LORD ABBETT DEVELOPING GROWTH FUND INC /NEW/
485BPOS, 2000-05-31
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                                                      1933 Act File No.  2-62797
                                                     1940 Act File No.  811-2871


                       SECURITIES & 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. 33                [X]

                                   and/or

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

                               Amendment No. 32                        [X]


                   LORD ABBETT DEVELOPING GROWTH FUND, INC.
                   ----------------------------------------
              Exact Name of Registrant as Specified in Charter

            90 Hudson Street, Jersey City, New Jersey 07302-3973
            ----------------------------------------------------
                    Address of Principal Executive Office

                Registrant's Telephone Number (201) 395-2000
                --------------------------------------------

                     Lawrence H. Kaplan, Vice President
            90 Hudson Street, Jersey city, New Jersey 07302-3973
            ----------------------------------------------------
                   (Name and Address of Agent for Service)


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

                  immediately on filing pursuant to paragraph (b)
----------

    X             on June 1, 2000 pursuant to paragraph (b)
-----------

                  60 days after filing pursuant to paragraph (a) (1)
----------

                  on (date) pursuant to paragraph (a) (1)
----------

                  75 days after filing pursuant to paragraph (a) (2)
----------

                  on (date) pursuant to paragraph (a) (2) of Rule 485
----------

If appropriate, check the following box:

                  this post-effective amendment designates a new effective date
----------        for a  previously filed post-effective amendment



<PAGE>

Lord Abbett
Developing Growth Fund


Prospectus
June 1, 2000


[LOGO]


As with all  mutual  funds,  the  Securities  and  Exchange  Commission  has not
approved or  disapproved  these  securities  or passed upon the adequacy of this
prospectus. Any representation to the contrary is a criminal offense.


<PAGE>
                               Table of Contents


                       The Fund


       What you should know   Goal                                            2
             about the Fund   Principal Strategy                              2
                              Main Risks                                      2
                              Performance                                     3
                              Fees and Expenses                               4


                    Your Investment


   Information for managing   Purchases*                                      5
          your Fund account   Sales Compensation                              8
                              Opening Your Account                            8
                              Redemptions                                     9
                              Distributions and Taxes                         9
                              Services For Fund Investors                     10
                              Management                                      11


                  For More Information

          How to learn more   Other Investment Techniques                     12
             about the Fund   Glossary of Shaded Terms                        13
                              Recent Performance                              14



                              Financial Highlights                            15
                              Line Graph Comparison                           16
                              Compensation For Your Dealer                    17



How to learn more about       Back Cover
the Fund and other
Lord Abbett Funds


*    As of  February  1, 2000,  shares of the Fund have not been  available  for
     purchases by new investors, other than through certain qualified retirement
     plans. See "Purchases" in this prospectus for more information.


<PAGE>

GOAL

     The Fund's  investment  objective is long-term  growth of capital through a
     diversified and actively managed portfolio  consisting of developing growth
     companies, many of which are traded over the counter.



PRINCIPAL STRATEGY

     To pursue its goal,  the Fund  primarily  invests  in the common  stocks of
     companies with  above-average,  long-term  growth  potential,  particularly
     smaller companies considered to be in the developing growth phase. The Fund
     uses a bottom-up  stock selection  process,  which means that it focuses on
     the  investment  fundamentals  of companies,  rather than reacting to stock
     market events.  The Fund is broadly  diversified  over many  industries and
     economic  sectors.  Normally,  the Fund  invests  at least 65% of its total
     assets in securities of small companies.

     The  Fund  tries  to  identify  companies  that it  believes  are  strongly
     positioned in the developing  growth phase. This we define as the period of
     swift development after a company's  start-up phase when growth occurs at a
     rate rarely  equaled by  established  companies in their mature  years.  Of
     course,  because the actual growth of a company cannot be foreseen,  we may
     not always be correct in our judgment.

     While typically fully invested,  we may take a temporary defensive position
     by  investing  some of the  Fund's  assets  in  cash  and  short-term  debt
     securities.  This could  reduce the benefit  from any upswing in the market
     and prevent the Fund from achieving its investment objective.


MAIN RISKS

     The Fund is subject to the general risks and considerations associated with
     equity  investing.  The value of your investment will fluctuate in response
     to movements in the stock market in general,  and to the changing prospects
     of individual companies in which the Fund invests.

     The Fund has particular  risks  associated  with growth  stocks.  Different
     types of stocks shift in and out of favor  depending on market and economic
     conditions. Although growth companies may grow faster than other companies,
     they may have greater volatility in their stock prices. In addition, if the
     Fund's assessment of a company's  potential for growth or market conditions
     is wrong,  it could suffer losses or produce poor  performance  relative to
     other funds, even in a rising market.

     Investing  in  small  companies   generally  involves  greater  risks  than
     investing in the stocks of large  companies.  Small companies may have less
     experienced management
     and unproven track records. They may rely on limited product lines and have
     limited financial  resources.  These factors may make them more susceptible
     to setbacks or economic downturns.  In addition,  small company stocks tend
     to have fewer shares  outstanding and trade less frequently than the stocks
     of larger  companies.  As a result,  there may be less  liquidity  in small
     company stocks,  subjecting them to greater price  fluctuations than larger
     company stocks.

     An  investment  in the Fund is not a bank  deposit  and is not  insured  or
     guaranteed  by the  Federal  Deposit  Insurance  Corporation  or any  other
     government  agency.  The Fund is not a complete  investment program and may
     not be appropriate for all investors.  You could lose money by investing in
     the Fund.

We or the Fund refers to Lord Abbett  Developing  Growth  Fund,  Inc.  About the
Fund.  The  Fund  is  a  professionally   managed  portfolio  primarily  holding
securities purchased with the pooled money of investors. It strives to reach its
stated goal, although as with all mutual funds, it cannot guarantee results.

You should read this entire prospectus, including "Other Investment Techniques,"
which concisely  describes the other investment  strategies used by the Fund and
their risks.


The Fund 2

<PAGE>
Developing Growth Fund   `                              Symbols: Class A - LAGWX
                                                                 Class B - LADBX
                                                                 Class C - LADCX
                                                                 Class P - LADPX

PERFORMANCE


     The bar chart and  table  below  provide  some  indication  of the risks of
     investing  in the  Fund  by  illustrating  the  variability  of the  Fund's
     returns.  Each assumes  reinvestment  of dividends and  distributions.  The
     Fund's past  performance  is not  necessarily an indication of how the Fund
     will perform in the future.

     The bar chart shows changes in the performance of the Fund's Class A shares
     from calendar year to calendar year.  This chart does not reflect the sales
     charges  applicable to Class A shares. If the sales charges were reflected,
     returns would be less.


--------------------------------------------------------------------------------
Bar Chart (per calendar year) - Class A Shares
--------------------------------------------------------------------------------

[GRAPHIC OMITTED]

1989 -    14.1%
1990 -    -6.4%
1991 -    56.4%
1992 -    -3.1%
1993 -    12.6%
1994 -     6.2%
1995 -    45.7%
1996 -    22.2%
1997 -    30.8%
1998 -     8.3%
1999 -    38.2%

Best Quarter   1st Q `91  30.0%              Worst Quarter   3rd Q `90   -25.0%

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



     The table below shows how the average  annual  total  returns of the Fund's
     Class A, B, C and P shares  compared to those of a  broad-based  securities
     market index. The Fund's returns reflect payment of the maximum  applicable
     front-end or deferred sales charges.



--------------------------------------------------------------------------------
Average Annual Total Returns Through December 31, 1999
--------------------------------------------------------------------------------

Share Class                    1 Year    5 Years  10 Years   Since Inception(1)
--------------------------------------------------------------------------------
Class A shares                 30.20%    26.82%    18.72%            -
--------------------------------------------------------------------------------
Class B shares                 32.26%      -          -            25.30%
--------------------------------------------------------------------------------
Class C shares                 36.21%      -          -            25.84%
--------------------------------------------------------------------------------
Class P shares                 37.96%      -          -            14.17%
--------------------------------------------------------------------------------
Russell 2000 Index(2)          21.26%    16.69%    13.40%          16.24%(3)
                                                                   16.24%(4)
                                                                   10.01%(5)
--------------------------------------------------------------------------------

(1)  The dates of  inception  of each class are: A - 10/10/73;  B - 8/1/96;  C -
     8/1/96 and P - 1/5/98.

(2)  Performance for the unmanaged  Russell 2000 Index does not reflect any fees
     or expenses. The performance of the index is not necessarily representative
     of the Fund's performance.

(3)  Represents total returns for the period 7/31/96 to 12/31/99,  to correspond
     with Class B inception date.

(4)  Represents total returns for the period 7/31/96 to 12/31/99,  to correspond
     with Class C inception date.

(5)  Represents total returns for the period 1/31/98 to 12/31/99,  to correspond
     with Class P inception date.


                                                                      The Fund 3
<PAGE>

FEES AND EXPENSES

     This table  describes the fees and expenses that you may pay if you buy and
     hold shares of the Fund.
<TABLE>
<CAPTION>


--------------------------------------------------------------------------------------------------
Fee Table
--------------------------------------------------------------------------------------------------
                                               Class A  Class B(2)    Class C      Class P
<S>                                            <C>         <C>         <C>         <C>
Shareholder Fees (Fees paid directly from your investment)
--------------------------------------------------------------------------------------------------
Maximum Sales Charge on Purchases
(as a % of offering price)                     5.75%       none        none        none
--------------------------------------------------------------------------------------------------
Maximum Deferred Sales Charge (see "Purchases") none(1)    5.00%       1.00%(1)    none
--------------------------------------------------------------------------------------------------
Annual Fund Operating Expenses (Expenses deducted from Fund assets) (as a % of average net assets)
--------------------------------------------------------------------------------------------------
Management Fees (See "Management")             0.53%       0.53%       0.53%       0.53%
--------------------------------------------------------------------------------------------------
Distribution (12b-1) and Service Fees(3)       0.41%       1.00%       1.00%       0.45%
--------------------------------------------------------------------------------------------------
Other Expenses                                 0.26%       0.26%       0.26%       0.26%
--------------------------------------------------------------------------------------------------
Total Operating Expenses                       1.20%       1.79%       1.79%       1.24%
--------------------------------------------------------------------------------------------------
</TABLE>


(1)  A  contingent  deferred  sales  charge of 1.00% may be  assessed on certain
     redemptions  (a) of Class A shares  made  within  24 months  following  any
     purchases  made without a sales charge,  and (b) Class C shares if they are
     redeemed before the first anniversary of their purchase.

(2)  Class B shares will convert to Class A shares on the eighth  anniversary of
     your original purchase of Class B shares.

(3)  Because 12b-1 distribution fees are paid out on an ongoing basis, over time
     they will increase the cost of your  investment  and may cost you more than
     paying other types of sales charges.


--------------------------------------------------------------------------------
Example

--------------------------------------------------------------------------------
This  Example is intended to help you compare the cost of  investing in the Fund
with the cost of investing in other mutual  funds.  This  Example,  like that in
other  funds'  prospectuses,  assumes  that you  invest  $10,000  in the Fund at
maximum sales charge, if any, for the time periods indicated and then redeem all
of your shares at the end of those  periods.  The Example also assumes that your
investment  has a 5% return  each year and that the  Fund's  operating  expenses
remain the same.  Although  your actual  costs may be higher or lower,  based on
these assumptions your costs (including any applicable contingent deferred sales
charges)  would be:
<TABLE>
<CAPTION>

<S>                          <C>              <C>             <C>                       <C>
Class A shares               $690             $934            $1,197                    $1,946
--------------------------------------------------------------------------------------------------
Class B shares               $682             $863            $1,170                    $1,935
--------------------------------------------------------------------------------------------------
Class C shares               $282             $563            $  970                    $2,105
--------------------------------------------------------------------------------------------------
Class P shares               $126             $393            $  681                    $1,500
--------------------------------------------------------------------------------------------------

You would have paid the following expenses if you did not redeem your shares:

Class A shares               $690             $934            $1,197                    $1,946
--------------------------------------------------------------------------------------------------
Class B shares               $182             $563            $  970                    $1,935
--------------------------------------------------------------------------------------------------
Class C shares               $182             $563            $  970                    $2,105
--------------------------------------------------------------------------------------------------
Class P shares               $126             $393            $  681                    $1,500
--------------------------------------------------------------------------------------------------

</TABLE>

Management fees are payable to Lord, Abbett & Co. ("Lord Abbett") for the Fund's
investment management.

12b-1 fees refer to fees incurred for activities that are primarily  intended to
result in the sale of Fund  shares  and  service  fees for  shareholder  account
service and maintenance.

Other  expenses  include fees paid for  miscellaneous  items such as shareholder
service fees and professional fees.

4 The Fund

<PAGE>

                                 Your Investment

PURCHASES


     The Fund offers in this prospectus four classes of shares:  Classes A, B, C
     and P, each with different expenses and dividends.  You may purchase shares
     at the net asset value ("NAV") per share  determined  after we receive your
     purchase  order  submitted  in proper  form.  A front-end  sales  charge is
     normally  added to the NAV in the case of the Class A  shares.  There is no
     front-end  sales  charge in the case of the  Class B,  Class C, and Class P
     shares,  although there may be a contingent  deferred sales charge ("CDSC")
     on Class B and Class C shares as  described  below.  You  should  read this
     section  carefully to determine  which class of shares  represents the best
     investment option for your particular situation. It may not be suitable for
     you to place a purchase  order for Class B shares of $500,000 or more, or a
     purchase order for Class C shares of $1,000,000 or more. You should discuss
     purchase options with your investment professional.


     For more information, see "Alternative Sales Arrangements" in the Statement
     of Additional Information.

     We reserve the right to withdraw  all or any part of the  offering  made by
     this  prospectus or to reject any purchase order. We also reserve the right
     to waive or change minimum investment requirements. All purchase orders are
     subject to our acceptance  and are not binding until  confirmed or accepted
     in writing.


================================================================================
Share Classes
================================================================================
Class A  o normally offered with a front-end sales charge

Class B  o no front-end sales charge, however, a CDSC is applied to shares sold
           prior to the sixth anniversary of purchase

         o higher annual expenses than Class A shares o automatically  converts
           to Class A shares after eight years

Class C  o no front-end sales charge,  however, a CDSC is applied to shares sold
           prior to the first anniversary of purchase

         o higher annual expenses than Class A shares

Class P  o available to certain  pension or  retirement  plans and pursuant to a
           Mutual Fund Fee Based Program




================================================================================
Front-End Sales Charges - Class A Shares

================================================================================
                                                                  To Compute
                             As a % of         As a % of         OfferingPrice
Your Investment           Offering Price    Your Investment      Divide NAV by
================================================================================
Less than $50,000             5.75%             6.10%                 .9425
================================================================================
$50,000 to $99,999            4.75%             4.99%                 .9525
================================================================================
$100,000 to $249,999          3.75%             3.99%                 .9625
================================================================================
$250,000 to $499,999          2.75%             2.83%                 .9725
================================================================================
$500,000 to $999,999          2.00%             2.04%                 .9800
================================================================================
$1,000,000 and over       No Sales Charge                            1.0000
================================================================================


As of February 1, 2000,  all classes (A, B, C and P) have not been available for
purchase by new investors other than through certain qualified retirement plans.
Existing  share-holders may continue to invest in the Fund by adding to existing
accounts.  Qualified plans currently  offering the Fund as an investment  option
may open new participant  accounts.  However,  it is the Fund's intention not to
accept any purchase order for more than $5 million.


NAV per share for each class of Fund shares is  calculated  each business day at
the close of regular trading on the New York Stock Exchange  ("NYSE"),  normally
4:00 p.m.  Eastern time.  Purchases and sales of Fund shares are executed at the
NAV next  determined  after the Fund  receives  your  order in proper  form.  In
calculating NAV, securities for which market quotations are available are valued
at those quotations.  Securities for which such quotations are not available are
valued at fair value under procedures approved by the Board of the Fund.



                                                               Your Investment 5
<PAGE>


     Reducing  Your  Class A  Front-End  Sales  Charges.  Class A shares  may be
     purchased  at a  discount  if you  qualify  under  either of the  following
     conditions:

     o    Rights of  Accumulation  -- A Purchaser may apply the value (at public
          offering price) of the shares already owned to a new purchase of Class
          A shares of any Eligible Fund in order to reduce the sales charge.


     o    Letter of  Intention  -- A  Purchaser  of Class A shares may  purchase
          additional  shares of any  Eligible  Fund over a  13-month  period and
          receive the same sales  charge as if you had  purchased  all shares at
          once.   Shares   purchased   through   reinvestment  of  dividends  or
          distributions are not included. A Letter of Intention can be backdated
          90 days. Current holdings under Rights of Accumulation can be included
          in a Letter of Intention.



     For  more  information  on  eligibility  for  these  privileges,  read  the
     applicable sections in the attached application.

     Class A Share Purchases  Without A Front-End  Sales Charge.  Class A shares
     may  be  purchased  without  a  front-end  sales  charge  under  any of the
     following conditions:

     o    purchases of $1 million or more +

     o    purchases by Retirement Plans with at least 100 eligible employees +

     o    purchases under a Special Retirement Wrap Program +

     o    purchases made with dividends and  distributions  on Class A shares of
          another Eligible Fund

     o    purchases  representing  repayment  under the loan feature of the Lord
          Abbett- sponsored prototype 403(b) Plan for Class A shares

     o    purchases by employees of any  consenting  securities  dealer having a
          sales agreement with Lord Abbett Distributor


     o    purchases under a Mutual Fund Fee Based Program


     o    purchases by trustees or custodians  of any pension or profit  sharing
          plan, or payroll  deduction  IRA for the  employees of any  consenting
          securities   dealer  having  a  sales   agreement   with  Lord  Abbett
          Distributor

     o    purchases by each Lord  Abbett-sponsored  fund's Directors or Trustees
          (including  retired  Directors  or  Trustees),  officers  of each Lord
          Abbett-sponsored  fund,  employees and partners of Lord Abbett.  These
          categories  of purchasers  also include  other family  members of such
          purchasers.


     See  the  Statement  of  Additional  Information  for a  listing  of  other
     categories of purchasers who qualify for Class A share purchases  without a
     front-end sales charge.

     +    These categories may be subject to a CDSC.

     Class A Share CDSC.  If you buy Class A shares under one of the starred (o)
     categories  listed  above and you redeem any of them within 24 months after
     the month in which you  initially  purchased  them,  the Fund will normally
     collect a CDSC of 1%.

     The  Class  A  share  CDSC  generally  will be  waived  for  the  following
     conditions:

     o    benefit  payments  under  Retirement  Plans in connection  with loans,
          hardship withdrawals, death, disability,  retirement,  separation from
          service   or  any   excess   distribution   under   Retirement   Plans
          (documentation may be required)

     o    redemptions continuing as investments in another fund participating in
          a Special Retirement Wrap Program.

