized as a specialist in global equity investing.
    

         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  Director  of  Compliance,  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  Director of  Compliance,  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.  In turn,  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.

                PORTFOLIO TRANSACTIONS, VALUATION AND REDEMPTION

         As provided in the Management  Agreements,  the Manager (or in the case
of each of the Seligman  Henderson  Portfolios,  the Manager or the  Subadviser)
purchases and sells securities for the Fund. Purchase and sale orders are placed
by the Manager or the Subadviser.

         The Management Agreements and the Subadvisory Agreements recognize that
in the purchase and sale of portfolio  securities  the Manager or the Subadviser
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 brokers or dealers to the  manager  for its use, as well as to the
general attitude toward and support of investment companies demonstrated by such
brokers or dealers.  Such services  include  supplemental  investment  research,
analysis and reports concerning issuers, industries and securities deemed by the
Manager or Subadviser to be beneficial to the Fund. In addition,  the Manager or
the   Subadviser  is  authorized  to  place  orders  with  brokers  who  provide
supplemental  investment  and  market  research  and  statistical  and  economic
analysis  although  the use of such  brokers  may  result in a higher  brokerage
charge  to the Fund  that the use of  brokers  selected  solely  on the basis of
seeking the most  favorable  price and  execution and although such research and
analysis may be useful to the Manager or the  Subadviser in connection  with its
services to clients other than the Fund.

         In over-the-counter  markets, the Fund deals with primary market makers
unless a more  favorable  execution or price is believed to be  obtainable.  The
Fund may buy securities  from or sell securities to dealers acting as principal,
except dealers with which its directors and/or officers are affiliated.

                                       13

<PAGE>



         Brokerage  commissions  of each  Portfolio  (except the  Seligman  Bond
Portfolio,  Seligman  Cash  Management  Portfolio and Seligman  High-Yield  Bond
Portfolio;  and the Seligman  Large-Cap Value  Portfolio and Seligman  Small-Cap
Value Portfolio,  which both commenced  operations on May 1, 1998) for the years
1997, and if applicable, 1996 and 1995, are set forth in the following table:
   
<TABLE>
<CAPTION>
                                                                            Total Brokerage
                                                                         Commissions Paid for
                                                               Execution And Statistical Services (1)
                                                               --------------------------------------
                                                                1997      1996           1995
                                                                ----      ----           ----
<S>                                                           <C>      <C>             <C>
Seligman Capital Portfolio                                    $        $ 19,283        $20,041
Seligman Common Stock Portfolio                                          37,709         34,600
Seligman Communications and Information Portfolio                        82,832         32,247
Seligman Frontier Portfolio                                              43,065         12,086
Seligman Henderson Global Growth Opportunities Portfolio                  4,056            N/A
Seligman Henderson Global Smaller Companies Portfolio                    39,649         12,794
Seligman Henderson Global Technology Portfolio                            2,037            N/A
Seligman Henderson International Portfolio                               20,495         12,389
Seligman Income Portfolio                                                 1,483          6,746
</TABLE>
    
- --------------
  (1)  Not including any spreads on principal transactions on a net basis.

         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 salable.

   
         VALUATION.  The  net  asset  value  per  share  of  each  Portfolio  is
determined  as of the close of regular  trading  on the New York Stock  Exchange
(normally,  4:00 p.m. Eastern time) each day that the New York Stock Exchange is
open. Currently, the New York Stock Exchange is 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 following  supplements
information contained in the Prospectus regarding the manner in which securities
are valued.
    

         It is the policy of the Seligman Cash  Management  Portfolio to use its
best efforts to maintain a constant per share price equal to $1.00.  Instruments
held by the  Seligman  Cash  Management  Portfolio  are  valued  on the basis of
amortized cost.  This involves  valuing an instrument at its cost initially and,
thereafter,  assuming a constant  amortization  to maturity  of any  discount or
premium,  regardless of the impact of  fluctuating  interest rates on the market
value of the instrument.  While this method provides certainty in valuation,  it
may result in periods during which the value,  as determined by amortized  cost,
is higher or lower  than the price the  Portfolio  would  receive if it sold the
instrument.

