[Letterhead of Ropes & Gray LLP]

                                                                Exhibit (11)(a)

July 3, 2007

Loomis Sayles Value Fund
399 Boylston Street
Boston, Massachusetts 02116

Re: Registration Statement on Form N-14

Ladies and Gentlemen:

   We have acted as counsel to Loomis Sayles Value Fund (the "Acquiring Fund"),
a series of Loomis Sayles Funds II (the "Loomis Sayles Trust"), in connection
with the Registration Statement of the Loomis Sayles Trust on Form N-14 (the
"Registration Statement") being filed by the Loomis Sayles Trust today under
the Securities Act of 1933, as amended (the "Act"), relating to the proposed
acquisition by the Acquiring Fund of the assets and liabilities of IXIS Value
Fund (the "Acquired Fund"), a series of IXIS Advisor Funds Trust I (the
"Acquired Fund Trust"), and the issuance of shares of beneficial interest of
specified classes of the Acquiring Fund in connection therewith (the "Shares"),
all in accordance with the terms of the Agreement and Plan of Reorganization by
and among the Loomis Sayles Trust, on behalf of the Acquiring Fund, and the
Acquired Fund Trust, on behalf of the Acquired Fund (the "Agreement and Plan of
Reorganization"), in substantially the form included in the Registration
Statement.

   We have examined the Loomis Sayles Trust's First Amended and Restated
Agreement and Declaration of Trust dated July 29, 2005 (the "Agreement and
Declaration of Trust"), on file in the office of the Secretary of the
Commonwealth of Massachusetts, and the Loomis Sayles Trust's By-Laws, as
amended to the date hereof. We have also examined such other documents and
records as we have deemed necessary for the purposes of this opinion.

   We have assumed for purposes of this opinion that, prior to the date of the
issuance of the Shares, (i) the shareholders of the Acquired Fund will have
taken all action required of them for the approval of the Agreement and Plan of
Reorganization and (ii) the Agreement and Plan of Reorganization will have been
duly executed and delivered by each party thereto.

   Based upon the foregoing, we are of the opinion that:

   1. The Loomis Sayles Trust is a duly organized and validly existing
unincorporated association with transferable shares under the laws of the
Commonwealth of Massachusetts and is authorized to issue an unlimited number of
its shares of beneficial interest.



Loomis Sayles Value Fund                                          July 3, 2007

   2. When issued in accordance with the Agreement and Plan of Reorganization,
the Shares will be validly issued, fully paid and, except as set forth in the
following paragraph, nonassessable by the Loomis Sayles Trust.

   The Loomis Sayles Trust is an entity of the type commonly known as a
"Massachusetts business trust." Under Massachusetts law, shareholders could,
under certain circumstances, be held personally liable for the obligations of
the Loomis Sayles Trust. However, the Agreement and Declaration of Trust
disclaims shareholder liability for acts or obligations of the Loomis Sayles
Trust and requires that a notice of such disclaimer be given in each note,
bond, contract, instrument, certificate or undertaking made or issued by the
Loomis Sayles Trust's trustees or officers. The Agreement and Declaration of
Trust provides that in case any shareholder or former shareholder shall be held
to be personally liable solely by reason of his or her being or having been a
shareholder and not because of his or her acts or omissions or for some other
reason, the shareholder or former shareholder (or his or her heirs, executors,
administrators or other legal representatives or, in the case of a corporation
or other entity, its corporate or other general successor) shall be entitled
out of the assets of the series of which he or she is or was a shareholder to
be held harmless from and indemnified against all loss and expense arising from
such liability. Thus, the risk of a shareholder's incurring financial loss on
account of shareholder liability is limited to circumstances in which the
particular series of which he or she is or was a shareholder would be unable to
meet its obligations.

   We understand that this opinion is to be used in connection with the
registration of the Shares for offering and sale pursuant to the Act. We
consent to the filing of this opinion with and as part of the Registration
Statement.

                                                  Very truly yours,

                                                  /s/ Ropes & Gray LLP

                                                  Ropes & Gray LLP

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