Retirement Plans include employer-sponsored  retirement plans under the Internal
Revenue Code,  excluding Individual  Retirement  Accounts.  Lord Abbett offers a
variety  of  Retirement  Plans.  Call  800-253-7299  for  information  about:

o    Traditional, Rollover, Roth and Education IRAs

o    Simple IRAs, SEP-IRAs, 401(k) and 403(b) accounts

o    Defined Contribution Plans.


Lord Abbett Distributor LLC ("Lord Abbett Distributor") acts as agent
for the Fund to work with investment professionals who buy and/or sell shares of
the Fund on behalf of their clients. Generally, Lord Abbett Distributor does not
sell Fund shares directly to investors.


Benefit Payment Documentation
(Class A CDSC only)

o    under $50,000 - no documentation necessary

o    over $50,000 - reason for benefit payment must be received in writing.  Use
     the address indicated under "Opening your Account".

6 Your Investment

<PAGE>

     Class B Share  CDSC.  The CDSC for Class B shares  normally  applies if you
     redeem your shares before the sixth  anniversary of their initial purchase.
     The  CDSC  declines  the  longer  you own  your  shares,  according  to the
     following schedule:

================================================================================
Contingent Deferred Sales Charges - Class B Shares

================================================================================
Anniversary(1) of the day on                    Contingent Deferred Sales Charge
which the purchase order                        on redemption (as % of amount
was accepted                                    subject to charge)
On                             Before
================================================================================
                               1st                          5.0%
================================================================================
1st                            2nd                          4.0%
================================================================================
2nd                            3rd                          3.0%
================================================================================
3rd                            4th                          3.0%
================================================================================
4th                            5th                          2.0%
================================================================================
5th                            6th                          1.0%
================================================================================
on or after the 6th(2)                                      None
================================================================================

(1)  The  anniversary is the same calendar day in each respective year after the
     date of purchase.  For example, the anniversary for shares purchased on May
     1 will be May 1 of each succeeding year.

(2)  Class B shares will  automatically  convert to Class A shares on the eighth
     anniversary of the purchase of Class B shares.


     Different  conversion schedules may apply to Class B shares purchased by or
     on behalf of retirement  plans in connection with certain special  programs
     or platforms created and maintained by certain broker-dealer firms.


     The  Class B share  CDSC  generally  will be  waived  under  the  following
     circumstances:

     o    benefit  payments  under  Retirement  Plans in connection  with loans,
          hardship withdrawals, death, disability,  retirement,  separation from
          service or any excess  contribution or distribution  under  Retirement
          Plans

     o    Eligible  Mandatory  Distributions  under 403(b) Plans and  individual
          retirement accounts

     o    death of the shareholder

     o    redemptions of shares in connection with Systematic  Withdrawal  Plans
          (up to 12% per year).


     See  "Systematic  Withdrawal  Plan" under "Services For Fund Investors" for
     more information on CDSCs with respect to Class B shares.

     Class C Share CDSC. The 1% CDSC for Class C shares normally  applies if you
     redeem your shares  before the first  anniversary  of the  purchase of such
     shares.


     Class P Shares.  Class P shares have lower annual expenses than Class B and
     Class C shares, no front-end sales charge,  and no CDSC. Class P shares are
     currently  sold and redeemed at NAV (a) pursuant to a Mutual Fund Fee Based
     Program or (b) to the  trustees of, or  employer-sponsors  with respect to,
     pension or retirement plans with at least 100 eligible employees (such as a
     plan under Section 401(a),  401(k) or 457(b) of the Internal  Revenue Code)
     which engage an investment  professional  providing, or participating in an
     agreement  to  provide,   certain   recordkeeping,   administrative  and/or
     sub-transfer  agency  services  to  the  Fund  on  behalf  of the  Class  P
     shareholders.



CDSC,   regardless  of  class,  is  not  charged  on  shares  acquired   through
reinvestment of dividends or capital gains  distributions  and is charged on the
original  purchase  cost or the current  market  value of the shares at the time
they are being sold, which-ever is lower. In addition,  repayment of loans under
Retirement  Plans and 403(b)  Plans will  constitute  new sales for  purposes of
assessing the CDSC.
To minimize  the amount of any CDSC, the Fund redeems  shares in the  following
order:

1.   shares acquired by reinvestment of dividends and capital gains (always free
     of a CDSC)

2.   shares  held for six years or more (Class B) or two years or more after the
     month of purchase (Class A) or one year or more (Class C)

3.   shares  held the longest  before the sixth  anniversary  of their  purchase
     (Class B) or before  the  second  anniversary  after the month of  purchase
     (Class  A) or before  the first  anniversary  of their  purchase  (Class C)
     investors.




Your Investment

<PAGE>



SALES COMPENSATION

     As part of its  plan for  distributing  shares,  the  Fund and Lord  Abbett
     Distributor pay sales and service  compensation to Authorized  Institutions
     that sell the Fund's shares and service its shareholder accounts.

     Sales compensation originates from two sources, as shown in the table "Fees
     and Expenses": sales charges, which are paid directly by shareholders;  and
     12b-1  distribution  fees which are paid out of the Fund's assets.  Service
     compensation  originates  from 12b-1  service  fees.  The total  12b-1 fees
     payable  with  respect to each share class are .35% of Class A  shares(plus
     distribution fees of up to 1.00% on certain qualifying purchases), 1.00% of
     Class B and Class C shares, and .45% of Class P shares. The amounts payable
     as compensation to Authorized Institutions,  such as your dealer, are shown
     in  the  chart  at  the  end  of  this  prospectus.  The  portion  of  such
     compensation  paid to Lord Abbett  Distributor  is  discussed  under "Sales
     Activities" and "Service Activities."  Sometimes we do not pay compensation
     where  tracking  data is not  available  for certain  accounts or where the
     Authorized  Institution waives part of the compensation.  In such cases, we
     may not require payment of any otherwise applicable CDSC.

     We may pay Additional  Concessions to Authorized  Institutions from time to
     time.

     Sales  Activities.  We may use 12b-1  distribution  fees to pay  Authorized
     Institutions to finance any activity which is primarily  intended to result
     in the sale of shares.  Lord  Abbett  Distributor  uses its  portion of the
     distribution fees attributable to the Fund's Class A and Class C shares for
     activities which are primarily intended to result in the sale of such Class
     A and Class C shares,  respectively.  These activities include, but are not
     limited  to,  printing  of   prospectuses   and  statements  of  additional
     information and reports for other than existing  shareholders,  preparation
     and distribution of advertising and sales material,  expenses of organizing
     and  conducting  sales  seminars,   Additional  Concessions  to  Authorized
     Institutions,  the cost necessary to provide distribution-related  services
     or  personnel,  travel,  office  expenses,  equipment  and other  allocable
     overhead.

     Service   Activities.   We  may  pay  12b-1   service  fees  to  Authorized
     Institutions  for any  activity  which is  primarily  intended to result in
     personal  service  and/or the  maintenance  of  shareholder  accounts.  Any
     portion of the service fees paid to Lord Abbett Distributor will be used to
     service and maintain shareholder accounts.




OPENING YOUR ACCOUNT


     MINIMUM INITIAL INVESTMENT
o    Regular Account                                                      $1,000
--------------------------------------------------------------------------------
o    Individual Retirement Accounts and
     403(b) Plans under the Internal Revenue Code                           $250
--------------------------------------------------------------------------------
o    Uniform Gift to Minor Account                                          $250
--------------------------------------------------------------------------------
o    Invest-A-Matic                                                         $250
--------------------------------------------------------------------------------
For Retirement Plans and Mutual Fund Fee Based Programs no minimum investment is
required, regardless of share class.


     You may purchase shares through any independent securities dealer who has a
     sales  agreement  with  Lord  Abbett  Distributor  or you can  fill out the
     attached  application  and send it to the Fund at the address stated below.
     You should carefully read the paragraph below entitled "Proper Form" before
     placing your order to ensure that your order will be accepted.

8 Your Investment

<PAGE>



     Lord Abbett Developing Growth Fund, Inc.
     P.O. Box 219100
     Kansas City, MO 64121

     Proper Form. An order  submitted  directly to the Fund must contain:  (1) a
     completed application, and (2) payment by check. When purchases are made by
     check,  redemption  proceeds  will not be paid  until the Fund or  transfer
     agent is  advised  that the  check  has  cleared,  which  may take up to 15
     calendar days. For more information call the Fund at 800-821-5129.

     By Exchange. Telephone the Fund at 800-821-5129 to request an exchange from
     any eligible Lord Abbett-sponsored fund.




REDEMPTIONS

     By Broker.  Call your investment  professional  for  instructions on how to
     redeem your shares.

     By  Telephone.  To obtain the proceeds of a  redemption  of $50,000 or less
     from  your  account,  you or your  representative  should  call the Fund at
     800-821-5129.

     By Mail.  Submit a written  redemption  request  indicating  the name(s) in
     which the account is registered, the Fund's name, the class of shares, your
     account number, and the dollar value or number of shares you wish to sell.

     Include all necessary signatures. If the signer has any Legal Capacity, the
     signature and capacity must be guaranteed by an Eligible Guarantor. Certain
     other legal documentation may be required.  For more information  regarding
     proper documentation call 800-821-5129.

     Normally a check  will be mailed to the  name(s)  and  address in which the
     account is registered (or otherwise  according to your instruction)  within
     three business days after receipt of your redemption request.  Your account
     balance  must be  sufficient  to cover the amount  being  redeemed  or your
     redemption order will not be processed.  Under unusual  circumstances,  the
     Fund may suspend redemptions, or postpone payment for more than seven days,
     as permitted by federal securities laws.

     To determine if a CDSC applies to a  redemption,  see "Class A share CDSC,"
     "Class B share CDSC" or "Class C share CDSC."


DISTRIBUTIONS AND TAXES


     The Fund expects to pay income  dividends and capital gains  distributions,
     if any, annually.  Your distributions will be reinvested in the Fund unless
     you  instruct  the  Fund to pay  them to you in  cash.  There  are no sales
     charges on  reinvestments.  The tax status of distributions is the same for
     all  shareholders  regardless  of how long they have owned  Fund  shares or
     whether distributions are reinvested or paid in cash.

     Except in tax-advantaged accounts, any sale, redemption or exchange of Fund
     shares may be taxable to the shareholder.

     Information on the tax treatment of distributions,  including the source of
     dividends and distributions of capital gains by the Fund, will be mailed to
     shareholders  each year.  Because  everyone's tax situation is unique,  you
     should  consult your tax adviser  regarding the treatment of  distributions
     under the federal,  state and local tax rules that apply to you, as well as
     the tax  consequences of gains or losses from the redemption or exchange of
     your shares.


Exchange  Limitations.  Exchanges should not be used to try to take advantage of
short-term swings in the market.  Frequent  exchanges create higher expenses for
the Fund.  Accordingly,  the Fund reserves the right to limit or terminate  this
privilege  for  any  shareholder   making  frequent  exchanges  or  abusing  the
privilege.  The Fund also may revoke the privilege for all shareholders  upon 60
days written notice.

Small Accounts.  Our Board may authorize  closing any account in which there are
fewer than 25 shares if it is in the Fund's best interest to do so.

Eligible Guarantor is any broker or bank that is a member of the medallion stamp
program.  Most major securities  firms and banks are members of this program.  A
notary public is not an eligible guarantor.



                                                               Your Investment 9



Services for Fund Investors
Automatic Services
     Buying or selling shares  automatically is easy with the services described
     below.  With each  service,  you select a schedule  and amount,  subject to
     certain  restrictions.  You may set up most of these  services when filling
     out your application or by calling 800-821-5129.


<TABLE>
<CAPTION>

--------------------------------------------------------------------------------------------------------------------
<S>                     <C>
For investing

Invest-A-Matic          You may make fixed,  periodic investments ($50 minimum) into your
(Dollar-cost            Fund account by means of automatic money transfers from your bank
checking averaging)     account. See the attached application for instructions.

Div-Move                You may automatically reinvest the dividends and distributions from your account
                        into another account in any Eligible Fund ($50 minimum).


For selling shares

Systematic              You can make regular withdrawals from most Lord Abbett Funds. Automatic
Withdrawal              cash withdrawals will be paid to you from your account in fixed or variable
Plan ("SWP")            amounts.  To establish a plan, the value of your shares must be at
                        least $10,000,  except for Retirement Plans for which there is no minimum.  Your
                        shares must be in non-certificate form.

Class B shares          The CDSC will be waived on redemptions of up to 12% of the current net
                        asset value of your  account at the time of your  SWPrequest.  For Class B share
                        redemptions  over 12% per year,  the CDSC will apply to the  entire  redemption.
                        Please contact the Fund for assistance in minimizing the CDSC in this situation.

Class B and             Redemption proceeds due to a SWP for Class B and Class C shares will be
C shares                redeemed in the order described under "CDSC" under "Purchases."


--------------------------------------------------------------------------------------------------------------------
</TABLE>
OTHER SERVICES

     Telephone  Investing.  After  we have  received  the  attached  application
     (selecting  "yes"  under  Section  8C and  completing  Section  7), you may
     instruct us by phone to have money  transferred  from your bank  account to
     purchase shares of the Fund for an existing account. The Fund will purchase
     the requested shares when it receives the money from your bank.


     Exchanges.  You or your  investment  professional  may instruct the Fund to
     exchange  shares of any class for shares of the same class of any  Eligible
     Fund.  Instruction may be provided in writing or by telephone,  with proper
     identification, by calling 800-821-5129. The Fund must receive instructions
     for the exchange  before the close of the NYSE on the day of your call,  in
     which case you will get the NAV per share of the Eligible  Fund  determined
     on that day.  Exchanges will be treated as a sale for federal tax purposes.
     Be sure to read the  current  prospectus  for any Fund  into  which you are
     exchanging.


     Reinvestment Privilege. If you sell shares of the Fund, you have a one-time
     right to  reinvest  some or all of the  proceeds  in the same  class of any
     Eligible  Fund within 60 days  without a sales  charge.  If you paid a CDSC
     when you sold your  shares,  you will be  credited  with the  amount of the
     CDSC. All accounts involved must have the same registration.

     Account  Statements.  Every Lord  Abbett  investor  automatically  receives
     quarterly account statements.

     Householding. Shareholders with the same last name and address will receive
     a single copy of a prospectus and an annual and semi-annual report,  unless
     additional  reports  are  specifically  requested  in  writing to the Fund.

Telephone Transactions. You have this privilege unless you refuse it in writing.
For your security,  telephone  transaction  requests are recorded.  We will take
measures to verify the  identity  of the  caller,  such as asking for your name,
account  number,  social  security or taxpayer  identification  number and other
relevant  information.  The Fund will not be liable for  following  instructions
communicated by telephone that it reasonably believes to be genuine.
Transactions  by  telephone  may be  difficult  to implement in times of drastic
economic or market change.



10 Your Investment

<PAGE>

     Account Changes. For any changes you need to make to your account,  consult
     your investment  professional or call the Fund at 800-821-5129.  Systematic
     Exchange.  You or your investment  professional can establish a schedule of
     exchanges between the same classes of any Eligible Fund.


MANAGEMENT


     The Fund's  investment  adviser is Lord,  Abbett & Co.,  90 Hudson  Street,
     Jersey City, NJ 07302-3973. Founded in 1929, Lord Abbett manages one of the
     nation's oldest mutual fund complexes,  with  approximately  $35 billion in
     more than 40 mutual fund portfolios and other advisory  accounts.  For more
     information  about the services Lord Abbett  provides to the Fund,  see the
     Statement of Additional Information.

     Lord  Abbett is entitled to a  management  fee based on the Fund's  average
     daily net assets. The fee is calculated and payable monthly. The management
     fee is calculated at the following annual rate:

             .75 of 1% on the first $100  million of average  daily net  assets,
             .50 of 1% on assets over $100 million.

     Based on this  calculation,  the management fee paid to Lord Abbett for the
     fiscal  year ended  January  31, 2000 was at an annual rate of .53 of 1% of
     the Fund's average daily net assets.

     Lord Abbett uses a team of investment managers and analysts acting together
     to manage the Fund's  investments.  Stephen  J.  McGruder,  Partner of Lord
     Abbett,  heads the team; the other senior members include Lesley-Jane Dixon
     and Rayna  Lesser.  Mr.  McGruder  and Ms. Dixon have been with Lord Abbett
     since  1995;  Ms.  Lesser has been with Lord Abbett  since  1996.  Prior to
     joining  Lord  Abbett,  Mr.  McGruder  was a portfolio  manager  with Wafra
     Investment  Advisory Group.  Prior to joining Lord Abbett, Ms. Dixon was an
     equity analyst with Wafra Investment Advisory Group. Ms. Lesser joined Lord
     Abbett directly from Barnard College.



                                                              Your Investment 11
<PAGE>

                              For More Information

OTHER INVESTMENT TECHNIQUES

     This section describes some of the investment techniques that might be used
by the Funds, and their risks.


     Adjusting  Investment  Exposure.  The Fund may, but is not required to, use
     various strategies to change its investment  exposure to adjust to changing
     security prices,  interest rates, currency exchange rates, commodity prices
     and other factors.  The Fund may use these  transactions to change the risk
     and return characteristics of its portfolio.
     If we judge market  conditions  incorrectly or use a strategy that does not
     correlate well with the Fund's investments, it could result in a loss, even
     if we intended to lessen risk or enhance  returns.  These  transactions may
     involve a small  investment  of cash  compared to the magnitude of the risk
     assumed and could produce  disproportionate  gains or losses.  Also,  these
     strategies could result in losses if the counterparty to a transaction does
     not perform as promised.

     Foreign Securities.  The Fund may invest up to 10% of its assets in foreign
     securities. Foreign securities are securities primarily traded in countries
     outside the United States.  Foreign  markets and the  securities  traded in
     them are not  subject to the same  degree of  regulation  as U.S.  markets.
     Securities clearance and settlement  procedures may be different in foreign
     countries. There may be less trading volume in foreign markets,  subjecting
     the  securities  traded in them to higher price  fluctuations.  Transaction
     costs  may be  higher  in  foreign  markets.  The  Fund  may  hold  foreign
     securities  which  trade on days when the Fund does not sell  shares.  As a
     result, the value of the Fund's portfolio  securities may change on days an
     investor may not purchase or sell Fund shares.

     Foreign issuers are generally not subject to similar,  uniform  accounting,
     auditing and financial  reporting  requirements  as U.S.  issuers.  Foreign
     investments  may be  affected  by changes  in  currency  rates or  currency
     controls.  Certain foreign countries may limit the Fund's ability to remove
     its assets from the  country.  With respect to certain  foreign  countries,
     there is a possibility of  nationalization,  expropriation  or confiscatory
     taxation, imposition of withholding or other taxes, and political or social
     instability which could affect investments in those countries.

     Short-Term  Fixed-Income  Securities.  The  Fund is  authorized  to  invest
     temporarily in certain short-term fixed income securities.  Such securities
     may be used to invest  uncommitted cash balances,  to maintain liquidity to
     meet shareholder  redemptions,  or to take a temporary  defensive  position
     against market declines. These securities include: oblig-
     ations  of the U.S.  Government  and its  agencies  and  instrumentalities;
     commercial paper, bank certificates of deposit,  and bankers'  acceptances;
     and repurchase agreements collateralized by these securities.