         The foregoing  method of valuation is permitted by Rule 2a-7 adopted by
the  Securities  and  Exchange  Commission  (the  "SEC").  Under this rule,  the
Seligman Cash Management  Portfolio must maintain an average-weighted  portfolio
maturity  of 90  days  or  less,  purchase  only  instruments  having  remaining
maturities of one year or less, and invest only in securities  determined by the
Fund's  Directors to be of high quality with minimal credit risks. In accordance
with the rule, the Directors have established  procedures designed to stabilize,
to the extent  reasonably  practicable,  the price per share as computed for the
purpose of sales and  redemptions of the Seligman Cash  Management  Portfolio at
$1.00. Such procedures  include review of the portfolio holdings by the Seligman
Cash Management Portfolio and determination as to whether the net asset value of
the Seligman Cash Management  Portfolio,  calculated by using  available  market
quotations  or market  equivalents,  deviates  from  $1.00  per  share  based on
amortized cost. The rule also provides that the extent of any deviation  between
the  net  asset  value  based  upon  available   market   quotations  or  market
equivalents,  and $1.00 per share net asset value, based on amortized cost, must
be examined by the Directors.  In the event that a deviation of .5 of 1% or more
exists between the Portfolio's $1.00 per share net asset value and the net asset
value calculated by reference to market gestations, or if there is any deviation
which the Board of Directors  believes  would  result in a material  dilution to
shareholders or purchasers,  the Board of Directors will promptly  consider what
action,  if any,  should be  initiated.  Any such  action may  include:  selling
portfolio instruments prior to maturity to realize capital gains or losses or to
shorten   average   portfolio   maturity;   withholding   dividends   or  paying
distributions  from  capital  or capital  gains;  redeeming  shares in kind;  or
establishing a net asset value per share by using available market quotations.

         With respect to each of the Seligman  Henderson  Portfolios,  portfolio
securities, including open short positions, are valued at the last sale price on
the securities exchange or securities market on which such securities  primarily
are traded.  Securities traded on a foreign 

                                       14

<PAGE>

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 not recent  sales  transactions  are valued
based on quotations  provided by primary market makers in such  securities.  Any
securities  for  which  recent  market  quotations  are not  readily  available,
including  restricted  securities,  are  valued  at  fair  value  determined  in
accordance  with  procedures  approved  by the  Board of  Directors.  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 of Directors  determines  that this amortized cost
value does not represent fair market value.

         Generally,  trading in foreign  securities,  as well as U.S. Government
securities, money market instruments and repurchase agreements, is substantially
completed  each day at  various  times  prior to the close of the New York Stock
Exchange. The values of such securities used in computing the net asset value of
the shares of the Portfolio are  determined as of such times.  Foreign  currency
exchange rates are also generally  determined prior to the close of the New York
Stock Exchange. Occasionally,  events affecting the value of such securities and
such exchange rates may occur between the times at which they are determined and
the close of the New York Stock  Exchange,  which will not be  reflected  in the
computation  of net asset  value.  If during  such  periods  events  occur which
materially affect the value of such securities, the securities will be valued at
their fair market value as determined in accordance with procedures  approved by
the Board of Directors.

         For  purposes  of  determining  the net  asset  value  per share of the
Portfolio all assets and liabilities  initially  expressed in foreign currencies
will be converted into U.S. dollars at the mean between the bid and offer prices
of such currencies against U.S. dollars quoted by a major bank that is a regular
participant in the foreign  exchange market or on the basis of a pricing service
that takes into account the quotes provided by a number of such major banks.

   
         REDEMPTION. The procedures for redemption of Fund shares under ordinary
circumstances are set forth in the Prospectus. In unusual circumstances, payment
may  be  postponed,  if the  orderly  liquidation  of  portfolio  securities  is
prevented  by the  closing  of,  or  restricted  trading  on the New York  Stock
Exchange  during  periods of emergency,  or such other periods as ordered by the
SEC. It is not  anticipated  that shares will be redeemed for other than cash or
its equivalent. However, the Fund reserves the right to pay the redemption price
to the Canada Life Accounts and VCA-9 in whole or in part, by a distribution  in
kind  from  the  Fund's  investment  portfolio,  in lieu  of  cash,  taking  the
securities at their value employed for determining  such redemption  price,  and
selecting the  securities in such manner as the Board of Directors may deem fair
and  equitable.  If shares  are  redeemed  in this  way,  brokerage  costs  will
ordinarily be incurred by the Canada Life Accounts and VCA-9 in converting  such
securities into cash.
    

