<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM IMMULOGIC
PHARMACEUTICAL CORPORATIONS FINANCIAL STATEMENTS FILED IN Q1 1999 QUARTERLY
REPORT ON FORM 10-Q CONDENSED CONSOLIDATED BALANCE SHEET AND INCOME STATEMENT
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FORM 10-Q DATED JUNE 30,
1999.
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             APR-01-1999
<PERIOD-END>                               JUN-30-1999
<EXCHANGE-RATE>                                      1
<CASH>                                          24,878
<SECURITIES>                                    25,539
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                33,187
<PP&E>                                               0
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                                  52,665
<CURRENT-LIABILITIES>                            1,826
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           204
<OTHER-SE>                                      50,635
<TOTAL-LIABILITY-AND-EQUITY>                    52,665
<SALES>                                              0
<TOTAL-REVENUES>                                   348
<CGS>                                                0
<TOTAL-COSTS>                                      348
<OTHER-EXPENSES>                                 1,598
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                (1,072)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                            (1,072)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (1,072)
<EPS-BASIC>                                   (0.05)
<EPS-DILUTED>                                   (0.05)
<FN>
<F1>MARKETABLE SECURITIES INCLUDES $17,411 IN LONG-TERM INVESTMENTS.
</FN>