12 For More Information
<PAGE>


GLOSSARY OF SHADED TERMS

     Additional Concessions. Lord Abbett Distributor may, for specified periods,
     allow  dealers to retain  the full sales  charge for sales of shares or may
     pay an additional  concession to a dealer who sells a minimum dollar amount
     of our shares and/or shares of other Lord  Abbett-sponsored  funds. In some
     instances,  such  additional  concessions  will be offered  only to certain
     dealers expected to sell significant amounts of shares. Additional payments
     may  be  paid  from  Lord  Abbett   Distributor's  own  resources  or  from
     distribution  fees  received  from the Fund and will be made in the form of
     cash or, if  permitted,  non-cash  payments.  The  non-cash  payments  will
     include business seminars at Lord Abbett's headquarters or other locations,
     including meals and entertainment,  or the receipt of merchandise. The cash
     payments may include payment of various business expenses of the dealer.

     In  selecting  dealers to  execute  portfolio  transactions  for the Fund's
     portfolio,  if two or more dealers are considered capable of obtaining best
     execution,  we may prefer the dealer who has sold our shares  and/or shares
     of other Lord Abbett-sponsored funds.

     Authorized  Institutions.  Institutions  and  persons  permitted  by law to
     receive  service  and/or  distribution  fees  under a Rule  12b-1  plan are
     "Authorized   Institutions."  Lord  Abbett  Distributor  is  an  Authorized
     Institution.

     Eligible  Fund. An Eligible Fund is any Lord  Abbett-sponsored  fund except
     for:  (1)  certain  tax-free,   single-state  funds  where  the  exchanging
     shareholder  is a resident  of a state in which such  series is not offered
     for sale; (2) Lord Abbett Equity Fund; (3) Lord Abbett Series Fund; and (4)
     Lord Abbett U.S. Government  Securities Money Market Fund ("GSMMF") (except
     for holdings in GSMMF which are  attributable to any shares  exchanged from
     the Lord Abbett family of funds).  An Eligible Fund also is any  Authorized
     Institution's   affiliated   money  market  fund   satisfying  Lord  Abbett
     Distributor as to certain omnibus accounts and other criteria.

     Eligible Mandatory Distributions.  If Class B shares represent a part of an
     individual's total IRA or 403(b)  investment,  the CDSC will be waived only
     for that part of a mandatory  distribution which bears the same relation to
     the entire mandatory  distribution as the Class B share investment bears to
     the total investment.

     Legal  Capacity.  This term refers to the authority of an individual to act
     on behalf of an entity or other  person(s).  For  example,  if a redemption
     request were to be made on behalf of the estate of a deceased  shareholder,
     John W. Doe, by a person  (Robert A. Doe) who has the legal capacity to act
     for the estate of the  deceased  shareholder  because he is the executor of
     the estate,  then the request  must be executed as follows:  Robert A. Doe,
     Executor of the Estate of John W. Doe. That  signature  using that capacity
     must be guaranteed by an Eligible Guarantor.

     To give another example,  if a redemption request were to be made on behalf
     of the ABC Corporation by a person (Mary B. Doe) who has the legal capacity
     to act on the behalf of the  Corporation,  because she is the  president of
     the Corporation,  the request must be executed as follows:  ABC Corporation
     by Mary B. Doe,  President.  That  signature  using that  capacity  must be
     guaranteed by an Eligible Guarantor (see example in right column).

     Mutual Fund Fee Based Program.  Certain  unaffiliated  authorized  brokers,
     dealers, registered investment advisers or other financial institutions who
     either (1) have an arrangement  with Lord Abbett  Distributor in accordance
     with  certain  standards  approved  by Lord Abbett  Distributor,  providing
     specifically  for the use of  fund  shares  (and  sometimes  providing  for
     acceptance  of  orders  for  such  shares  on  our  behalf)  in  particular
     investment  products  made  available for a fee to clients of such brokers,
     dealers,  registered


GUARANTEED SIGNATURE. An acceptable form of guarantee would be as follows:

  In the case of the estate --

    Robert A. Doe
    Executor of the Estate of
    John W. Doe

    [Date]

             SIGNATURE GUARANTEED
             MEDALLION GUARANTEED
              NAME OF GUARANTOR

            [SIGNATURE ILLEGIBLE]
--------------------------------------------------
                            AUTHORIZED SIGNATURE
(960)                            X 9 6 0 3 4 7 0
SECURITIES TRANSFER AGENTS MEDALLION PROGRAM'sm'
                                              SR

  In the case of the corporation --
  ABC Corporation

    Mary B. Doe

    By Mary B. Doe, President

    [Date]

             SIGNATURE GUARANTEED
             MEDALLION GUARANTEED
              NAME OF GUARANTOR

            [SIGNATURE ILLEGIBLE]
--------------------------------------------------
                            AUTHORIZED SIGNATURE
(960)                            X 9 6 0 3 4 7 0
SECURITIES TRANSFER AGENTS MEDALLION PROGRAM'sm'
                                              SR


                                                         For More Information 13

<PAGE>

     investment  advisers  and other  financial  institutions,  or (2) charge an
     advisory  consulting  or other fee for their  services  and buy  shares for
     their own accounts or the accounts of their clients.

     Purchaser.  The  term  "purchaser"  includes:  (1)  an  individual,  (2) an
     individual and his or her spouse and children under the age of 21 and (3) a
     trustee or other fiduciary  purchasing  shares for a single trust estate or
     single fiduciary  account  (including a pension,  profit-sharing,  or other
     employee  benefit trust qualified under Section 401 of the Internal Revenue
     Code - more than one qualified employee benefit trust of a single employer,
     including its consolidated subsidiaries,  may be considered a single trust,
     as may qualified  plans of multiple  employers  registered in the name of a
     single bank trustee as one account),  although more than one beneficiary is
     involved.

     Special  Retirement  Wrap  Program.  A program  sponsored by an  authorized
     institution showing one or more  characteristics  distinguishing it, in the
     opinion of Lord Abbett  Distributor  from a Mutual Fund Fee Based  Program.
     Such  characteristics  include,  among  other  things,  the  fact  that  an
     Authorized  Institution does not charge its clients any fee of a consulting
     or advisory nature that is economically  equivalent to the distribution fee
     under  the  Class A 12b-1  Plan and the fact that the  program  relates  to
     participant- directed Retirement Plans.


RECENT PERFORMANCE


     The following is a discussion of recent performance for the 12-month period
     ending January 31, 2000.

     The Fund ended its fiscal  year with  solid  performance,  as the stocks of
     small growth- oriented  companies  rebounded from their difficulties in the
     early part of 1999.  Throughout the period,  our  investment  team remained
     true to its  investment  strategy,  focusing  on  acquiring  the  stocks of
     well-run small  companies with strong current  earnings and future earnings
     growth potential. Due to capacity constraints, and in order to maintain the
     integrity of our investment  philosophy,  the Developing Growth Fund closed
     its doors to all new  investors at the end of business on January 31, 2000.
     Current investors may continue to add to existing accounts.

     Our investments in technology-related  companies significantly  contributed
     to the Fund's strong performance  during the year. In particular,  the Fund
     was helped by our  holdings in  technology  outsourcing  companies -- those
     that help corporate America  implement and operate Internet  businesses and
     wireless communication companies.

     Conversely,  stocks of  companies  in the Fund whose  earnings did not meet
     Wall Street expectations did not perform well. Many of these companies were
     impacted by business  slowdowns  as they were forced to focus on  potential
     Y2K  problems.  Investors  reacted in the extreme to any company  that fell
     short of earnings expectations, causing its stock price to fall sharply.

     The strong  performance  of the  stocks of small  technology  companies  in
     recent months  increased our  technology  weighting.  While  valuations for
     technology  stocks have  reached  high levels in some cases,  our  research
     suggests  that the  demand  for  technology  goods  and  services  warrants
     continued exposure to the stocks of some of these companies.

     We  believe  we are  entering  a  favorable  environment  for small  growth
     companies,  as the economy  continues to exhibit signs of steady growth and
     low inflation. Our research indicates that substantial value exists in many
     of these  smaller  companies,  as they offer greater  growth  potential and
     better value than the average large company growth stock.


14 For More Information
<PAGE>

FINANCIAL HIGHLIGHTS


     This  table  describes  the  Fund's  performance  for  the  fiscal  periods
     indicated.  "Total return" shows how much your investment in the Fund would
     have  increased  (or  decreased)  during  each  period,  assuming  you  had
     reinvested all dividends and distributions. These Financial Highlights have
     been audited by Deloitte & Touche LLP, the Fund's independent  auditors, in
     conjunction  with their  annual audit of the Fund's  financial  statements.
     Financial  statements  for the fiscal  year ended  January 31, 2000 and the
     Independent  Auditors'  Report  thereon  appear  in the  Annual  Report  to
     Shareholders   for  the  fiscal  year  ended  January  31,  2000,  and  are
     incorporated  by reference  into the Statement of  Additional  Information,
     which is available upon request.  Certain  information  reflects  financial
     results for a single fund share.


<TABLE>
<CAPTION>

====================================================================================================================================
                                                          Class A Shares                               Class B Shares
------------------------------------------------------------------------------------------------------------------------------------
                                                      Year Ended January 31,                       Year Ended January 31,
Per Share Operating Performance:         2000       1999       1998        1997    1996    2000      1999      1998      1997(d)
<S>                                     <C>        <C>        <C>        <C>      <C>    <C>       <C>        <C>       <C>
Net asset value, beginning of year      $16.25     $14.27     $12.80     $11.49   $9.58  $15.98    $14.12     $12.75    $12.14
====================================================================================================================================
Income (loss) from investment operations
====================================================================================================================================
Net investment loss                       (.11)(a)   (.07)(a)   (.10)(a)   (.03)   (.02)   (.21)(a)  (.17)(a)   (.20)(a)  (.05)
====================================================================================================================================
Net realized and unrealized
====================================================================================================================================
 gain on investments                      4.10       2.10       3.16       3.12    4.80    4.01      2.06       3.14      2.28
====================================================================================================================================
Total from investment operations          3.99       2.03       3.06       3.09    4.78    3.80      1.89       2.94      2.23
====================================================================================================================================
Distributions
====================================================================================================================================
 Distributions from net realized gain     (.69)      (.05)     (1.59)     (1.78)  (2.87)   (.69)     (.03)     (1.57)    (1.62)
====================================================================================================================================
Net asset value, end of year            $19.55     $16.25     $14.27     $12.80  $11.49  $19.09    $15.98     $14.12    $12.75
====================================================================================================================================
Total Return(b)                          25.33%     14.24%     24.38%     28.35%  50.22%  24.55%    13.37%     23.48%    19.43%(c)
====================================================================================================================================
Ratios to Average Net Assets:
====================================================================================================================================
 Expenses                                 1.20%(e)    .98%(e)   1.06%      1.10%   1.03%   1.79%(e)  1.72%(e)   1.76%      .93%(c)
====================================================================================================================================
 Net investment loss                      (.64)%     (.46)%     (.72)%     (.67)%  (.52)% (1.24)%   (1.19)%    (1.39)%    (.73)%(c)
====================================================================================================================================
</TABLE>
<TABLE>


====================================================================================================================================
                                                           Class C Shares                               Class P Shares
------------------------------------------------------------------------------------------------------------------------------------
                                                       Year Ended January 31,                       Year Ended January 31,
Per Share Operating Performance:           2000           1999          1998      1997(d)     2000         1999          1998(d)

<S>                                       <C>            <C>            <C>       <C>         <C>         <C>           <C>
Net asset value, beginning of year        $16.00         $14.13         $12.75    12.14       $16.19      $14.26        $14.38
====================================================================================================================================
Income (loss) from investment operations
====================================================================================================================================
 Net investment loss                        (.21)(a)       (.17)(a)       (.19)(a) (.05)        (.12)(a)    (.10)(a)      (.01)(a)
====================================================================================================================================
 Net realized and unrealized
====================================================================================================================================
   gain (loss) on investments               4.01           2.07           3.14     2.28         4.08        2.08          (.11)
====================================================================================================================================
Total from investment operations            3.80           1.90           2.95     2.23         3.96        1.98          (.12)
====================================================================================================================================
Distributions
====================================================================================================================================
 Distributions from net realized gain       (.69)          (.03)         (1.57)   (1.62)        (.69)       (.05)          --
====================================================================================================================================
Net asset value, end of year              $19.11         $16.00         $14.13   $12.75       $19.46      $16.19        $14.26
====================================================================================================================================
Total Return(b)                            24.45%         13.43%         23.55%   19.43%(c)    25.24%      13.89%        (0.83)%(c)
====================================================================================================================================
Ratios to Average Net Assets:
====================================================================================================================================
 Expenses                                   1.79%(e)       1.72%(e)       1.71%     .93%(c)     1.25%(e)    1.17%(e)       .08%(c)
====================================================================================================================================
 Net investment loss                       (1.24)%        (1.20)%        (1.34)%   (.73)%(c)    (.70)%      (.70)%        (.05)%(c)
====================================================================================================================================
</TABLE>
<TABLE>
<CAPTION>

                                                                                  Year Ended January 31,
------------------------------------------------------------------------------------------------------------------------------------
Supplemental Data For All Classes:          2000                1999                 1998                1997                1996

<S>                     <C>              <C>                 <C>                   <C>                 <C>                 <C>
Net assets, end of year (000)            $2,912,681          $1,344,203            $553,086            $330,358            $197,602
====================================================================================================================================
Portfolio turnover rate                    50.13%              30.89%               33.60%              42.35%              50.12%
====================================================================================================================================
</TABLE>

(a)  Calculated using average shares outstanding during the period.

(b)  Total  return does not  consider the effects of sales loads and assumes the
     reinvestment of all distributions.

(c)  Not annualized.

(d)  Commencement of offering  respective  class shares: B - August 1, 1996, C -
     August 1, 1996 and P - January 5, 1998.

(e)  The  ratios  for 1999 and 2000  include  expenses  paid  through an expense
     offset arrangement.

                                                        Financial Information 15

<PAGE>

LINE GRAPH COMPARISON

      Immediately  below is a  comparison  of a  $10,000  investment  in Class A
      shares  to  the  same  investment  in the  Russell  2000  Index,  assuming
      reinvestment of all dividends and distributions.

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


[GRAPHIC OMITTED]

               NAV       MAX       Russel 2000
1/31/90        $10,000   $ 9,431   $10,000
1/31/91        $11,466   $10,813   $ 9,621
1/31/92        $16,226   $15,303   $13,929
1/31/93        $15,852   $14,951   $15,774
1/31/94        $18,454   $17,403   $18,706
1/31/95        $17,947   $16,926   $17,582
1/31/96        $26,961   $25,426   $22,847
1/31/97        $34,603   $32,634   $27,177
1/31/98        $43,043   $40,592   $32,088
1/31/99        $49,170   $46,371   $32,194
1/31/00        $61,623   $58,116   $37,905



================================================================================
                    Average Annual Total Return At Maximum Applicable
                  Sales Charge For The Periods Ending January 31, 2000


                      1 Year          5 Years          10 Years          Life
--------------------------------------------------------------------------------
Class A(3)           18.10%           26.48%            19.24%             -
--------------------------------------------------------------------------------
Class B(4)           19.55%              -                 -            22.80%
--------------------------------------------------------------------------------
Class C(5)           23.45%              -                 -            23.33%
--------------------------------------------------------------------------------
Class P(6)           25.24%              -                 -            11.08%
--------------------------------------------------------------------------------




(1)  Reflects the deduction of the maximum initial sales charge of 5.75%.

(2)  Performance  for  the  unmanaged   Russell  2000  Index  does  not  reflect
     transaction costs, management fees or sales charges.


(3)  Total return,  which is the percent change in value, after deduction of the
     maximum  initial sales charge of 5.75%  applicable to Class A shares,  with
     all dividends  and  distributions  reinvested  for the periods shown ending
     January  31, 2000 using the  SEC-required  uniform  method to compute  such
     return.


(4)  The Class B shares  commenced  operations  on August 1,  1996.  Performance
     reflects the deduction of a CDSC of 5% (for 1 year) and 3% (for life of the
     class).

(5)  The Class C shares  commenced  operations  on August 1,  1996.  Performance
     reflects the deduction of a CDSC of 1% (for 1 year) and 0% (for life of the
     class).

(6)  The Class P shares commenced operations on January 5, 1998.  Performance is
     at net asset value.

16 Financial Information

<PAGE>
COMPENSATION FOR YOUR DEALER
<TABLE>
<CAPTION>

====================================================================================================================================
                                                        FIRST YEAR COMPENSATION

                                     Front-end
                                     sales charge           Dealer's
                                     paid by investors      concession             Service fee(1)        Total compensation(2)
Class A investments                  (% of offering price)  (% of offering price)  (% of net investment) (% of offering price)
====================================================================================================================================
<S>       <C>                            <C>                     <C>                   <C>                    <C>
Less than $50,000                        5.75%                   5.00%                 0.25%                  5.24%
====================================================================================================================================
$50,000 - $99,999                        4.75%                   4.00%                 0.25%                  4.24%
====================================================================================================================================
$100,000 - $249,999                      3.95%                   3.25%                 0.25%                  3.49%
====================================================================================================================================
$250,000 - $499,999                      2.75%                   2.25%                 0.25%                  2.49%
====================================================================================================================================
$500,000 - $999,999                      1.95%                   1.75%                 0.25%                  1.99%
====================================================================================================================================
$1 million or more(3) or Retirement Plan - 100 or more eligible  employees(3) or
Special Retirement Wrap Program(3)
====================================================================================================================================
First $5 million                 no front-end sales charge       1.00%                 0.25%                  1.25%
====================================================================================================================================
Next $5 million above that       no front-end sales charge       0.55%                 0.25%                  0.80%
====================================================================================================================================
Next $40 million above that      no front-end sales charge       0.50%                 0.25%                  0.75%
====================================================================================================================================
Over $50 million                 no front-end sales charge       0.25%                 0.25%                  0.50%
====================================================================================================================================
Class B investments(4)                                            Paid at time of sale (% of net asset value)
====================================================================================================================================
All amounts                      no front-end sales charge       3.75%                 0.25%                  4.00%
====================================================================================================================================
Class C investments(4)
====================================================================================================================================
All amounts                      no front-end sales charge       0.75%                 0.25%                  1.00%
====================================================================================================================================
Class P investments                                               Percentage of average net assets
====================================================================================================================================
All amounts                      no front-end sales charge       0.25%                 0.20%                  0.45%

====================================================================================================================================
</TABLE>
<TABLE>

                                                 ANNUAL COMPENSATION AFTER FIRST YEAR

Class A investments                                               Percentage of average net assets(5)
====================================================================================================================================
<S>                             <C>                              <C>                   <C>                    <C>
All amounts                      no front-end sales charge       none                  0.25%                  0.25%
====================================================================================================================================
Class B investments(4)
====================================================================================================================================
All amounts                      no front-end sales charge       none                  0.25%                  0.25%
====================================================================================================================================
Class C investments(4)
====================================================================================================================================
All amounts                      no front-end sales charge       0.75%                 0.25%                  1.00%
====================================================================================================================================
Class P investments
====================================================================================================================================
All amounts                      no front-end sales charge       0.25%                 0.20%                  0.45%
====================================================================================================================================
</TABLE>

(1)  The  service  fee for  Class A and P shares  is paid  quarterly.  The first
     year's service fee on Class B and C shares is paid at the time of sale.