                       CUSTODIANS AND INDEPENDENT AUDITORS

   
         CUSTODIANS.  With  the  exception  of  each of the  Seligman  Henderson
Portfolios,  Investors  Fiduciary  Trust Company,  127 West 10th Street,  Kansas
City,  Missouri  64105,  serves as custodian for the Fund,  and in such capacity
holds in a separate  account  assets  received  by it from or for the account of
each of the Fund's Portfolios.
    

         Morgan Stanley Trust Company, One Pierrepont Plaza,  Brooklyn, New York
11201, serves as custodian for each of the Seligman Henderson Portfolios, and in
such capacity holds in a separate  account assets received by it from or for the
account of each of these Portfolios of the Fund.

   
        INDEPENDENT  AUDITORS., independent  auditors,  serve as auditors of the
Fund and certify the annual  financial  statements of the Fund. Their address is
787 Seventh Avenue, New York, New York 10019.
    

                              FINANCIAL STATEMENTS

   
         Audited financial  statements and notes thereon as of December 31, 1997
for the Fund's  Portfolios  are  incorporated  herein by reference to the Fund's
1997 Annual  Report.  The Annual Report will be furnished,  without  charge,  to
investors who request copies of the Fund's Statement of Additional Information.
    

                                       15

<PAGE>

                                   APPENDIX A

                 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 underwriting.
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.

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

 ...1920s

o    Participates in  hundreds  of  successful 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, 0with over $2 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.

                                       16

<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 .
o    Establishes J. & W. Seligman Trust Company, and J. & W. Seligman Valuations
     Corporation.
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.









                                       17


<PAGE>


   
                         POST-EFFECTIVE AMENDMENT NO. 21
                              CROSS REFERENCE SHEET
                             Pursuant to Rule 481(a)
    
<TABLE>
<CAPTION>
Item No. In Part A Of Form N-1a            Location In Prospectus
- -------------------------------            ----------------------
<S>  <C>                                   <C>
1.   Cover Page                            Cover Page

2.   Synopsis                              Not applicable

3.   Condensed Financial Information       Financial Highlights

4.   General Description of                Investment Objectives and
     Registrant                            Policies

5.   Management of Fund                    Management Services; Portfolio
                                           and Valuation Transactions,
                                           Portfolio Turnover

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

6.   Capital Stock and Other Securities    Organization and Capitalization; 
                                           Other Investment Policies;
                                           Dividends, Distributions and Taxes

7.   Purchase of Securities Being          Purchases and Redemptions
     Offered     

   
8.   Redemption or Repurchase              Purchases and Redemptions
    

9.   Pending Legal Proceedings             Not applicable

Item No. 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       Appendix A

13.  Investment Objectives and Policies    Investment Policies and Restrictions

14.  Management of the Registrant          Management and Expenses

15.  Control Persons and Principal         Directors and Officers
     Holders of Services

16.  Investment Advisory and Other         Management and Expenses;
     Services                              Custodians and Independent Auditors

17.  Brokerage Allocation                  Portfolio Transactions, Valuation
                                           and Redemption

18.  Capital Stock and Other Securities    Portfolio Transactions, Valuation
                                           and Redemption

19.  Purchase, Redemption and Pricing      Portfolio Transactions, Valuation 
     of Securities Being Offered           and Redemption

20.  Tax Status                            Dividends, Distributions and Taxes
                                           (Prospectus)

21.  Underwriters                          Not applicable

22.  Calculation of Performance Data       Portfolio Transactions, Valuation
                                           and Redemption

23.  Financial Statements                  Financial Statements
</TABLE>

<PAGE>

PART C.  OTHER INFORMATION
- -------  -----------------

Item 24. Financial Statements And Exhibits
- -------- ---------------------------------

