1

                                                                    Exhibit 23.1



CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent public accountants, we hereby consent to the incorporation of our
report dated February 4, 2000 included in and incorporated by reference in this
Form 10-K, into the Company's previously filed Registration Statements on Form
S-8 File No. 33-28344, File No. 33-29113, File No. 33-41757, File No. 33-59045,
File No. 33-59081 and File No. 333-94713. It should be noted that we have not
audited any financial statements of the Company subsequent to December 31, 1999
or performed any audit procedures subsequent to the date of our report.



                                             /s/ ARTHUR ANDERSEN LLP
                                             ---------------------------------
                                             ARTHUR ANDERSEN LLP


Boston, Massachusetts
March 27, 2000