(2)  Dealer's concession  percentages and service fee percentages are calculated
     from  different  amounts,  and therefore  may not equal total  compensation
     percentages if combined using simple addition.  Additional  Concessions may
     be paid to Authorized Institutions, such as your dealer, from time to time.

(3)  Concessions  are paid at the time of sale on all Class A shares sold during
     any  12-month  period  starting  from the day of the first net asset  value
     sale.  With  respect to (a) Class A share  purchases at $1 million or more,
     sales  qualifying at such level under rights of accumulation  and statement
     of intention  privileges are included and (b) for Special  Retirement  Wrap
     Programs,  only new  sales are  eligible  and  exchanges  into the fund are
     excluded.


(4)  Class B and C are subject to CDSCs.


(5)  With  respect  to  Class  B,  C and  P  shares,  0.25%,  1.00%  and  0.45%,
     respectively,  of the  average  annual  net  asset  value  of  such  shares
     outstanding during the quarter (including distribution  reinvestment shares
     after  the  first  anniversary  of their  issuance)  is paid to  Authorized
     Institutions,  such as your  dealer.  These  fees  are  paid  quarterly  in
     arrears.

                                                        Financial Information 17
<PAGE>
     More information on the Fund is available free upon request,  including the
     following:

ANNUAL/SEMI-ANNUAL REPORT

     Describes the Fund, lists portfolio holdings and contains a letter from the
     Fund's  manager   discussing   recent  market  conditions  and  the  Fund's
     investment strategies.

STATEMENT OF ADDITIONAL INFORMATION ("SAI")

     Provides more details about the Fund and its policies.  A current SAI is on
     file  with  the   Securities  and  Exchange   Commission   ("SEC")  and  is
     incorporated by reference (is legally considered part of this prospectus).


To obtain information:

By telephone.  Call the Fund at:
800-426-1130


By mail.  Write to the Fund at:
The Lord Abbett Family of Funds
90 Hudson Street
Jersey City, NJ 07302-3973


Via the Internet.
Lord, Abbett & Co.
www.lordabbett.com

Text only versions of Fund
documents can be viewed
online or downloaded from:
SEC
www.sec.gov


You can also obtain copies by
visiting the SEC's Public Reference Room in Washington, DC (phone
202-942-8090) or by sending your request and a duplicating fee to
the SEC's Public Reference Section, Washington, DC 20549-6009 or by sending your
request electronically to [email protected].


     Lord Abbett Developing Growth Fund, Inc.


     90 Hudson Street                                           LADG-1-600
     Jersey City, NJ 07302-3973                                 (6/00)
--------------------------------------------------------------------------------
     SEC file number: 811-2871

<PAGE>



LORD ABBETT
--------------------------------------------------------------------------------
Statement of Additional Information                                 June 1, 2000
--------------------------------------------------------------------------------

                                   Lord Abbett
                          Developing Growth Fund, Inc.
--------------------------------------------------------------------------------


This Statement of Additional  Information is not a Prospectus.  A Prospectus may
be obtained  from your  securities  dealer or from Lord Abbett  Distributor  LLC
("Lord Abbett Distributor") located at 90 Hudson Street, Jersey City, New Jersey
07302-3973.  This Statement  relates to, and should be read in conjunction with,
the Prospectus dated June 1, 2000.


Shareholder  inquiries  should  be made by  writing  directly  to the Fund or by
calling  800-821-5129.  The Annual Report to Shareholders  is available  without
charge, upon request by calling that number. In addition, you can make inquiries
through your dealer.



         TABLE OF CONTENTS                                    Page

         1.       Investment Objective and Policies                     2
         2.       Directors and Officers                                6
         3.       Investment Advisory and Other Services               10
         4.       Portfolio Transactions                               10
         5.       Purchases, Redemptions and Shareholder Services      11
         6.       Past Performance                                     19
         7.       Taxes                                                20
         8.       Information About the Fund                           21
         9.       Financial Statements                                 21

                                       1
<PAGE>

Lord Abbett Developing Growth Fund, Inc.  (sometimes  referred to as "we" or the
"Fund") was incorporated under Maryland law on August 21, 1978, as a diversified
open-end management investment company,  registered under the Investment Company
Act of 1940,  as amended (the "Act").  The Fund's  predecessor  corporation  was
organized on July 11, 1973.


As of February 1, 2000,  shares of the Fund have not been available for purchase
by new investors other than through certain qualified retirement plans. Existing
shareholders may continue to invest in the Fund by adding to existing  accounts.
Qualified plans currently offering the Fund as an investment option may open new
participant  accounts.  However,  it is the Fund's  intention  not to accept any
purchase order for more than $5 million.


The Fund has 1,000,000,000 shares of authorized capital stock consisting of five
classes of shares (A, B, C, P, and Y). Only four classes of shares (A, B, C, and
P) are  offered  by this  Statement  of  Additional  Information.  The  Board of
Directors  will  allocate  these  authorized  shares of capital  stock among the
classes from time to time. All shares have equal noncumulative voting rights and
equal  rights with  respect to  dividends,  assets and  liquidation,  except for
certain  class-specific  expenses.  They are fully paid and  nonassessable  when
issued and have no preemptive or  conversion  rights.  Although no present plans
exist to do so,  further  classes may be added in the future.  The Act  requires
that where more than one class  exists,  each class must be  preferred  over all
other classes in respect of assets specifically allocated to such class.


                                       1.
                        Investment Objective and Policies


Fundamental  Investment  Restrictions.  The  Fund is  subject  to the  following
investment  restrictions  which cannot be changed without approval of a majority
of the Fund's outstanding shareholders.


The Fund may not:

     (1)  borrow  money,  except  that (i) the Fund may  borrow  from  banks (as
          defined  in the  Act) in  amounts  up to 33 1/3% of its  total  assets
          (including  the  amount  borrowed),  (ii) the Fund may borrow up to an
          additional  5% of its total assets for temporary  purposes,  (iii) the
          Fund may obtain such  short-term  credit as may be  necessary  for the
          clearance of purchases and sales of portfolio  securities and (iv) the
          Fund may  purchase  securities  on margin to the extent  permitted  by
          applicable law);

     (2)  pledge its assets  (other  than to secure such  borrowings,  or to the
          extent permitted by the Fund's  investment  policies,  as permitted by
          applicable law;

     (3)  engage in the underwriting of securities,  except pursuant to a merger
          or  acquisition  or  to  the  extent  that,  in  connection  with  the
          disposition  of its  portfolio  securities,  it may be deemed to be an
          underwriter under federal securities laws;

     (4)  make loans to other  persons,  except that the  acquisition  of bonds,
          debentures  or other  corporate  debt  securities  and  investment  in
          government obligations,  commercial paper,  pass-through  instruments,
          certificates of deposit, bankers acceptances, repurchase agreements or
          any similar  instruments  shall not be subject to this  limitation and
          except  further  that the Fund  may  lend  its  portfolio  securities,
          provided that the lending of portfolio  securities may be made only in
          accordance with applicable law;

     (5)  buy or sell real estate (except that the Fund may invest in securities
          directly or indirectly  secured by real estate or interests therein or
          issued by companies which invest in real estate or interests  therein)
          commodities or commodity  contracts (except to the extent the Fund may
          do so in accordance with  applicable law and without  registering as a
          commodity  pool  operator  under the  Commodity  Exchange  Act as, for
          example, with futures contracts);

     (6)  with respect to 75% of the gross assets of the Fund, buy securities of
          one issuer  representing  more than (i) 5% of the Fund's gross assets,
          except  securities  issued or guaranteed by the U.S.  Government,  its
          agencies or  instrumentalities or (ii) 10% of the voting securities of
          such issuer;



                                       2
<PAGE>

     (7)  invest  more than 25% of its  assets,  taken at market  value,  in the
          securities of issuers in any particular industry (excluding securities
          of the U.S. Government, its agencies and instrumentalities); or

     (8)  issue senior  securities  to the extent such  issuance  would  violate
          applicable law.

Compliance  with the investment  restrictions in this Section will be determined
at the time of purchase or sale of the portfolio investment.

Non-Fundamental  Investment  Restrictions.   In  addition  to  policies  in  the
Prospectus and the investment restrictions above which cannot be changed without
shareholder approval, the Fund is also subject to the following  non-fundamental
investment  policies  which may be  changed  by the Board of  Directors  without
shareholder approval.

The Fund may not:

     (1)  borrow in excess of 33 1/3% of its total assets  (including the amount
          borrowed),  and then only as a temporary  measure for extraordinary or
          emergency purposes;

     (2)  make short sales of securities or maintain a short position  except to
          the extent permitted by applicable law;

     (3)  invest  knowingly  more  than  15% of its net  assets  (at the time of
          investment) in illiquid securities,  except for securities  qualifying
          for resale under Rule 144A of the Securities Act of 1933, deemed to be
          liquid by the Board of Directors;

     (4)  invest in securities of other  investment  companies as defined in the
          Act, except as permitted by applicable law;

     (5)  invest in securities of issuers which, with their predecessors, have a
          record of less than three years of continuous operation,  if more than
          5% of the Fund's  total  assets  would be invested in such  securities
          (this  restriction  shall  not  apply to  mortgage-backed  securities,
          asset-backed  securities or obligations issued or guaranteed by the U.
          S. Government, its agencies or instrumentalities);

     (6)  hold  securities  of  any  issuer  when  more  than  1/2  of 1% of the
          securities of such issuer are owned beneficially by one or more of the
          Fund's  officers or directors or by one or more partners of the Fund's
          underwriter or investment adviser if these owners in the aggregate own
          beneficially more than 5% of such securities of such issuer;

     (7)  invest in warrants if, at the time of  acquisition,  its investment in
          warrants,  valued at the lower of cost or market,  would  exceed 5% of
          the Fund's total assets (included  within such limitation,  but not to
          exceed 2% of the  Fund's  total  assets,  are  warrants  which are not
          listed on the New York or American  Stock  Exchange or a major foreign
          exchange);

     (8)  invest in real estate  limited  partnership  interests or interests in
          oil,  gas or other  mineral  leases,  or  exploration  or  development
          programs,  except  that the Fund may  invest in  securities  issued by
          companies  that engage in oil,  gas or other  mineral  exploration  or
          development activities;

     (9)  write,   purchase  or  sell  puts,   calls,   straddles,   spreads  or
          combinations  thereof,  except to the extent  permitted  in the Fund's
          Prospectus  and  Statement of Additional  Information,  as they may be
          amended from time to time; or

     (10) buy from or sell to any of its officers, directors,  employees, or its
          investment  adviser or any of its  officers,  directors,  partners  or
          employees,  any  securities  other than  shares of the  Fund's  common
          stock.



Portfolio  Turnover  Rate.  For the fiscal  year ended  January  31,  2000,  our
portfolio turnover rate was 50.13% versus 30.89% for the prior fiscal year.




                                       3
<PAGE>


INVESTMENT TECHNIQUES

The  Fund  intends  to use,  from  time to time,  one or more of the  investment
techniques described below,  including lending portfolio securities,  repurchase
agreements,  warrants and covered call options.  While some of these  techniques
involve  risk when used  independently,  the Fund  intends to use them to reduce
risk and volatility in its portfolio.


Futures and Options. Although it has no current intention to do so, the Fund may
invest in financial futures and options on financial futures.

Lending of Portfolio  Securities.  Although the Fund has no current intention of
doing so, it may seek to earn  income by  lending  portfolio  securities.  Under
present regulatory  policies,  such loans may be made to member firms of the New
York Stock  Exchange  ("NYSE")  and are required to be secured  continuously  by
collateral consisting of cash, cash equivalents, or United States Treasury bills
maintained  in an amount at least  equal to the market  value of the  securities
loaned.  The Fund will have the right to call a loan and obtain  the  securities
loaned at any time upon five days'  notice.  During the  existence  of a loan we
will receive the income earned on investment of collateral.  The aggregate value
of the  securities  loaned will not exceed 30% of the value of the Fund's  gross
assets.

Repurchase  Agreements.  The Fund may  enter  into  repurchase  agreements  with
respect to a security. A repurchase agreement is a transaction by which the Fund
acquires a security and  simultaneously  commits to resell that  security to the
seller (a bank or securities  dealer) at an agreed-upon  price on an agreed-upon
date. The resale price  reflects the purchase  price plus an agreed-upon  market
rate of interest  which is  unrelated  to the coupon rate or date of maturity of
the purchased security. In this type of transaction, the securities purchased by
the Fund have a total value in excess of the value of the repurchase  agreement.
The Fund requires at all times that the repurchase  agreement be  collateralized
by cash or U.S. Government  securities having a value equal to, or in excess of,
the value of the repurchase  agreement.  Such agreements permit the Fund to keep
all of its assets at work while retaining  flexibility in pursuit of investments
of a longer term nature.

The use of repurchase  agreements  involves certain risks.  For example,  if the
seller of the agreement  defaults on its obligation to repurchase the underlying
securities at a time when the value of these  securities has declined,  the Fund
may incur a loss  upon  disposition  of them.  If the  seller  of the  agreement
becomes  insolvent  and  subject  to  liquidation  or  reorganization  under the
Bankruptcy  Code or other  laws,  a  bankruptcy  court  may  determine  that the
underlying  securities are collateral not within the control of the Fund and are
therefore  subject  to  sale by the  trustee  in  bankruptcy.  Even  though  the
repurchase  agreements may have  maturities of seven days or less, they may lack
liquidity, especially if the issuer encounters financial difficulties. While the
investment  adviser  acknowledges  these risks,  it is expected that they can be
controlled   through  stringent   selection   criteria  and  careful  monitoring
procedures.  The investment  manager intends to limit  repurchase  agreements to
transactions with dealers and financial  institutions believed by the investment
manager to present  minimal credit risks.  The  investment  manager will monitor
creditworthiness of the repurchase agreement sellers on an ongoing basis.


Stock Index Futures  Contracts.  The Fund believes it can reduce the  volatility
inherent in its portfolio through the use of stock index futures  contracts.  (A
stock  index  futures  contract  is an  agreement  pursuant to which two parties
agree,  one to receive and the other to pay,  on a  specified  date an amount of
cash equal to a specified  dollar amount --  established by an exchange or board
of trade -- times the difference  between the value of the index at the close of
the last trading day of the contract and the price at which the futures contract
is  originally  written.  No  consideration  is paid or received at the time the
contract is entered into,  only the good faith deposit  described  herein.) When
Lord Abbett, our investment manager, anticipates a general decline in the sector
of the stock market which includes our portfolio  assets,  we can reduce risk by
hedging  the effect of such  decline on our ability to sell assets at best price
or otherwise  hedge a decision to delay the sale of portfolio  securities.  Such
hedging would be possible if there were an established,  regularly-quoted  stock
index for equities of the  character in which we invest and if an active  public
market  were to  develop  on a stock  exchange  or board  of  trade  in  futures
contracts based on such index.

The market  value of a futures  contract is based  primarily on the value of the
underlying  index.  Changes  in  the  value  of the  index  will  cause  roughly
corresponding  changes in the market  price of the futures  contract,  except as
otherwise  described below. If a stock index is established  which is made up of
securities   whose   market   characteristics   closely   parallel   the  market
characteristics  of the securities in our portfolio,  then the market value of a
futures contract on that index should fluctuate in a way closely  resembling the
market fluctuation of our portfolio.  Thus, if we should sell futures contracts,
a decline in the market value of the portfolio  will be offset by an increase in
the value of the short  futures  position to the extent of the hedge (i.e.,  the
percentage  of the  portfolio  value  represented  by the  value of the


                                       4
<PAGE>

futures  position).  Conversely,  when we are in a  strong  cash  position  (for
example, through substantial sales of our shares) and wish to invest the cash in
anticipation  of a rising  market,  we could  rapidly hedge against the expected
market increase by buying futures contracts to offset the cash position and thus
cushion the adverse  effect of  attempting  to buy  individual  securities  in a
rising market.

The public  markets for existing  stock index futures  contracts,  such as those
using the  Standard  & Poor's  100 Index  and 500  Index  traded on the  Chicago
Mercantile  Exchange or those using the New York Stock Exchange  Composite Index
traded on the NYSE, are active and have developed  substantial  liquidity and we
expect a similar  market to develop for stock index futures on a  representative
group of over-the-counter stocks. The existence of an active market would permit
us to close out our  position in futures  contracts by  purchasing  an equal and
opposite  position in the public market.  Under futures  contracts  currently in
use, the purchaser  would be required to segregate in a separate  account,  as a
good faith deposit,  cash or Treasury bills in an amount set by a board of trade
or exchange (currently  approximately 5% of the contract value). Each day during
the  contract  period we would  either pay or receive an amount of cash equal to
the daily  change in the total value of the  contracts.  The amount which we may
segregate  upon entering into a futures  contract may not exceed,  together with
the amounts on deposit under all outstanding  contracts,  5% of the value of our
total  assets,  nor may we enter  into  additional  futures  contracts  if, as a
result,  the aggregate  amount  committed  under all our open futures  contracts
would exceed more than one-third of the value of such assets.

There are several  risks in  connection  with the use of futures  contracts as a
hedging device. One risk is the imperfect correlation between the composition of
our portfolio  securities  and the applicable  stock index.  If the value of the
futures  contract moves more than the value of the stock being hedged,  we would
experience  either a loss or a gain on the futures  contract  which would not be
completely  offset by  movements  in the value of the  securities  which are the
subject of the hedge.  Another risk is that the value of futures  contracts  may
not correlate  perfectly  with movement in the stock index due to certain market
distortions. Although we will enter into futures contracts strictly to hedge our
portfolio or cash positions,  other investors use these investment  vehicles for
other, sometimes more speculative, purposes. At times, excess speculation in the
futures market can distort the normal market  relationship  between the price of
the futures  contract and the value of the index.  If we decide to enter into or
close out our futures position during a period of such excess  speculation,  the
hedging strategy will be more or less successful, depending on the direction and
amount  of  this  distortion,  than  otherwise  would  be the  case.  Due to the
possibility  of price  distortion  in the  futures  market  and  because  of the
imperfect  correlation between movements in the stock index and movements in the
price of stock index futures  contracts,  a correct  forecast of general  market
trends by Lord Abbett may still not result in a successful hedging transaction.