   (a)  Financial Statements:

   Part A:  Financial   Highlights   from    June  21,  1988  (commencement   of
            operations)  to  December  31,  1996 for  Seligman  Bond  Portfolio,
            Seligman  Capital  Portfolio,  Seligman Cash  Management  Portfolio,
            Seligman Common Stock Portfolio, and Seligman Income Portfolio; from
            May 3, 1993  (commencement  of  operations) to December 31, 1996 for
            the Seligman  Henderson  International  Portfolio;  from October 11,
            1994  (commencement of operations) to December 31, 1996 for Seligman
            Communications   and  Information   Portfolio,   Seligman   Frontier
            Portfolio and Seligman Henderson Global Smaller Companies Portfolio;
            from May 1, 1995  (commencement  of operations) to December 31, 1996
            for  Seligman  High-Yield  Bond  Portfolio;  and  from  May 1,  1996
            (commencement  of  operations)  to December  31,  1996 for  Seligman
            Henderson  Global  Growth   Opportunities   Portfolio  and  Seligman
            Henderson Global Technology Portfolio.

   
   Part B:  Financial  Statements  will  be  included in the Fund's audited 1997
            Annual Report,  and will be  incorporated by reference in the Fund's
            Statement of Additional Information. These Financial Statements are:
            Portfolios  of  Investments  as of December 31, 1997;  Statements of
            Assets and  Liabilities  as of  December  31,  1997;  Statements  of
            Operations  for the  yearended  December  31,  1997;  Statements  of
            Changes in Net Assets for the years ended December 31, 1997 and 1996
            for Seligman Bond Portfolio,  Seligman Capital  Portfolio,  Seligman
            Cash Management Portfolio, Seligman Common Stock Portfolio, Seligman
            Communications   and  Information   Portfolio,   Seligman   Frontier
            Portfolio,  Seligman  Henderson Global Smaller Companies  Portfolio,
            Seligman Henderson International Portfolio, Seligman Higi-Yield Bond
            Portfolio,  and Seligman  Income  Portfolio;  and for the year ended
            December  31,  1997 and the  period  May 1,  1996  (commencement  of
            operations) to December 31, 1996 for the Seligman  Henderson  Global
            Growth   Opportunities   Portfolio  and  Seligman  Henderson  Global
            Technology  Portfolio;  Notes  to  Financial  Statements;  Financial
            Highlights  for the five years ended  December 31, 1997 for Seligman
            Bond Portfolio, Seligman Capital Portfolio, Seligman Cash Management
            Portfolio,  Seligman  Common Stock  Portfolio,  and Seligman  Income
            Portfolio;  for the period May 3, 1993  (commencement of operations)
            to December 31, 1997 for Seligman Henderson International Portfolio;
            for the period  October 11, 1994  (commencement  of  operations)  to
            December  31,  1997  for  Seligman  Communications  and  Information
            Portfolio, Seligman Frontier Portfolio and Seligman Henderson Global
            Smaller   Companies   Portfolio;   for  the   period   May  1,  1995
            (commencement  of  operations)  to December  31,  1997 for  Seligman
            High-Yield  Bond   Portfolio;   and  for  the  period  May  1,  1996
            (commencement  of  operations)  to December  31,  1997 for  Seligman
            Henderson  Global  Growth   Opportunities   Portfolio  and  Seligman
            Henderson  Global  Technology   Portfolio;   Report  of  Independent
            Auditors. These financial statements will be filed by amendment.
    

   
   (b) Exhibits: All Exhibits have been previously filed, except Exhibits marked
                 with an  asterisk  (*) which will be filed by amendment.
    

   (1) Form   of   Articles  of  Amendment  and   Restatement  of   Articles  of
       Incorporation. (Incorporated by reference to Post-Effective Amendment No.
       19 filed on November 1, 1996.)

   
   (2) By-laws of Registrant.  (Incorporated  by  reference  to   Post-Effective
       Amendment No. 20 filed on April 17, 1997.)
    

   (3) Not applicable.

   (4) Not applicable.

<PAGE>


PART C.   OTHER INFORMATION (CONT'D)
- ------    -------------------------
  (5)  (a)  Form of Management Agreement in respect of Seligman Henderson
            Global  Growth  Opportunities  Portfolio  and Seligman  Henderson
            Global  Technology  Portfolio.   (Incorporated  by  reference  to
            Post-Effective No. 17 filed on February 15, 1996.)
       (b)  Form of Subadvisory Agreement in respect of Seligman Henderson
            Global Growth Opportunities Portfolio and Seligman Henderson Global
            Technology Portfolio. (Incorporated by reference to Post-Effective
            No. 17 filed on February 15, 1996.)
       (c)  Form of Management Agreement in respect of Seligman High-Yield Bond
            Portfolio. (Incorporated by reference to Post-Effective Amendment
            No. 14 filed on February 14, 1995.)
       (d)  Management Agreement in respect of Seligman Communications and
            Information and Seligman Frontier Portfolios. (Incorporated by
            reference to Post-Effective Amendment No. 15 filed on March 31,
            1995.) (e) Management Agreement in respect of Seligman Henderson
            Global Smaller Companies Portfolio (formerly, Seligman Henderson
            Global Emerging Companies Portfolio). (Incorporated by reference to
            Post-Effective Amendment No. 15 filed on March 31, 1995.) (f)
            Subadvisory Agreement in respect of Seligman Henderson Global
            Smaller Companies Portfolio. (Incorporated by reference to
            Post-Effective Amendment No. 15 filed on March 31, 1995.) (g)
            Management Agreement in respect of Seligman Henderson Global
            Portfolio. (Incorporated by reference to Post-Effective Amendment
            No. 15 filed on March 31, 1995.) (h) Subadvisory Agreement in
            respect of Seligman Henderson Global Portfolio. (Incorporated by
            reference to Post-Effective Amendment No. 15 filed on March 31,
            1995.) (i) Management Agreement in respect of Seligman Capital,
            Seligman Cash Management, Seligman Common Stock, Seligman Fixed
            Income Securities, and Seligman Income Portfolios. (Incorporated by
            reference to Post-Effective Amendment No. 15 filed on March 31,
            1995.)
   
      (j)  Management Agreement in respect of Seligman Large-Cap Value
            Portfolio and Seligman Small-Cap Value Portfolio.*
    

  (6)       Not applicable.

  (7)       Not applicable.
   
  (8)  (a)   Custodian Agreement and Sub-Custodian Agreement in respect of
             Seligman Capital, Seligman Cash Management, Seligman Common Stock,
             Seligman Fixed Income Securities, and Seligman Income Portfolios.*
        (b)  Form of First Amendment to Custodian Agreement in respect of
             Seligman Communications and Information and Seligman Frontier
             Portfolios.*
        (c)  Recordkeeping Agreement in respect of Seligman Henderson Global
             Portfolio.*
        (d)  First Amendment to Recordkeeping Agreement in respect of Seligman
             Henderson Global Smaller Companies Portfolio.*
    
        (e)  Second Amendment to Custodian Agreement in respect of Seligman
             High-Yield Bond Portfolio. (Incorporated by reference to
             Post-Effective Amendment No. 18 filed on May 2, 1996.)
        (f)  Second Amendment to Recordkeeping Agreement in respect of Seligman
             Henderson Global Growth Opportunities Portfolio and Seligman
             Henderson Global Technology Portfolio. (Incorporated by reference
             to Post-Effective Amendment No. 18, filed May 2, 1996.)
        (g)  Custodian Agreement between Registrant and Morgan Stanley Trust
             Company in respect of the Seligman Henderson Portfolios.
             (Incorporated by reference to Post-Effective Amendment No. 19 filed
             on November 1, 1996.)


 <PAGE>


PART C.  OTHER INFORMATION (CONT'D)
- -------  --------------------------

   (9) Other Material Contracts.
   