It is possible  that,  when we sell  futures  contracts  to hedge our  portfolio
against a decline in the market, the market, as measured by the stock index, may
advance while the value of securities held in our portfolio may decline. If this
occurs,  we will lose  money on the  futures  contracts  and also  experience  a
decline in value in our portfolio securities. However, Lord Abbett believes that
over time the  value of a  diversified  portfolio  will tend to move in the same
direction as the market index upon which the futures contracts are based.

Where futures  contracts  are purchased to hedge against a possible  increase in
the price of stock before we are able to invest our cash position in stock in an
orderly fashion, it is possible that the market may decline instead and we would
realize a loss; if we then decide not to invest in stock at that time because of
concern as to possible  further market  decline or for other  reasons,  we would
realize a loss on the futures  contract that would be offset,  to the extent the
cash position had not been invested in stocks being hedged.

Positions in futures contracts may be closed out only on an exchange or board of
trade which provides a market for such contracts. Although we intend to purchase
or sell  futures  contracts  only  if an  active  market  has  developed  and is
continuing,  there is no assurance  that a liquid market on an exchange or board
of trade will exist for any particular  contract or at any  particular  time. In
such event, it may not be possible to close out a futures  position,  and in the
event of adverse price movements, we would continue to be required to make daily
cash payments marking our position to market.  However,  since futures contracts
would have been used to hedge portfolio securities and such securities would not
be sold until the  futures  contracts  had been  terminated,  an increase in the
price of the  securities,  if any, may partially or completely  offset losses on
the futures contract.

We may incur  additional  brokerage  commissions  through  entering into futures
contracts,  although we also can save on  commissions  by hedging  through  such
contracts  rather  than  through  buying or  selling  individual  securities  in
anticipation  of market moves.  Successful  use by us of futures  contracts will
depend upon Lord Abbett's  ability to predict


                                       5
<PAGE>

movements  in the  direction of the  over-the-counter  market  generally,  which
requires  different skills and techniques than predicting  changes in the prices
of individual stocks.

To date,  we have not  entered  into any futures  contracts  and have no present
intent to do so. An  established,  regularly-quoted  stock index for equities of
the character in which we invest has not yet been established.  If such an index
is established and we actually use futures contracts,  we will disclose such use
in our Prospectus.


Segregated  Account.  To the extent  required to comply with the  Securities and
Exchange Commission Release 10666 and any related SEC policies,  when purchasing
a futures  contract,  or  writing a put  option,  the Fund  will  maintain  in a
segregated  account  at its  custodian  bank  cash,  U.S.  Government  and other
permitted securities to cover its position.



                                       2.
                             Directors and Officers

The Fund's Board of Directors is responsible  for the management of the business
and affairs of the Fund.


The following  director is a partner of Lord,  Abbett & Co. ("Lord Abbett"),  90
Hudson Street,  Jersey City, New Jersey 07302-3973.  He has been associated with
Lord Abbett for over five years and is also an officer,  director, or trustee of
thirteen other Lord Abbett-sponsored funds.



*Robert S. Dow, age 55, Chairman and President


Mr. Dow is an "interested person" as defined in the Act.

The following outside directors are also directors or trustees of thirteen other
Lord Abbett-sponsored funds referred to above.


E. Thayer Bigelow, Director
245 Park Avenue, Suite 2414
New York, New York

Senior Adviser,  Time Warner Inc.  Formerly,  Acting Chief Executive  Officer of
Courtroom  Television  Network  (1997 - 1998).  Formerly,  President  and  Chief
Executive Officer of Time Warner Cable Programming, Inc. (1991 - 1997). Prior to
that, President and Chief Operating Officer of Home Box Office, Inc. Age 58.


William H.T. Bush, Director
Bush-O'Donnell & Co., Inc.
101 South Hanley Road, Suite 1025
St. Louis, Missouri


Co-founder   and   Chairman  of  the  Board  of  financial   advisory   firm  of
Bush-O'Donnell & Company. Age 61.


Robert B. Calhoun, Jr., Director
Monitor Clipper Partners
650 Madison Avenue, 9th Floor
New York, New York


Managing  Director of Monitor Clipper Partners (since 1997) and President of The
Clipper Group L.P., both private equity investment funds (since 1990). Age 57.


Stewart S. Dixon, Director
Wildman, Harrold, Allen & Dixon
225 W. Wacker Drive (Suite 2800)
Chicago, Illinois


Partner in the law firm of Wildman, Harrold, Allen & Dixon (since 1990). Age 69.



                                       6
<PAGE>

John C. Jansing, Director
162 S. Beach Road
Hobe Sound, Florida

Retired. Former Chairman of Independent Election Corporation of America, a proxy
tabulating firm. Age 74.


C. Alan MacDonald, Director
415 Round Hill Road
Greenwich, Connecticut

Currently involved in golf development  management on a consultancy basis (since
1999). Formerly, Managing Director of The Directorship Group Inc., a consultancy
in board management and corporate governance (1997-1999). Prior to that, General
Partner of The Marketing Partnership,  Inc., a full service marketing consulting
firm (1994-1997). Prior to that, Chairman and Chief Executive Officer of Lincoln
Snacks, Inc., manufacturer of branded snack foods (1992-1994).  His career spans
36  years at  Stouffers  and  Nestle  with 18 of the  years  as Chief  Executive
Officer.  Currently  serves as  Director of  DenAmerica  Corp.,  J. B.  Williams
Company, Inc., Fountainhead Water Company and Exigent Diagnostics. Age 66.


Hansel B. Millican, Jr., Director
Rochester Button Company
1328 Broadway (Suite 816)
New York, New York


President and Chief Executive  Officer of Rochester Button Company (since 1991).
Currently serves as Director of Polyvision. Age 71.


Thomas J. Neff, Director
Spencer Stuart
277 Park Avenue
New York, New York


Chairman of Spencer  Stuart,  an executive  search  consulting  firm.  Currently
serves as a Director of Ace, Ltd. (NYSE). Age 62.



                                       7
<PAGE>


The second column of the following table sets forth the compensation  accrued by
the Fund for outside  Directors.  The third column sets forth  information  with
respect  to  the   pension   or   retirement   benefits   accrued  by  all  Lord
Abbett-sponsored  funds for outside  directors/trustees.  The fourth column sets
forth  the total  compensation  paid by all Lord  Abbett-sponsored  funds to the
outside  directors/trustees,  and amounts  payable but deferred at the option of
the  director/trustee,  but does not  include  amounts  accrued  under the third
column.  No  director/trustee  of the funds  associated  with Lord Abbett and no
officer of the funds  received any  compensation  from the funds for acting as a
director/trustee or officer.
<TABLE>
<CAPTION>

                   For the Fiscal Year Ended January 31, 2000
                   ------------------------------------------
         (1)               (2)                       (3)                        (4)

                                                     Pension or                 For Year Ended
                                                     Retirement Benefits        December 31, 1999
                                                     Accrued by the             Total Compensation
                           Aggregate                 Company and                Paid by the Company and
                           Compensation              Thirteen Other Lord        Thirteen Other Lord
                           Accrued by                Abbett-sponsored           Abbett-sponsored
   Name of Director        the Fund/1                Funds/2                    Funds/3

<S>                        <C>                       <C>                        <C>
   E. Thayer Bigelow       $2,468                    $17,622                    $57,720
   William H.T. Bush       $1,183                    $15,846                    $58,000
   Robert B. Calhoun, Jr.  $1,441                    $12,276                    $57,000
   Stewart S. Dixon        $2,430                    $32,420                    $58,500
   John C. Jansing         $2,387                    $41,108/4                  $57,250
   C. Alan MacDonald       $2,365                    $26,763                    $57,500
   Hansel B. Millican, Jr. $2,387                    $37,822                    $57,500
   Thomas J. Neff          $2,430                    $20,313                    $59,660

</TABLE>

1.   Outside  directors'/trustees' fees, including attendance fees for board and
     committee  meetings,  are allocated among all Lord  Abbett-sponsored  funds
     based on the net assets of each fund.  A portion of the fees payable by the
     Fund to its outside  directors/trustees  may be deferred at the option of a
     director/trustee  under  a plan  that  deems  the  deferred  amounts  to be
     invested   in   shares  of  the  Fund  for   later   distribution   to  the
     directors/trustees.


     The amounts of the aggregate compensation payable by the Fund as of January
     31, 2000 deemed invested in company shares,  including dividends reinvested
     and changes in net asset value applicable to such deemed investments, were:
     Mr. Bigelow;  $12,023.16; Mr. Bush, $1,889.34; Mr. Calhoun,  $8,019.18; Mr.
     Dixon, $49,520.97; Mr. Jansing, $101,353.28; Mr. MacDonald, $38,072.36; Mr.
     Millican,  $113,095.78;  and Mr. Neff,  $109,216.11.  If the amounts deemed
     invested in Fund shares were added to each  director's  actual  holdings of
     Fund shares as of January 31,  2000,  each would own,  the  following:  Mr.
     Bigelow,  $52,880.40;  Mr. Bush,  $1,889.34;  Mr. Calhoun,  $8,019.18;  Mr.
     Dixon, $69,780.77; Mr. Jansing, $101,353.28; Mr. MacDonald, $38,072.36; Mr.
     Millican, $154,033.72; and Mr. Neff, $191,784.48.

2.   The amounts in Column 3 were accrued by the Lord Abbett-sponsored funds for
     the 12 months ended October 31, 1999.

3.   The    fourth    column    shows    aggregate    compensation,    including
     directors'/trustees'  fees and  attendance  fees for  board  and  committee
     meetings,  of a nature  referred  to in footnote  one,  accrued by the Lord
     Abbett-sponsored  funds during the year ended December 31, 1999,  including
     fees  directors/trustees have chosen to defer, but does not include amounts
     accrued under the equity-based plans and shown in Column 3.

4.   The equity-based plans superseded a previously approved retirement plan for
     all  directors/trustees.  Directors had the option to convert their accrued
     benefits  under  the  retirement  plan.  All of the  then  current  outside
     directors/trustees  except one made such  election.  Mr.  Jansing  chose to
     continue to receive  benefits under the retirement plan which provides that
     outside  directors  (trustees) may receive annual  retirement  benefits for
     life equal to their final annual retainer following  retirement at or after
     age 72 with at least ten years of service.  Thus,  if Mr.  Jansing  were to
     retire and the annual retainer  payable by the funds were the same as it is
     today, he would receive annual retirement benefits of $50,000.


                                       8
<PAGE>


Except where indicated,  the following  executive officers of the Fund have been
associated  with Lord  Abbett for over five  years.  Of the  following,  Messrs.
Carper,  Hilstad,  McGruder,  and Morris are partners of Lord Abbett; the others
are employees:


Executive Vice Presidents:
Stephen J. McGruder, age 56


Vice Presidents:


Joan Binstock,  age 46 (with Lord Abbett since 1999,  formerly  Chief  Operating
Officer of Morgan Grenfell from 1996 to 1999, prior thereto Principal of Ernst &
Young LLP)

Daniel E. Carper, age 48

Lesley-Jane Dixon, age 36

Paul A.  Hilstad,  age 57 (with Lord  Abbett  since 1995;  formerly  Senior Vice
President and General Counsel of American Capital Management & Research, Inc.)

Cinda C. Hughes, age 37 (with Lord Abbett since 1998, formerly Analyst/Director,
Equity Research at Phoenix  Investment  Counsel from 1996 to 1998, prior thereto
Associate Strategist - Small-Cap Stocks at PaineWebber,  Inc./Kidder,  Peabody &
Co., Inc.)




Lawrence  H.  Kaplan,  age 43 (with  Lord  Abbett  since  1997 -  formerly  Vice
President and Chief Counsel of Salomon Brothers Asset Management, Inc. from 1995
to 1997,  prior thereto Senior Vice  President,  Director and General Counsel of
Kidder Peabody Asset Management, Inc.)

Robert G. Morris, age 55

A. Edward Oberhaus III, age 40

Tracie E. Richter,  age 32 (with Lord Abbett since 1999, formerly Vice President
- Head of Fund  Administration  of  Morgan  Grenfell  from  1998 to  1999,  Vice
President of Bankers  Trust from 1996 to 1998,  prior  thereto Tax  Associate of
Goldman Sachs)


Treasurer:
Donna M.  McManus,  age 39,  (with Lord  Abbett  since  1996,  formerly a Senior
Manager at Deloitte & Touche LLP).


The Fund's By-Laws provide that the Fund shall not hold an annual meeting of its
stockholders  in any year unless one or more matters are required to be acted on
by  stockholders  under the Act or unless  called by a majority  of the Board of
Directors  or by  stockholders  holding at least one quarter of the stock of the
Fund  outstanding  and  entitled  to vote at the  meeting.  When any such annual
meeting is held, the stockholders  will elect directors and vote on the approval
of the independent auditors of the Fund.


As of May 11, 2000, our officers and directors,  as a group,  owned less than 1%
of our outstanding  shares.  As of May 11, 2000, there were no record holders of
5% or more of the Fund's outstanding shares.



                                       9
<PAGE>


                                       3.
                     Investment Advisory and Other Services


As described under  "Management"  in the  Prospectus,  Lord Abbett is the Fund's
investment  manager.  Of the general partners of Lord Abbett,  the following are
officers and/or directors of the Fund: Daniel E. Carper,  Robert S. Dow, Paul A.
Hilstad,  Stephen J. McGruder,  and Robert G. Morris. The other general partners
are: Stephen I. Allen, Zane E. Brown, John E. Erard,  Robert P. Fetch,  Daria L.
Foster,  Robert I. Gerber,  W. Thomas Hudson,  Michael B. McLaughlin,  Robert J.
Noelke, R. Mark Pennington,  Christopher J. Towle and John J. Walsh. The address
of each partner is 90 Hudson Street, Jersey City, New Jersey 07302-3973.


The services  performed by Lord Abbett are described  under  "Management" in the
Prospectus.  Under the Management Agreement, the Fund pays Lord Abbett a monthly
fee, based on average daily net assets for each month, at the annual rate of .75
of 1% of the portion of our net assets not in excess of $100,000,000  and .50 of
1% of such assets over  $100,000,000.  This fee is allocated among Class A, B, C
and P shares based on the classes'  proportionate  shares of such average  daily
net assets. In addition, the Fund is obligated to pay all expenses not expressly
assumed by Lord Abbett, including,  without limitation,  12b-1 expenses, outside
directors' fees and expenses,  association  membership  dues, legal and auditing
fees, taxes, transfer and dividend disbursing agent fees,  shareholder servicing
costs,  expenses  relating  to  shareholder  meetings,  expenses  of  preparing,
printing and mailing stock  certificates  and shareholder  reports,  expenses of
registering  our shares under  federal and state  securities  laws,  expenses of
preparing, printing and mailing prospectuses to existing shareholders, insurance
premiums,  brokerage  and other  expenses  connected  with  executing  portfolio
transactions.


For the fiscal years ended January 31, 2000, 1999, and 1998, the management fees
paid to  Lord  Abbett  amounted  to  $10,423,188;  $4,444,605,  and  $2,325,894,
respectively.

Lord  Abbett  Distributor  LLC,  a New York  limited  liability  company,  and a
subsidiary  of Lord Abbett,  90 Hudson  Street,  Jersey City,  New Jersey 07302,
serves as the principal underwriter for the Fund.


Deloitte & Touche LLP, Two World Financial Center, New York, New York 10281, are
the  independent  auditors of the Fund and must be approved at least annually by
our Board of Directors to continue in such capacity. They perform audit services
for the Fund including the examination of financial  statements  included in our
Annual Report to Shareholders.

The Bank of New York ("BNY"),  48 Wall Street,  New York, New York 10286, is the
Fund's  custodian.  In accordance with the  requirements of Rule 17f-5 under the
Act, the Fund's  directors  have  approved  arrangements  permitting  the Fund's
foreign  assets not held by BNY or its  foreign  branches  to be held by certain
qualified foreign banks and depositories.


United Missouri Bank of Kansas City, N.A. Tenth and Grand, Kansas City, Missouri
64142, acts as the transfer agent and dividend disbursing agent for the Fund.



                                       4.
                             Portfolio Transactions

The Fund's policy is to obtain best execution on all our portfolio transactions,
which means that we seek to have  purchases  and sales of  portfolio  securities
executed at the most favorable prices, considering all costs of the transaction,
including brokerage commissions and dealer markups and markdowns and taking into
account the full range and quality of the  brokers'  services.  Consistent  with
obtaining  best  execution,  the Fund  may pay,  as  described  below,  a higher
commission than some brokers might charge on the same  transactions.  Our policy
with respect to best  execution  governs the selection of brokers or dealers and
the market in which the transaction is executed. To the extent permitted by law,
we may, if considered advantageous, make a purchase from or sale to another Lord
Abbett-sponsored fund without the intervention of any broker-dealer.

Broker-dealers  are selected on the basis of their  professional  capability and
the value and quality of their brokerage and research  services.  Normally,  the
selection is made by traders who are officers of the Fund and also are employees
of Lord  Abbett.  These  traders do the  trading as well for other  accounts  --
investment  companies  (of which they are also  officers)  and other  investment
clients -- managed by Lord  Abbett.  They are  responsible  for  obtaining  best
execution.

                                       10
<PAGE>

We pay a  commission  rate  that we  believe  is  appropriate  to  give  maximum
assurance  that our brokers  will provide us, on a  continuing  basis,  with the
highest level of brokerage services  available.  While we do not always seek the
lowest possible commissions on particular trades, we believe that our commission
rates are in line with the rates that many other  institutions  pay. Our traders
are  authorized  to pay  brokerage  commissions  in excess of those  that  other
brokers might accept on the same transactions in recognition of the value of the
services  performed  by the  executing  brokers,  viewed in terms of either  the
particular  transaction  or the  overall  responsibilities  of Lord  Abbett with
respect to us and the other accounts they manage.  Such services include showing
us trading  opportunities  including  blocks,  a willingness and ability to take
positions in  securities,  knowledge of a particular  security or market  proven
ability to handle a particular type of trade, confidential treatment, promptness
and reliability.

Some of these brokers also provide research  services at least some of which are
useful to Lord Abbett in their overall  responsibilities  with respect to us and
the other accounts they manage. Research includes the furnishing of analyses and
reports concerning issuers, industries, securities, economic factors and trends,
portfolio  strategy and the  performance  of accounts and trading  equipment and
computer software  packages,  acquired from third-party  suppliers,  that enable
Lord Abbett to access various  information  bases.  Such services may be used by
Lord Abbett in servicing all their  accounts,  and not all of such services will
necessarily  be used by Lord Abbett in connection  with their  management of the
Fund; conversely,  such services furnished in connection with brokerage on other
accounts  managed by Lord Abbett may be used in connection with their management
of the  Fund,  and not all of such  services  will  necessarily  be used by Lord
Abbett in connection  with their advisory  services to such other  accounts.  We
have been advised by Lord Abbett that  research  services  received from brokers
cannot be allocated to any  particular  account,  are not a substitute  for Lord
Abbett's  services but are  supplemental  to their own research  effort and when
utilized,  are subject to internal  analysis  before being  incorporated by Lord
Abbett into their investment  process.  As a practical  matter,  it would not be
possible for Lord Abbett to generate all of the information  presently  provided
by brokers.  While  receipt of research  services from  brokerage  firms has not
reduced Lord Abbett's  normal research  activities,  the expenses of Lord Abbett
could be  materially  increased  if it  attempted  to generate  such  additional
information  through its own staff and  purchased  such  equipment  and software
packages directly from the suppliers.