        (a)  Waiver of Buy/Sell Agreement between the Registrant and The Mutual
             Benefit Life Insurance Company.*
        (b)  Buy/Sell  Agreement  between  Registrant  and Canada Life Insurance
             Company of America.* 
        (c)  Buy/Sell Agreement between Registrant and Canada Life Insurance
             Company of America.*
        (d)  Agency Agreement between Investors Fiduciary Trust Company, acting
             as Transfer and Dividend Disbursing Agent, and the Fund in respect
             of Seligman Capital, Seligman Cash Management, Seligman Common
             Stock, Seligman Fixed Income Securities, and Seligman Income
             Portfolios.*
        (e)  First Amendment to Agency Agreement between Investors Fiduciary
             Trust Company, acting as Transfer and Dividend Disbursing Agent,
             and the Fund in respect of Seligman Henderson Global Portfolio.*
        (f)  Second Amendment to Agency Agreement between Investors Fiduciary
             Trust Company, acting as Transfer and Dividend Disbursing Agent,
             and the Fund in respect of Seligman Communications and Information,
             Seligman Frontier, and Seligman Henderson Global Smaller Companies
             Portfolios.*
    
        (g)  Third Amendment to Agency Agreement between Investors Fiduciary
             Trust Company, acting as Transfer and Dividend Disbursing Agent,
             and the Fund in respect of Seligman High-Yield Bond Portfolio.
             (Incorporated by reference to Post-Effective Amendment No. 18,
             filed May 2, 1996.)
        (h)  Fourth Amendment to Agency Agreement between Investors Fiduciary
             Trust Company, acting as Transfer and Dividend Disbursing Agent,
             and the Fund in respect of Seligman Henderson Global Growth
             Opportunities Portfolio and Seligman Henderson Global Technology
             Portfolio. (Incorporated by reference to Post-Effective Amendment
             No. 18, filed May 2, 1996.)

   (10)  Opinion and Consent of Counsel.
         (Incorporated by reference to Post-Effective Amendment No. 18, filed
         May 2, 1996.)

   (11)  Consent of independent auditors.*

   (12)  N/A
   
   (13) (a)  Representation Re: Initial Capital (Purchase Agreement for Seligman
             Capital, Seligman Cash Management, Seligman Common Stock, Seligman
             Fixed Income Securities, and Seligman Income Portfolios).*
        (b)  Representation Re: Initial Capital (Purchase Agreement for Seligman
             Henderson Global Portfolio).*
    
        (c)  Representation Re: Initial Capital (Purchase Agreement for Seligman
             High-Yield Bond Portfolio). (Incorporated by reference to
             Post-Effective Amendment No. 15 filed on March 31, 1995.)
        (d)  Representation Re: Initial Capital (Purchase Agreement for Seligman
             Henderson Global Growth Opportunities Portfolio and Seligman
             Henderson Global Technology Portfolio). (Incorporated by reference
             to Post-Effective Amendment No. 18, filed May 2, 1996.)
<PAGE>

PART C.  OTHER INFORMATION (CONT'D)
- ------   --------------------------

   
   (14)  The Seligman 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.)

  (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.)

   (15)  Not applicable.

   (16)  Not applicable.

   (17)  Financial Data Schedules meeting the requirements of Rule 483 under the
         Securities Act of 1933.*

   (18)  Not applicable.

   Other  Exhibits:  Powers of Attorney  (Incorporated  by reference to 
                     Post-Effective  Amendment  No. 20 filed on April 17, 1996.)
    

Item 25.   Persons Controlled By Or Under Common Control With Registrant
- --------   -------------------------------------------------------------

           None.

Item 26.   Number Of Holders Of Securities
- --------   -------------------------------
   
           As of February 12, 1998,  there were eight record  holders of Capital
Stock of the Registrant.
    

Item 27.   Indemnification
- --------   ---------------

             Reference  is  made  to  the  provisions  of  Article  Eleventh  of
             Registrant's  Amended and Restated Articles of Incorporation  filed
             as  Exhibit  24(b)(1)  of  Post-Effective  Amendment  No. 19 to the
             Registration  Statement,  filed  November 6, 1996 and Article IV of
             Registrant's Amended and Restated By-laws filed as Exhibit 24(b)(2)
             to this Post-Effective Amendment No.
             20 to the Registration Statement.

             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.