No commitments  are made  regarding the  allocation of brokerage  business to or
among brokers, and trades are executed only when they are dictated by investment
decisions of the Fund to purchase or sell portfolio securities.

If two or more  broker-dealers are considered capable of offering the equivalent
likelihood of best execution,  the  broker-dealer who has sold our shares and/or
shares of other Lord Abbett-sponsored funds may be preferred.

If other  clients of Lord Abbett buy or sell the same  security at the same time
as we do, transactions will, to the extent  practicable,  be allocated among all
participating  accounts  in  proportion  to the amount of each order and will be
executed  daily until filled so that each account  shares the average  price and
commission  cost of each day.  Other  clients  who direct  that their  brokerage
business be placed with  specific  brokers or who invest  through wrap  accounts
introduced to Lord Abbett by certain brokers may not participate  with us in the
buying and selling of the same  securities as described  above. If these clients
wish to buy or sell the same security as we do, they may have their transactions
executed at times different from our  transactions  and thus may not receive the
same price or incur the same commission cost as we do.


During the fiscal years ended  January 31, 2000,  1999,  and 1998, we paid total
commissions to independent  dealers of $1,632,845,  $1,187,227,  and $1,930,696,
respectively.



                                       5.
                             Purchases, Redemptions
                            and Shareholder Services


Information  concerning  how we value our shares for the purchase and redemption
of  our  shares  is  contained  in  the   Prospectus   under   "Purchases"   and
"Redemptions," respectively.

As disclosed in the Prospectus, we calculate our net asset value as of the close
of the NYSE on each day that the NYSE is open for trading by dividing  our total
net assets by the number of shares  outstanding at the time of calculation.  The
NYSE is closed on Saturdays and Sundays and the following holidays -- New Year's
Day, Martin Luther King, Jr. Day,  Presidents'  Day, Good Friday,  Memorial Day,
Independence Day, Labor Day, Thanksgiving and Christmas.



                                       11
<PAGE>

The Fund values its portfolio  securities at market value as of the close of the
NYSE. Market value will be determined as follows:  securities listed or admitted
to trading  privileges  on the New York or  American  Stock  Exchange  or on the
NASDAQ National  Market System are valued at the last sales price,  or, if there
is no sale on that day, at the mean between the last bid and asked  prices,  or,
in the case of bonds, in the over-the-counter  market if, in the judgment of the
Fund's  officers,  that market more accurately  reflects the market value of the
bonds.  Over-the-counter  securities  not traded on the NASDAQ  National  Market
System are valued at the mean between the last bid and asked prices.  Securities
for which market  quotations  are not  available are valued at fair market value
under procedures approved by the Board of Directors.

For each class of shares the net asset  value will be  determined  by taking the
net asset value and dividing by the shares outstanding.


The  maximum  offering  price of our  Class A shares  on  January  31,  2000 was
computed as follows:

                                                              Class A
                                                              -------
Net asset value per share (net assets divided
by shares outstanding)                                        $19.55

Maximum offering price per share (net asset
value divided by .9425)                                       $20.74


The net asset value per share for the Class B, C and P shares is  determined  in
the same  manner  as for the  Class A  shares  (net  assets  divided  by  shares
outstanding). Our Class B, C and P shares are sold at net asset value.

The Fund has entered into a distribution agreement with Lord Abbett Distributor,
under which Lord Abbett Distributor is obligated to use its best efforts to find
purchasers  for the shares of the Fund, and to make  reasonable  efforts to sell
Fund shares so long as, in Lord Abbett  Distributor's  judgment,  a  substantial
distribution can be obtained by reasonable efforts.

For  the  last  three  fiscal  years,  Lord  Abbett,  as  the  Fund's  principal
underwriter,  received net commissions after allowance of a portion of the sales
charge to independent dealers with respect to Class A shares as follows:


                                      Year Ended January 31
                                      ---------------------

                                2000         1999        1998
                             ---------    ---------   ----------
Gross sales charge          $4,829,217   $5,690,775   $3,195,724

Amount allowed to dealers   $4,173,297   $4,920,536   $2,768,167
                            ----------   ----------   ----------

Net commissions
received by Lord Abbett     $  644,920   $  770,239   $  427,557
                            ==========   ==========   ==========


Conversion  of Class B Shares.  The  conversion  of Class B shares on the eighth
anniversary  of their purchase is subject to the  continuing  availability  of a
private  letter  ruling  from the  Internal  Revenue  Service,  or an opinion of
counsel or tax adviser, to the effect that the conversion of Class B shares does
not  constitute a taxable event for the holder under Federal  income tax law. If
such  a  revenue  ruling  or  opinion  is no  longer  available,  the  automatic
conversion  feature may be suspended,  in which event no further  conversions of
Class B shares would occur while such  suspension  remained in effect.  Although
Class B shares  could  then be  exchanged  for  Class A shares  on the  basis of
relative net asset value of the two classes,  without the  imposition of a sales
charge or fee, such exchange could constitute a taxable event for the holder.

ALTERNATIVE SALES ARRANGEMENTS

Classes of Shares. The Fund offers investors four different classes of shares in
this  Statement  of  Additional  Information.  The  different  classes of shares
represent  investments  in the same  portfolio of securities  but are subject to
different expenses and will likely have different share prices. Investors should
read this  section  carefully  to  determine  which  class  represents  the best
investment option for their particular situation.



                                       12
<PAGE>

Class A Shares.  If you buy Class A shares,  you pay an  initial  sales  charge,
unless your purchase meets one of the following conditions: (i) your purchase is
for $1  million  or more in one or more Lord  Abbett-sponsored  funds;  (ii) you
purchase  through an  employer-sponsored  retirement plan (a "Retirement  Plan")
with at least 100  eligible  employees  under the  Internal  Revenue Code (which
excludes  Individual  Retirement  Accounts):  or (iii)  you  purchase  through a
"special  retirement  program"  which is a certain type program  sponsored by an
institution or other entity  permitted to receive  service  and/or  distribution
fees under a Rule 12b-1 Plan (an  "Authorized  Institution").  The program  must
also have one or more characteristics  distinquishing it, in the opinion of Lord
Abbett Distributor,  from a Mutual Fund Fee Based Program.  Such characteristics
include,  among other things,  the fact that an Authorized  Institution does not
charge  its  clients  any  fee  of a  consulting  or  advisory  nature  that  is
economically equivalent to the distribution fee under the Class A 12b-1 Plan and
the fact that the  program  relates to  participant-directed  Retirement  Plans.
However,  if you meet a condition  which  allows you to purchase  Class A shares
without an initial  sales  charge,  but you redeem any of those shares within 24
months after the month in which you buy them,  you may pay the Fund a contingent
deferred  sales  charge  ("CDSC") of 1%.  There is an  exception to the CDSC for
redemptions under a special retirement wrap program.  Class A shares are subject
to service and distribution fees that are currently  estimated at an annual rate
of .35 of 1% of the average  net asset value of the Class A shares.  The initial
sales charge rates,  the CDSC and the Rule 12b-1 plan  applicable to the Class A
shares are described in the sections below.

Class B Shares.  If you buy Class B shares,  you pay no sales charge at the time
of  purchase,  but if you redeem your  shares  before the sixth  anniversary  of
buying them, you will normally pay a CDSC to Lord Abbett Distributor.  That CDSC
varies  depending  on how long you own  shares.  Class B shares  are  subject to
service  and  distribution  fees at an annual rate of 1% of the annual net asset
value of the Class B shares.  The CDSC and the Rule 12b-1 plan applicable to the
Class B shares are described in the sections below.

Class C Shares.  If you buy Class C shares,  you pay no sales charge at the time
of  purchase,  but if you redeem your  shares  before the first  anniversary  of
buying  them,  you will  normally  pay the Fund a CDSC of 1%. Class C shares are
subject to service and distribution  fees at an annual rate of 1% of the average
net  asset  value of the  Class C  shares.  The CDSC  and the  Rule  12b-1  plan
applicable to the C shares are described in the sections below.

Class P Shares.  If you buy Class P shares,  you pay no sales charge at the time
of purchase,  and if you redeem your shares you pay no CDSC.  Class P shares are
subject to service and  distribution  fees at an annual rate of .45 of 1% of the
average  daily  net  asset  value of the Class P  shares.  The Rule  12b-1  plan
applicable  to the Class P shares is described in the  sections  below.  Class P
shares are available to a limited number of investors.

Which  Class of Shares  Should You  Choose?  Once you decide that the Fund is an
appropriate  investment  for you,  the  decision  as to which class of shares is
better  suited to your needs  depends  on a number of  factors  which you should
discuss with your financial adviser. The Fund's class-specific  expenses and the
effect of the different  types of sales charges on your  investment  will affect
your investment  results over time. The most important  factors are how much you
plan to invest and how long you plan to hold your investment.  If your goals and
objectives  change over time and you plan to  purchase  additional  shares,  you
should  re-evaluate those factors to see if you should consider another class of
shares.

In the following discussion, to help provide you and your financial adviser with
a framework in which to choose a class,  we have made some  assumptions  using a
hypothetical  investment  in the Fund. We used the sales charge rates that apply
to Class  A,  Class B and  Class C, and  considered  the  effect  of the  higher
distribution  fees on Class B and  Class C  expenses  (which  will  affect  your
investment  return). Of course, the actual performance of your investment cannot
be predicted and will vary, based on the Fund's actual investment  returns,  the
operating  expenses  borne by each class of shares,  and the class of shares you
purchase.  The factors briefly discussed below are not intended to be investment
advice,  guidelines  or  recommendations,   because  each  investor's  financial
considerations are different. The discussion below of the factors to consider in
purchasing a particular  class of shares assumes that you will purchase only one
class of shares and not a combination of shares of different classes.

How Long Do You Expect to Hold Your  Investment?  While future  financial  needs
cannot be  predicted  with  certainty,  knowing how long you expect to hold your
investment  will assist you in selecting the  appropriate  class of shares.  For
example,  over time, the reduced sales charges available for larger purchases of
Class A shares may offset the effect of paying an initial  sales  charge on your
investment,  compared to the effect over time of higher class-specific  expenses
on Class B or Class C shares for which no initial sales charge is paid.  Because
of the effect of  class-based  expenses,  your choice  should also depend on how
much you plan to invest.



                                       13
<PAGE>

Investing for the Short Term. If you have a short-term  investment horizon (that
is,  you plan to hold your  shares  for not more  than six  years),  you  should
probably  consider  purchasing  Class A or Class C shares  rather  than  Class B
shares.  This is because of the effect of the Class B CDSC if you redeem  before
the sixth  anniversary  of your  purchase,  as well as the effect of the Class B
distribution  fee on the  investment  return for that  class in the short  term.
Class C shares might be the  appropriate  choice  (especially for investments of
less than $100,000), because there is no initial sales charge on Class C shares,
and the CDSC does not apply to amounts you redeem after holding them one year.

However,  if you plan to invest more than $100,000 for the short term,  then the
more you invest and the more your investment horizon increases toward six years,
the more  attractive  the Class A share  option may become.  This is because the
annual  distribution  fee on Class C shares  will have a greater  impact on your
account over the longer term than the reduced  front-end sales charge  available
for  larger  purchases  of Class A shares.  For  example,  Class A might be more
appropriate  than Class C for  investments of more than $100,000  expected to be
held for 5 or 6 years (or more).  For investments  over $250,000  expected to be
held 4 to 6 years (or more),  Class A shares may become  more  appropriate  than
Class  C. If you are  investing  $500,000  or  more,  Class  A may  become  more
desirable as your investment horizon approaches three years or more.

For most investors who invest $1 million or more or for Retirement Plans with at
least 100 eligible employees or for investments pursuant to a special retirement
wrap program, in most cases Class A shares will be the most advantageous choice,
no matter how long you intend to hold your shares.  For that reason,  it may not
be suitable for you to place a purchase  order for Class B shares of $500,000 or
more or a purchase  order for Class C shares of $1,000,000 or more. In addition,
it may not be  suitable  for you to place an order for Class B or C shares for a
Retirement Plan with at least 100 eligible employees or for a special retirement
wrap program. You should discuss this with your financial adviser.

Investing  for the Longer Term.  If you are  investing  for the longer term (for
example,  to provide  for future  college  expenses  for your  child) and do not
expect to need access to your money for seven years or more,  Class B shares may
be an appropriate  investment  option, if you plan to invest less than $100,000.
If you plan to invest more than $100,000 over the long term, Class A shares will
likely be more  advantageous than Class B shares or Class C shares, as discussed
above,  because of the effect of the expected  lower expenses for Class A shares
and the reduced initial sales charges available for larger  investments in Class
A shares under the Fund's Rights of Accumulation.

Of course,  these examples are based on  approximations of the effect of current
sales charges and expenses on a  hypothetical  investment  over time, and should
not be relied on as rigid guidelines.

Are There  Differences  in Account  Features  That Matter to You?  Some  account
features  are  available  in whole or in part to  Class A,  Class B and  Class C
shareholders.  Other features (such as Systematic Withdrawal Plans) might not be
advisable in non-Retirement  Plan accounts for Class B shareholders  (because of
the effect of the CDSC on the entire  amount of a  withdrawal  if it exceeds 12%
annually) and in any account for Class C  shareholders  during the first year of
share  ownership  (due  to the  CDSC  on  withdrawals  during  that  year).  See
"Systematic  Withdrawal  Plan"  under  "Services  For  Fund  Investors"  in  the
Prospectus  for more  information  about the 12% annual waiver of the CDSC.  You
should  carefully  review  how you plan to use your  investment  account  before
deciding  which class of shares you buy. For example,  the dividends  payable to
Class B and Class C shareholders will be reduced by the expenses borne solely by
each of these classes,  such as the higher distribution fee to which Class B and
Class C shares are subject, as described below.

How Does It Affect Payments to My Broker?  A salesperson,  such as a broker,  or
any other person who is entitled to receive compensation for selling Fund shares
may  receive  different  compensation  for  selling  one class than for  selling
another class. As discussed in more detail below, such compensation is primarily
paid at the time of sale in the case of  Class A and B shares  and is paid  over
time, so long as shares remain outstanding, in the case of Class C shares. It is
important that investors understand that the primary purpose of the CDSC for the
Class B shares  and the  distribution  fee for Class B and Class C shares is the
same as the purpose of the front-end sales charge on sales of Class A shares: to
compensate  brokers and other persons selling such shares. The CDSC, if payable,
supplements  the Class B  distribution  fee and reduces the Class C distribution
fee expenses for the Fund and Class C shareholders.


                                       14
<PAGE>

Rule 12b-1 Plans


Classes A, B, C, and P. As described in the  Prospectus,  the Fund has adopted a
Distribution  Plan and Agreement  pursuant to Rule 12b-1 of the Act for the four
Fund  Classes:  the "A  Plan,"  the "B Plan,"  the "C  Plan,"  and the "P Plan,"
respectively.  In adopting each Plan and in approving its continuance, the Board
of Directors has concluded that there is a reasonable  likelihood that each Plan
will benefit its  respective  Class and such Class'  shareholders.  The expected
benefits  include  greater sales and lower  redemptions  of Class shares,  which
should allow each Class to maintain a consistent cash flow, and a higher quality
of service to  shareholders by authorized  institutions  than would otherwise be
the case. Lord Abbett uses all amounts  received under each Plan as described in
the Prospectus and for payments to dealers for (i) providing continuous services
to the  shareholders,  such  as  answering  shareholder  inquiries,  maintaining
records, and assisting shareholders in making redemptions, transfers, additional
purchases and exchanges and (ii) their assistance in distributing  shares of the
Fund.



During the last fiscal year ended  January 31,  2000,  the Fund  accrued or paid
through  Lord  Abbett  to  authorized   institutions   $5,032,147,   $2,726,166,
$2,140,046, and $415,712, under the A, B, C and P Plans, respectively.


Each Plan  requires  the Board of  Directors  to review,  on a quarterly  basis,
written  reports of all amounts  expended  pursuant to the Plan and the purposes
for which such  expenditures  were made. Each Plan shall continue in effect only
if its  continuance  is  specifically  approved at least annually by vote of the
directors,  including a majority of the directors who are not interested persons
of the  Fund  and who have no  direct  or  indirect  financial  interest  in the
operation  of the  Plan  or in any  agreements  related  to the  Plan  ("outside
directors"), cast in person at a meeting called for the purpose of voting on the
Plan. No Plan may be amended to increase  materially  above the limits set forth
therein the amount spent for distribution  expenses  thereunder without approval
by a majority of the outstanding  voting  securities of the applicable class and
the approval of a majority of the directors, including a majority of the outside
directors.  Each Plan may be terminated at any time by vote of a majority of the
outside  directors  or by vote of a  majority  of its class  outstanding  voting
securities.

Contingent  Deferred Sales Charges. A Contingent  Deferred Sales Charge ("CDSC")
applies upon early  redemption of shares  regardless  of class,  and (i) will be
assessed  on the  lesser  of the net  asset  value of the  shares at the time of
redemption  or the original  purchase  price and (ii) will not be imposed on the
amount of your account value represented by the increase in net asset value over
the initial  purchase  price  (including  increases due to the  reinvestment  of
dividends and capital gains  distributions) and upon early redemption of shares.
In the case of Class A shares,  this increase is represented by shares having an
aggregate  dollar  value in your  account.  In the case of Class B and C shares,
this increase is represented by that percentage of each share redeemed where the
net asset value exceeded the initial purchase price.

Class A Shares.  As  stated  in the  Prospectus,  a CDSC of 1% is  imposed  with
respect  to  those   Class  A  shares  (or  Class  A  shares  of  another   Lord
Abbett-sponsored  fund  acquired  through  exchange of such shares) on which the
Fund has paid the  one-time  distribution  fee of 1% if such shares are redeemed
out of the Lord  Abbett-sponsored  family of funds  within a period of 24 months
from the end of the month in which the original sale occurred.

Class B  Shares.  As  stated in the  Prospectus,  if Class B shares  (or Class B
shares of another Lord  Abbett-sponsored  fund acquired through exchange of such
shares) are redeemed out of the Lord  Abbett-sponsored  family of funds for cash
before the sixth anniversary of their purchase, a CDSC will be deducted from the
redemption  proceeds.  The Class B CDSC is paid to Lord  Abbett  Distributor  to
reimburse its expenses, in whole or in part, for providing  distribution-related
services to the Fund in connection with the sale of Class B shares.

To determine  whether the CDSC applies to a redemption,  the Fund redeems shares
in the following  order:  (1) shares  acquired by  reinvestment of dividends and
capital gains  distributions,  (2) shares held on or after the sixth anniversary
of  their  purchase,   and  (3)  shares  held  the  longest  before  such  sixth
anniversary.

The amount of the CDSC will depend on the number of years since you invested and
the dollar amount being redeemed, according to the following schedule:


                                       15
<PAGE>

<TABLE>
<CAPTION>

Anniversary of the Day on                            Contingent Deferred Sales Charge
Which the Purchase Order Was Accepted                on Redemptions (As % of Amount Subject to Charge)
<S>                                                  <C>
Before the 1st                                       5.0%
On the 1st, before the 2nd                           4.0%
On the 2nd, before the 3rd                           3.0%
On the 3rd, before the 4th                           3.0%
On the 4th, before the 5th                           2.0%
On the 5th, before the 6th                           1.0%
On or after the 6th anniversary                      None
</TABLE>

In the table, an  "anniversary" is the same calendar day in each respective year
after the date of purchase.  All purchases  are  considered to have been made on
the business day on which the purchase order was accepted.

Class C Shares. As stated in the Prospectus,  subject to certain exceptions,  if
Class C shares  are  redeemed  for cash  before the first  anniversary  of their
purchase,  the  redeeming  shareholder  will be  required  to pay to the Fund on
behalf of Class C shares a CDSC of 1% of the lower of cost or the then net asset
value of Class C shares  redeemed.  If such shares are  exchanged  into the same
class of another Lord Abbett-sponsored fund and subsequently redeemed before the
first  anniversary of their original  purchase,  the charge will be collected by
the other fund on behalf of this Fund's Class C shares.

General.  The  percentage (1% in the case of Class A and C shares and 5% through
1% in the case of Class B shares) used to calculate  CDSCs  described  above for
the Class A, Class B and Class C shares is sometimes  hereinafter referred to as
the "Applicable Percentage."

With respect to Class A and Class B shares, no CDSC is payable on redemptions by
participants or beneficiaries from employer-sponsored retirement plans under the
Internal  Revenue  Code  for  benefit  payments  due  to  plan  loans,  hardship
withdrawals,  death,  retirement or  separation  from service and for returns of
excess contributions to retirement plan sponsors. With respect to Class A shares
purchased pursuant to a special  retirement wrap program,  no CDSC is payable on
redemptions  which continue as investments in another fund  participating in the
program.  With respect to Class B shares, no CDSC is payable for redemptions (i)
in connection with Systematic Withdrawal Plan and Div-Move services as described
below under those headings, (ii) in connection with mandatory distribution under
403(b) plans and IRAs and (iii) in connection with death of the shareholder.  In
the case of Class A and Class C shares,  the CDSC is received by the Fund and is
intended  to  reimburse  all or a portion of the amount  paid by the Fund if the
shares are  redeemed  before  the Fund has had an  opportunity  to  realize  the
anticipated  benefits of having a long-term  shareholder account in the Fund. In
the case of Class B shares,  the CDSC is received by Lord Abbett Distributor and
is intended to reimburse its expenses of providing  distribution-related service
to the Fund (including recoupment of the commission payments made) in connection
with the  sale of  Class B shares  before  Lord  Abbett  Distributor  has had an
opportunity to realize its anticipated  reimbursement by having such a long-term
shareholder account subject to the B Plan distribution fee.

The other funds which  participate in the Telephone  Exchange  Privilege (except
(a) Lord Abbett U.S.  Government  Securities Money Market Fund, Inc.  ("GSMMF"),
(b) certain funds of Lord Abbett  Tax-Free  Income Fund and Lord Abbett Tax-Free
Income  Trust  for which a Rule  12b-1  Plan is not yet in  effect,  and (c) any
authorized  institution's  affiliated  money market fund  satisfying Lord Abbett
Distributor  as to  certain  omnibus  account  and other  criteria,  hereinafter
referred to as an "authorized  money market fund" or "AMMF"  (collectively,  the
"Non-12b-1  Funds")) have instituted a CDSC for each class on the same terms and
conditions.  No CDSC will be charged on an  exchange of shares of the same class
between  Lord Abbett funds or between such funds and AMMF.  Upon  redemption  of
shares out of the Lord Abbett  family of funds or out of AMMF,  the CDSC will be
charged on behalf of and paid:  (i) to the fund in which the  original  purchase
(subject to a CDSC) occurred,  in the case of the Class A and Class C shares and
(ii) to Lord Abbett  Distributor if the original purchase was subject to a CDSC,
in the case of the Class B shares.  Thus,  if shares of a Lord  Abbett  fund are
exchanged  for shares of the same  class of another  such fund and the shares of
the same class  tendered  ("Exchanged  Shares") are subject to a CDSC,  the CDSC
will carry over to the shares of the same class being acquired,  including GSMMF
and AMMF ("Acquired  Shares").  Any CDSC that is carried over to Acquired Shares
is calculated as if the holder of the Acquired Shares had held those shares from
the date on which he or she became the holder of the Exchanged Shares.  Although
the Non-12b-1  Funds will not pay a  distribution  fee on their own shares,  and
will, therefore, not impose their own CDSC, the Non-12b-1 Funds will collect the
CDSC (a) on behalf of other Lord  Abbett  funds,  in the case of the Class A and
Class C shares and (b) on behalf of Lord Abbett Distributor,  in the case of the
Class B shares.  Acquired  Shares  held in GSMMF and AMMF which are subject to a
CDSC will be  credited  with the time such shares are held in GSMMF but will not
be  credited  with the time such  shares  are held in AMMF.


                                       16
<PAGE>

Therefore, if your Acquired Shares held in AMMF qualified for no CDSC or a lower
Applicable  Percentage  at the  time of  exchange  into  AMMF,  that  Applicable
Percentage will apply to redemptions for cash from AMMF,  regardless of the time
you have held Acquired Shares in AMMF.

In no event will the amount of the CDSC exceed the Applicable  Percentage of the
lesser of (i) the net asset value of the shares  redeemed  or (ii) the  original
cost of such  shares (or of the  Exchanged  Shares for which  such  shares  were
acquired).  No CDSC  will be  imposed  when  the  investor  redeems  (i)  shares
representing an aggregate dollar amount of your account,  in the case of Class A
shares, (ii) that percentage of each share redeemed,  in the case of Class B and
Class C shares,  derived  from  increases  in the value of the shares  above the
total cost of shares being  redeemed due to increases in net asset value,  (iii)
shares  with  respect to which no Lord  Abbett fund paid a 12b-1 fee and, in the
case of Class B shares,  Lord Abbett Distributor paid no sales charge or service
fee (including  shares  acquired  through  reinvestment  of dividend  income and
capital  gains  distributions)  or (iv) shares which,  together  with  Exchanged
Shares,  have been held  continuously for 24 months from the end of the month in
which the original sale occurred (in the case of Class A shares);  for six years
or more (in the case of Class B shares) and for one year or more (in the case of
Class C  shares).  In  determining  whether a CDSC is  payable,  (a)  shares not
subject to the CDSC will be redeemed  before shares  subject to the CDSC and (b)
of the shares subject to a CDSC,  those held the longest will be the first to be
redeemed.

Exchanges.  The Prospectus briefly describes the Telephone  Exchange  Privilege.
You may  exchange  some or all of your shares of any class for those in the same
class of: (i) Lord Abbett-sponsored funds currently offered to the public with a
sales charge  (front-end,  back-end or level ), (ii) GSMMF or (iii) AMMF, to the
extent  offers  and  sales  may be made in  your  state.  You  should  read  the
prospectus of the other fund before exchanging. In establishing a new account by
exchange, shares of the Fund being exchanged must have a value equal to at least
the  minimum  initial  investment  required  for the other  fund into  which the
exchange is made.

Shareholders in other Lord  Abbett-sponsored  funds and AMMF have the same right
to  exchange  their  shares for the  corresponding  class of the Fund's  shares.
Exchanges  are based on relative  net asset values on the day  instructions  are
received by the Fund in Kansas City if the  instructions  are received  prior to
the close of the NYSE in proper form. No sales charges are imposed except in the
case of  exchanges  out of  GSMMF or AMMF  (unless  a sales  charge  (front-end,
back-end or level) was paid on the initial investment in a Lord Abbett-sponsored
fund).  Exercise of the exchange privilege will be treated as a sale for federal
income tax purposes, and, depending on the circumstances,  a gain or loss may be
recognized. In the case of an exchange of shares that have been held for 90 days
or less where no sales charge is payable on the  exchange,  the  original  sales
charge incurred with respect to the exchanged  shares will be taken into account
in  determining  gain or loss on the  exchange  only to the extent  such  charge
exceeds the sales charge that would have been payable on the acquired shares had
they been acquired for cash rather than by exchange. The portion of the original
sales charge not so taken into  account will  increase the basis of the acquired
shares.

Shareholders have the exchange  privilege unless they refuse it in writing.  You
should  not view the  exchange  privilege  as a means for  taking  advantage  of
short-term swings in the market,  and we reserve the right to terminate or limit
the privilege of any shareholder who makes frequent exchanges.  We can revoke or
modify the privilege for all shareholders upon 60 days' prior notice.  "Eligible
Funds" are AMMF and other Lord Abbett-sponsored funds which are eligible for the
exchange  privilege,  except Lord Abbett Series Fund  ("LASF")  which offers its
shares only in connection with certain variable annuity  contracts,  Lord Abbett
Equity Fund ("LAEF") which is not issuing  shares.  The exchange  privilege will
not be available  with respect to any otherwise  "Eligible  Funds" the shares of
which are not available to new investors of the type requesting the exchange.


Letter of Intention. Under the terms of the Letter of Intention, as described in
the Prospectus,  you may invest $50,000 or more over a 13-month period in shares
of a Lord  Abbett-sponsored  fund (other than  shares of LAEF,  LASF,  GSMMF and
AMMF,  unless holdings in GSMMF and AMMF are  attributable  to shares  exchanged
from a Lord  Abbett-sponsored  fund offered with a front-end,  back-end or level
sales charge). Shares currently owned by you are credited as purchases (at their
current  offering  prices on the date the Letter of Intention is signed)  toward
achieving  the stated  investment  and reduced  initial sales charge for Class A
shares.  Class A shares  valued at 5% of the amount of  intended  purchases  are
escrowed and may be redeemed to cover the additional sales charge payable if the
Letter is not completed. The Letter of Intention is neither a binding obligation
on you to buy, nor on the Fund to sell, the full amount indicated.


Rights of Accumulation.  As stated in the Prospectus,  purchasers (as defined in
the Prospectus) may accumulate their investment in Lord  Abbett-sponsored  funds
(other than LAEF,  LASF,  GSMMF,  and AMMF unless  holdings in GSMMF or AMMF are
attributable to shares exchanged from a Lord  Abbett-sponsored fund offered with
a front-end,  back-end


                                       17
<PAGE>

or level  sales  charge)  so that a  current  investment,  plus the  purchaser's
holdings  valued at the current maximum  offering price,  reach a level eligible
for a discounted sales charge for Class A shares.

Net Asset Value Purchases of Class A Shares.  As stated in the  Prospectus,  our
Class A shares may be purchased at net asset value by our  directors,  employees
of Lord Abbett,  employees of our  shareholder  servicing agent and employees of
any securities  dealer having a sales agreement with Lord Abbett who consents to
such   purchases  or  by  the  director  or  custodian   under  any  pension  or
profit-sharing plan or Payroll Deduction IRA established for the benefit of such
persons  or for the  benefit  of  employees  of any  national  securities  trade
organization  to which Lord Abbett  belongs or any company with an account(s) in
excess of $10  million  managed  by Lord  Abbett  on a  private-advisory-account
basis.  For purposes of this  paragraph,  the terms  "directors" and "employees"
include a director's or employee's  spouse  (including the surviving spouse of a
deceased director or employee). The terms "our directors" and "employees of Lord
Abbett" also include  retired  directors and employees and other family  members
thereof.

Our Class A shares also may be purchased at net asset value (a) at $1 million or
more,  (b) with  dividends and  distributions  from Class A shares of other Lord
Abbett-sponsored  funds, except for LAEF and LASF, (c) under the loan feature of
the Lord Abbett-sponsored prototype 403(b) plan for share purchases representing
the  repayment of principal  and interest,  (d) by certain  authorized  brokers,
dealers, registered investment advisers or other financial institutions who have
entered  into an  agreement  with Lord Abbett  Distributor  in  accordance  with
certain standards approved by Lord Abbett  Distributor,  providing  specifically
for the use of our shares in particular investment products made available for a
fee to clients of such  brokers,  dealers,  registered  investment  advisers and
other  financial  institutions,   ("mutual  fund  advisory  program"),   (e)  by
employees,  partners and owners of unaffiliated consultants and advisors to Lord
Abbett,  Lord Abbett Distributor or Lord  Abbett-sponsored  funds who consent to
such  purchase  if such  persons  provide  service to Lord  Abbett,  Lord Abbett
Distributor  or such  funds on a  continuing  basis and are  familiar  with such
funds, (f) through Retirement Plans with at least 100 eligible employees; (g) in
connection with a merger, acquisition or other reorganization; and (h) through a
"special retirement wrap program" sponsored by an authorized institution showing
one or more  characteristics  distinguishing  it, in the  opinion of Lord Abbett
Distributor from a mutual fund advisory program.  Such characteristics  include,
among other things, the fact that an authorized  institution does not charge its
clients  any  fee of a  consulting  or  advisory  nature  that  is  economically
equivalent  to the  distribution  fee under Class A 12b-1 Plan and the fact that
the  program  relates  to a  participant-directed  Retirement  Plan.  Shares are
offered at net asset  value to these  investors  for the  purpose  of  promoting
goodwill with employees and others with whom Lord Abbett  Distributor and/or the
Funds have business relationships.

Redemptions.  A  redemption  order is in proper form when it contains all of the
information and  documentation  required by the order form or  supplementally by
Lord Abbett Distributor or the Fund to carry out the order. The signature(s) and
any legal capacity of the signer(s) must be guaranteed by an Eligible Guarantor,
which is any broker or bank that is a member of the medallion stamp program. See
the Prospectus for expedited redemption procedures.

The right to redeem and receive payment, as described in the Prospectus,  may be
suspended if the NYSE is closed  (except for  weekends or  customary  holidays),
trading on the NYSE is  restricted  or the  Securities  and Exchange  Commission
deems an emergency to exist.

Our Board of  Directors  may  authorize  redemption  of all of the shares in any
account  in which  there are  fewer  than 25  shares.  Before  authorizing  such
redemption, the Board must determine that it is in our economic best interest or
is  necessary  to reduce  disproportionately  burdensome  expenses in  servicing
shareholder accounts. At least 30 days prior written notice will be given before
any such  redemption,  during which time  shareholders  may avoid  redemption by
bringing their accounts up to the minimum set by the Board.

Div-Move. Under the Div-Move service described in the Prospectus, you can invest
the dividends paid on your account of any class into an existing  account of the
same class in any other  Eligible Fund. The account must be either your account,
a joint account for you and your spouse, a single account for your spouse,  or a
custodial  account for your minor child under the age of 21. You should read the
prospectus of the other fund before investing.

Invest-A-Matic.  The  Invest-A-Matic  method of investing in the Fund and/or any
other  Eligible Fund is described in the  Prospectus.  To avail yourself of this
method you must complete the application form,  selecting the time and amount of
your bank checking account  withdrawals and the funds for investment,  include a
voided, unsigned check and complete the bank authorization.



                                       18
<PAGE>

Systematic  Withdrawal  Plans.  The Systematic  Withdrawal  Plan ("SWP") also is
described  in the  Prospectus.  You may  establish  a SWP if you own or purchase
uncertificated shares having a current offering price value of at least $10,000.
Lord Abbett prototype  retirement plans have no such minimum.  With respect to a
SWP for Class B shares,  the CDSC will be waived on redemptions of up to 12% per
year of the  current  net  asset  value of your  account  at the time the SWP is
established.  For Class B share  redemptions  over 12% per  year,  the CDSC will
apply  to  the  entire  redemption.  Therefore,  please  contact  the  Fund  for
assistance in  minimizing  the CDSC in this  situation.  With respect to Class C
shares,  the CDSC will be waived  on and  after the first  anniversary  of their
purchase.  The SWP involves the planned redemption of shares on a periodic basis
by receiving either fixed or variable amounts at periodic  intervals.  Since the
value of shares  redeemed may be more or less than their cost,  gain or loss may
be recognized for income tax purposes on each periodic  payment.  Normally,  you
may not make regular  investments at the same time you are receiving  systematic
withdrawal  payments because it is not in your interest to pay a sales charge on
new  investments  when in  effect  a  portion  of that  new  investment  is soon
withdrawn.  The minimum investment accepted while a withdrawal plan is in effect
is  $1,000.  The SWP may be  terminated  by you or by us at any time by  written
notice.

Retirement  Plans.  The Prospectus  indicates the types of retirement  plans for
which Lord Abbett provides forms and  explanations.  Lord Abbett makes available
the retirement  plan forms including  401(k) plans and custodial  agreements for
IRAs (Individual Retirement Accounts, including Traditional,  Education Roth and
SIMPLE  IRAs and  Simplified  Employee  Pensions),  403(b)  plans and  qualified
pension and  profit-sharing  plans.  The forms name  Investors  Fiduciary  Trust
Company as  custodian  except in the case of 401(k)  plans and contain  specific
information  about the  plans.  Explanations  of the  eligibility  requirements,
annual  custodial  fees and allowable tax advantages and penalties are set forth
in the relevant plan documents.  Adoption of any of these plans should be on the
advice of your legal counsel or qualified tax adviser.


                                       6.
                                Past Performance

The Fund computes the average  annual  compounded  rate of total return for each
class during specified  periods that would equate the initial amount invested to
the ending  redeemable  value of such  investment  by adding one to the computed
average  annual total return,  raising the sum to a power equal to the number of
years  covered by the  computation  and  multiplying  the result by one thousand
dollars,  which represents a hypothetical  initial  investment.  The calculation
assumes  deduction  of the  maximum  sales  charge  (as  described  in the  next
paragraph)  from the initial  amount  invested  and  reinvestment  of all income
dividends and capital gains distributions on the reinvestment dates at net asset
value.  The  ending  redeemable  value is  determined  by  assuming  a  complete
redemption  at the end of the  period(s)  covered by the  average  annual  total
return computation.

In  calculating  total  returns for Class A shares,  the current  maximum  sales
charge of 5.75% (as a  percentage  of the offering  price) is deducted  from the
initial  investment (unless the return is shown at net asset value). For Class B
shares,  the payment of the applicable CDSC (5.0% prior to the first anniversary
of purchase, 4.0% prior to the second anniversary of purchase, 3.0% prior to the
third and fourth anniversaries of purchase,  2.0% prior to the fifth anniversary
of purchase,  1.0% prior to the sixth anniversary of purchase and no CDSC on and
after the sixth  anniversary  of purchase)  is applied to the Fund's  investment
result for that class for the time  period  shown  (unless  the total  return is
shown at net asset value).  For Class C shares,  the 1.0% CDSC is applied to the
Fund's  investment  result for that class for the time period shown prior to the
first  anniversary  of purchase  (unless the total  return is shown at net asset
value).  Total  returns  also  assume  that  all  dividends  and  capital  gains
distributions during the period are reinvested at net asset value per share, and
that the investment is redeemed at the end of the period.