<PAGE>
PART C.    OTHER INFORMATION (cont'd)
- -------    --------------------------

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 High Income Fund Series, 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 Quality Municipal Fund,
           Inc.,  Seligman  Select  Municipal  Fund,  Inc.,  Seligman Value Fund
           Series, Inc., and Tri-Continental Corporation.

           The  Subadviser  also serves as subadviser  to nine other  associated
           investment companies.  They are Seligman Capital 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  Value  Fund  Series,   Inc.,  and   Tri-Continental
           Corporation.

           The Manager and Subadviser each have 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  and  the  Subadviser,  respectively,  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  and  the
           Subadviser,  respectively, pursuant to the Investment Advisers Act of
           1940 (SEC File Nos.  801-15798 and  801-40670,  respectively),  which
           were filed on June 3, 1997.

Item 29.   Not applicable.
- --------

Item 30.   Location of  Accounts  and  Records - All accounts,  books and  other
- --------   documents  required to be maintained by Section 31(a) of the 1940 Act
           and the Rules (17 CFR 270.31a-1 to 31a-3) promulgated thereunder will
           be maintained by the following:

           Custodian for Seligman Bond Portfolio,  Seligman  Capital  Portfolio,
           Seligman Cash Management Portfolio,  Seligman Common Stock Portfolio,
           Seligman Communications and Information Portfolio,  Seligman Frontier
           Portfolio,  Seligman  High-Yield Bond Portfolio,  and Seligman Income
           Portfolio  and  Recordkeeping  agent  for all  Portfolios:  Investors
           Fiduciary Trust Company, 127 West 10th Street,  Kansas City, Missouri
           64105.

           Custodian  for  Seligman   Henderson   Global  Growth   Opportunities
           Portfolio,  Seligman  Henderson Global Smaller  Companies  Portfolio,
           Seligman   Henderson  Global  Technology   Portfolio,   and  Seligman
           Henderson International Portfolio:  Morgan Stanley Trust Company, One
           Pierrepont Plaza, Brooklyn, New York 11201.

           Transfer,  Redemption and Other Shareholder  Account Services for all
           Portfolios:  Investors Fiduciary Trust Company, 127 West 10th Street,
           Kansas City, Missouri 64105.

Item 31.   Management  Services  -  None  not  discussed  in the  Prospectus  or
           Statement of Additional Information for the Registrant.

<PAGE>
PART C.   OTHER INFORMATION (cont'd)
- -------   --------------------------

Item 32.   Undertakings -
- --------   --------------
   
   (1)     The  Registrant undertakes  to  file a post-effective amendment  with
           financial statements, which need not be certified, within four to six
           months from the effective date of this Post-Effective Amendment.

   (2)     The  Registrant  undertakes  to  furnish  to  each  person  to whom a
           prospectus  is  delivered a copy of the  Registrant's  latest  annual
           report to shareholders, upon request and without charge.

   (3)     The Registrant  undertakes 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>
                                   SIGNATURES
                                   ----------

   Pursuant to the requirements of the Securities Act of 1933 and the Investment
Company  Act of  1940,  the  Registrant  has  duly  caused  this  Post-Effective
Amendment No. 21 to the 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 13th day of February, 1998.

                                            SELIGMAN PORTFOLIOS, INC.


                                            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. 21 to the  Registration
Statement  has been signed below by the  following  persons,  in the  capacities
indicated on February 13, 1998.


   Signature                                  Title
   ---------                                  -----

   /s/ WILLIAM C. MORRIS                Chairman of the Board (Principal
- -------------------------               executive officer) and Director
    William C. Morris  

  /s/ BRIAN T. ZINO                     Director and President
- -------------------------
      Brian T. Zino

  /s/ THOMAS G. ROSE                    Treasurer
- --------------------------
      Thomas G. Rose



John R. Galvin, Director                 )
Alice S. Ilchman, Director               )
Frank A. McPherson, Director             )
John E. Merow, Director                  )
Betsy S. Michel, Director                )  /S/ BRIAN T. ZINO
James C. Pitney, Director                )  -----------------
James Q. Riordan, Director               )*Brian T. Zino, Attorney-In-Fact
Robert L. Shafer, Director               )
James N. Whitson, Director               )



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