Using  the  computation  method  described  above,  the  Fund's  average  annual
compounded  rates of total return for the last one-,  five-, and ten-year period
ending  on  January  31,  2000  were as  follows:  18.10%,  26.48%  and  19.24%,
respectively  for the Fund's  Class A shares.  For Class B shares,  the  average
annual  compounded  rate of total return for the  one-year and  life-of-the-Fund
periods  ending on January 31, 2000 were  19.55% and 22.80%,  respectively.  For
Class C shares,  the  average  annual  compounded  rate of total  return for the
one-year and life-of-the-Fund periods ending on January 31, 2000 were 23.45% and
23.33%, respectively.  For Class P shares, the average annual compounded rate of
total return for the one-year period and life-of-the-Fund  periods ended January
31, 2000 were 25.24% and 11.08%, respectively.


These figures represent past  performance,  and an investor should be aware that
the investment return and principal value of a Fund investment will fluctuate so
that an investor's shares,  when redeemed,  may be worth more or less than their
original cost.  Therefore,  there is no assurance that this  performance will be
repeated in the future.



                                       19
<PAGE>


                                       7.
                                      Taxes

The Fund  intends to elect and to qualify  for special  tax  treatment  afforded
regulated  investment  companies  under the  Internal  Revenue Code of 1986 (the
"Code").  If it so  qualifies,  the  Fund  (but  not its  shareholders)  will be
relieved  of  federal  income  taxes on the  amount  it  timely  distributes  to
shareholders.  If in any  taxable  year the Fund does not qualify as a regulated
investment  company,  all of its  taxable  income  will be  taxed to the Fund at
regular corporate rates.

The  Fund  contemplates  declaring  as  dividends  substantially  all of its net
investment  income.  Dividends paid by the Fund from its  investment  income and
distributions out of short-term capital gains are taxable to its shareholders as
ordinary  income  from  dividends,  whether  received in cash or  reinvested  in
additional  shares  of the  Fund.  Distributions  paid  by the  Fund  of its net
realized  long-term  capital gains are taxable to shareholders as capital gains,
also whether  received in cash or reinvested  in shares.  The Fund will send its
shareholders  annual  information  concerning the tax treatment of dividends and
other distributions.

Upon a sale,  exchange or redemption  of shares of the Fund, a shareholder  will
recognize  short-  or  long-term  capital  gain  or  loss,  depending  upon  the
shareholder's  holding period in the Fund's shares.  However, if a shareholder's
holding  period in his shares is six month or less,  any capital  loss  realized
from a sale or exchange of such shares must be treated as long-term capital loss
to the extent of dividends classified as "capital gains dividends" received with
respect to such shares.  The maximum tax rates  applicable  to net capital gains
recognized by individuals and other non-corporate  taxpayers are (i) the same as
ordinary  income rates for capital assets held for one year or less and (ii) 20%
for  capital  assets  held  for more  than one  year.  Capital  gains or  losses
recognized by corporate  shareholders  are subject to tax at the ordinary income
tax rates applicable to corporations.

Losses on the sale of shares are not deductible if, within a period beginning 30
days  before the date of the sale and ending 30 days after the date of the sale,
the taxpayer acquires shares that are substantially identical.

Some  shareholders  may  be  subject  to a 31%  withholding  tax  on  reportable
dividends,   capital  gains   distributions  and  redemption  payments  ("backup
withholding").  Generally,  shareholders  subject to backup  withholding will be
those for whom a certified  taxpayer  identification  number is not on file with
the Fund or who, to the Fund's  knowledge,  have furnished an incorrect  number.
When  establishing  an account,  an investor  must  certify  under  penalties of
perjury that such number is correct and that he or she is not otherwise  subject
to backup withholding.

The writing of call options and other investment  techniques and practices which
the Fund may utilize may affect the character and timing of the  recognition  of
gains and  losses.  Such  transactions  may  increase  the amount of  short-term
capital  gain  realized  by the Fund,  which is taxed as  ordinary  income  when
distributed to shareholders.

The Fund may be subject to foreign  withholding  taxes,  which would  reduce the
yield on its investments.  It is generally  expected that Fund  shareholders who
are subject to United States  federal income tax will not be entitled to claim a
federal  income tax credit or  deduction  for foreign  income  taxes paid by the
Fund.

The Fund will be subject to a 4%  non-deductible  excise tax on certain  amounts
not  distributed  or treated as having been  distributed  on a timely basis each
calendar  year.  The Fund intends to  distribute  to  shareholders  each year an
amount adequate to avoid the imposition of such excise tax.

Dividends paid by the Fund will qualify for the dividends-received deduction for
corporations  to the extent they are  derived  from  dividends  paid by domestic
corporations. Corporate shareholders must have held their shares in the Fund for
more than 45 days to qualify for the deduction for dividends paid by the Fund.

Gain and loss realized by the Fund on certain  transactions,  including sales of
foreign debt securities and certain  transactions  involving  foreign  currency,
will be treated as ordinary  income or loss for federal  income tax  purposes to
the  extent,  if any,  that  such gain or loss is  attributable  to  changes  in
exchange rates for foreign  currencies.  Accordingly,  distributions  taxable as
ordinary  income will include the net amount,  if any, of such foreign  exchange
gain and will be reduced by the net  amount,  if any, of such  foreign  exchange
loss.

If the Fund  purchases  shares in certain  foreign  investment  entities  called
"passive foreign investment companies," the Fund may be subject to United States
federal  income tax on a portion of any "excess  distribution"  or gain from the



                                       20
<PAGE>


disposition  of such  shares,  even if such income is  distributed  as a taxable
dividend by the Fund to its  shareholders.  Additional  charges in the nature of
interest  may be imposed on the Fund in respect of deferred  taxes  arising from
such  distributions  or gains.  If the Fund were to make a  "qualified  electing
fund"  election with respect to its investment in a passive  foreign  investment
company,  in lieu of the foregoing  requirements,  the Fund might be required to
include in income each year a portion of the  ordinary  earnings and net capital
gains of the qualified  electing fund,  even if such amount were not distributed
to the Fund. Alternatively, if the Fund were to make a "mark-to-market" election
with respect to its investment in a passive foreign investment company,  gain or
loss with respect to the investment  would be considered  realized at the end of
each taxable year of the Fund even if the Fund continued to hold the investment,
and would be treated as ordinary income or loss to the Fund.

The  foregoing  discussion  relates  solely to U.S.  federal  income  tax law as
applicable to United States  persons  (United  States  citizens or residents and
United States  domestic  corporations,  partnerships,  trusts and estates.) Each
shareholder  who is not a United States  person  should  consult his tax adviser
regarding  the U.S. and foreign tax  consequences  of the ownership of shares of
the Fund,  including the applicable  rate of U.S.  withholding  tax on dividends
representing   ordinary  income  and  net  short-term  capital  gains,  and  the
applicability of U.S. gift and estate taxes.



                                       8.
                           Information About the Fund

The directors,  trustees and officers of Lord  Abbett-sponsored  funds, together
with the partners and  employees of Lord Abbett,  are  permitted to purchase and
sell securities for their personal investment accounts.  In engaging in personal
securities  transactions,  however, such persons are subject to requirements and
restrictions  contained  in  the  Fund's  Code  of  Ethics  which  complies,  in
substance,   with  each  of  the   recommendations  of  the  Investment  Company
Institute's  Advisory Group on Personal Investing.  Among other things, the Code
requires that Lord Abbett partners and employees  obtain advance approval before
buying or selling  securities,  submit  confirmations and quarterly  transaction
reports,  and obtain approval before becoming a director of any company;  and it
prohibits  such persons from  investing in a security 7 days before or after any
Lord Abbett-sponsored  fund or Lord Abbett-managed  account considers a trade or
trades in such security, from profiting on trades of the same security within 60
days, and from trading on material and non-public information.  The Code imposes
certain similar  requirements and restrictions on the independent  directors and
trustees of each Lord  Abbett-sponsored  fund to the extent  contemplated by the
recommendations of such Advisory Group.

Rule 18f-2 under the Act, provides that any matter required to be submitted,  by
the provisions of the Act or applicable  state law or otherwise,  to the holders
of the outstanding  voting securities of an investment  company such as the Fund
shall not be deemed to have been  effectively  acted upon unless approved by the
holders of a majority of the  outstanding  shares of each class affected by such
matter.  Rule 18f-2 further provides that a class shall be deemed to be affected
by a matter unless the  interests of each class in the matter are  substantially
identical or the matter does not affect any interest of such class. However, the
Rule exempts the selection of independent public accountants,  the approval of a
contract  with a principal  underwriter  and the election of directors  from its
separate voting requirements.


                                       9.
                              Financial Statements


The  financial  statements  for the fiscal  year ended  January 31, 2000 and the
report  of  Deloitte  & Touche  LLP,  independent  auditors,  on such  financial
statements  contained in the 2000 Annual Report to  Shareholders  of Lord Abbett
Developing  Growth  Fund,  Inc.  are  incorporated  herein by  reference to such
financial  statements  and report in reliance  upon the  authority of Deloitte &
Touche LLP as experts in auditing and accounting.



                                       21


<PAGE>


                                     PART C

                                OTHER INFORMATION

This  Post-Effective  Amendment  No. 33 (the  "Amendment")  to the  Registrant's
Registration  Statement relates only to the Developing Growth Fund's Class A, B,
C and P.

The other class of shares of the  Registrant  is listed  below and is offered by
the  Prospectus  and  Statement  of  Additional  Information  in  Parts A and B,
respectively,  of the Post-Effective Amendment to the Registrant's  Registration
Statement as  identified.  The  following  is a separate  class of shares of the
Registrant.  This  Amendment  does not relate to, amend or otherwise  affect the
Prospectus  and  Statement  of  Additional  Information  contained  in the prior
Post-Effective  Amendment  listed  below,  and pursuant to Rule 485(d) under the
Securities Act of 1933, does not affect the effectiveness of such Post-Effective
Amendment.

                                          POST-EFFECTIVE
                                          AMENDMENT NO.
                                          -------------
Class Y                                         32


Item 23    Exhibits

           (a)        Articles  of  Incorporation.  Incorporated  by  reference.
                      Restated  Articles  of   Incorporation.   Incorporated  by
                      reference  to  Post-effective  Amendment  No.  17  to  the
                      Registration  Statement  on Form  N-1A  filed on April 30,
                      1998.

           (b)        By-Laws.   Incorporated  by  reference  to  Post-Effective
                      Amendment  No. 28 to the  Registration  Statement  on Form
                      N-1A filed on March 1, 1999.

           (c)        Instruments    Defining   Rights   of   Security   Holders
                      incorporated by reference.

           (d)        Investment Advisory Contracts incorporated by reference.

           (e)        Underwriting Contracts incorporated by reference.

           (f)        Bonus or  Profit  Sharing  Contracts  is  incorporated  by
                      reference  to  Post  Effective  Amendment  No.  6  to  the
                      Registration  Statement  on Form N-1A  filed on October 7,
                      1994.

           (g)        Custodian Agreements incorporated by reference.

           (h)        Other Material Contracts incorporated by reference.

           (i)        Legal Opinion. Filed herein

           (j)        Other Opinion. Filed herein

           (k)        Omitted Financial Statements incorporated by reference.

           (l)        Initial Capital Agreements incorporated by reference.

           (m)        Rule  12b-1  Plan   incorporated   by  reference  to  Post
                      Effective Amendment No. 12 filed on August 29, 1996.

           (n)        Financial  Data  Schedule.  Incorporated  by  reference to
                      Registrant's  Form N-SAR filed  March 31, 2000  (Accession
                      No. 0000276914-00-000013).

           (o)        Rule  18f-3  Plan.   Incorporated  by  reference  to  Post
                      Effective Amendment No. 4 to the Registration Statement on
                      Form N-1A filed on May 14, 1996.

           (p)        Code of Ethics. Incorporated by reference to Post-
                      Effective Amendment No. 32 filed on April 28, 2000.



Item 24    Persons Controlled by or Under Common Control with the Fund


           None.


Item 25    Indemnification

           All Directors/Trustees,  officers, employees and agents of Registrant
           are to be  indemnified  as set forth in Section  4.3 of  Registrant's
           Declaration of Trust.


<PAGE>

           Insofar as indemnification for liability arising under the Securities
           Act of 1933 may be  permitted  to  Directors/Trustees,  officers  and
           controlling  persons  of the  Registrant  pursuant  to the  foregoing
           provisions, or otherwise, the Registrant has been advised that in the
           opinion   of   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 expense  incurred or paid by a  Director/Trustee,
           officer or  controlling  person of the  Registrant in the  successful
           defense  of any  action,  suit or  proceeding)  is  asserted  by such
           Director/Trustee,  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
           of 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.

           In  addition,   Registrant  maintains  a   Directors'/Trustees'   and
           officers' errors and omissions  liability insurance policy protecting
           Directors/Trustees and officers against liability for breach of duty,
           negligent  act,  error or  omission  committed  in their  capacity as
           Directors/Trustees   or  officers.   The  policy   contains   certain
           exclusions,  among which is  exclusion  from  coverage  for active or
           deliberate  dishonest or  fraudulent  acts and exclusion for fines or
           penalties imposed by law or other matters deemed uninsurable.

Item 26    Business and Other Connections of Investment Adviser

           Lord,  Abbett & Co.  acts as  investment  adviser  for  twelve  other
           investment companies and as investment adviser to approximately 8,300
           private  accounts  as of  December  31,  1999.  Other than  acting as
           trustees,  directors and/or officers of open-end investment companies
           managed by Lord,  Abbett & Co., none of Lord, Abbett & Co.'s partners
           has,  in the past two fiscal  years,  engaged in any other  business,
           profession,  vocation or employment  of a substantial  nature for his
           own  account  or in  the  capacity  of  director,  trustee,  officer,
           employee, or partner of any entity.



Item 27    Principal Underwriters

     (a)   Lord Abbett Bond-Debenture Fund, Inc.
           Mid-Cap Value Fund, Inc.
           Lord Abbett Tax-Free Income Fund, Inc.
           Lord Abbett Global Fund, Inc.
           Lord Abbett Series Fund, Inc.
           Lord Abbett U.S. Government Money Market Fund, Inc.
           Lord Abbett Equity Fund
           Lord Abbett Tax-Free Income Trust
           Lord Abbett Affiliated Fund, Inc.
           Lord Abbett Investment Trust
           Lord Abbett Research Fund, Inc.
           Lord Abbett Securities Trust

     (b)   The partners of Lord, Abbett & Co. are:

           Name and Principal               Positions and Offices
           Business Address (1)             with Registrant
           --------------------             ---------------

           Robert S. Dow                    Chairman and President
           Paul A. Hilstad                  Vice President & Secretary
           Stephen J. McGruder              Executive Vice President
           Daniel E. Carper                 Vice President
           Robert G. Morris                 Vice President
           John J. Walsh                    Vice President


<PAGE>

           The other  general  partners  of Lord  Abbett & Co.  who are  neither
           officers nor directors of the Registrant  are Stephen I. Allen,  Zane
           E. Brown, John E. Erard, Robert P. Fetch, Daria L. Foster,  Robert I.
           Gerber,  W.  Thomas  Hudson,  Jr.,  Stephen I.  McGruder,  Michael B.
           McLaughlin,  Robert J. Noelke, R. Mark Pennington, and Christopher J.
           Towle.


           Each of the above has a principal business address:
           90 Hudson Street, Jersey City, New Jersey -07302

     (c)   Not applicable


Item 28    Location of Accounts and Records

           Registrant  maintains  the records,  required by Rules 31a - 1(a) and
           (b), and 31a - 2(a) at its main office.

           Lord, Abbett & Co. maintains the records required by Rules 31a - 1(f)
           and 31a - 2(e) at its main office.

           Certain   records   such  as   cancelled   stock   certificates   and
           correspondence may be physically maintained at the main office of the
           Registrant's  Transfer  Agent,  Custodian,  or Shareholder  Servicing
           Agent within the requirements of Rule 31a-3.


Item 29    Management Services

           None


Item 30    Undertakings

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

           The registrant undertakes, if requested to do so by the holders of at
           least 10% of the registrant's  outstanding  shares, to call a meeting
           of  shareholders  for the  purpose  of voting  upon the  question  of
           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, as amended.



<PAGE>


                           SIGNATURES

         Pursuant  to the  requirements  of the  Securities  Act of 1933 and the
Investment  Company  Act of 1940,  the Fund  certifies  that it meets all of the
requirements for effectiveness of this registration  statement under rule 485(b)
under the Securities Act and had duly caused this  registration  statement to be
signed on its behalf by the  undersigned,  duly  authorized,  in the City of New
York, and State of New York on the 31st day of May, 2000.

                                        LORD ABBET DEVELOPING GROWTH FUND, INC.

                                        BY:      /s/ Lawrence H. Kaplan
                                                 ----------------------
                                                 Lawrence H. Kaplan
                                                 Vice President

                                        By:      /s/ Donna M. McManus
                                                 ----------------------
                                                 Donna M. McManus
                                                 Treasurer

Pursuant to the  requirements of the Securities Act of 1933,  this  Registration
Statement has been signed below by the following  persons in the  capacities and
on the dates indicated.

Signatures                       Title                              Date

                                 Chairman, President
/s/ Robert S. Dow                and Director/Trustee               May 31, 2000
---------------------------      --------------------------         ------------
Robert S. Dow

/s/ E. Thayer Bigelow            Director/Trustee                   May 31, 2000
---------------------------      --------------------------         ------------
E. Thayer Bigelow

/s/ William H. T. Bush           Director/Trustee                   May 31, 2000
---------------------------      --------------------------         ------------
William H. T. Bush

/s/ Robert B. Calhoun, Jr.       Director/Trustee                   May 31, 2000
---------------------------      --------------------------         ------------
Robert B. Calhoun, Jr

/s/ Stewart S. Dixon             Director/Trustee                   May 31, 2000
---------------------------      --------------------------         ------------
Stewart S. Dixon

/s/ John C. Jansing              Director/Trustee                   May 31, 2000
---------------------------      --------------------------         ------------
John C. Jansing

/s/ C. Alan MacDonald            Director/Trustee                   May 31, 2000
---------------------------      --------------------------         ------------
C. Alan MacDonald

/s/ Hansel B. Millican, Jr.      Director/Trustee                   May 31, 2000
---------------------------     ---------------------------         ------------
Hansel B. Millican, Jr.

/s/ Thomas J. Neff               Director/Trustee                   May 31, 2000
---------------------------      --------------------------         ------------
Thomas J. Neff


                                    BY:     /s/ Lawrence H. Kaplan
                                            ----------------------
                                            Lawrence H. Kaplan
                                            Attorney - in - Fact



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