<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                           <C>                 <C>                 <C>                <C>               

<PERIOD-TYPE>                 YEAR                YEAR                YEAR                YEAR                
<FISCAL-YEAR-END>             DEC-31-1998         DEC-31-1997         DEC-31-1996         DEC-31-1995         
<PERIOD-START>                JAN-01-1998         JAN-01-1997         JAN-01-1996         JAN-01-1995         
<PERIOD-END>                  DEC-31-1998         DEC-31-1997         DEC-31-1996         DEC-31-1995         
<CASH>                             31,036              24,305              28,534              12,117               
<SECURITIES>                            0                   0                   0                   0                   
<RECEIVABLES>                           0                   0                   0                   0                   
<ALLOWANCES>                            0                   0                   0                   0                   
<INVENTORY>                             0                   0                   0                   0                   
<CURRENT-ASSETS>                        0                   0                   0                   0                   
<PP&E>                                  0                   0                   0                   0                   
<DEPRECIATION>                          0                   0                   0                   0                   
<TOTAL-ASSETS>                     44,949              30,294              30,733              13,306               
<CURRENT-LIABILITIES>                   0                   0                   0                   0                   
<BONDS>                                 0                   0                   0                   0                   
<PREFERRED-MANDATORY>                   0                   0                   0                   0                   
<PREFERRED>                             0                   0                   0                   0                   
<COMMON>                                0                   0                   0                   0                   
<OTHER-SE>                              0                   0                   0                   0                   
<TOTAL-LIABILITY-AND-EQUITY>       44,949              30,294              30,733              13,306               
<SALES>                                 0                   0                   0                   0                   
<TOTAL-REVENUES>                   17,515               3,685                 730                 155                 
<CGS>                                   0                   0                   0                   0                   
<TOTAL-COSTS>                           0                   0                   0                   0                   
<OTHER-EXPENSES>                   34,210              19,464              10,939               5,774               
<LOSS-PROVISION>                        0                   0                   0                   0                   
<INTEREST-EXPENSE>                      0                   0                   0                   0                   
<INCOME-PRETAX>                         0                   0                   0                   0                   
<INCOME-TAX>                            0                   0                   0                   0                   
<INCOME-CONTINUING>                     0                   0                   0                   0                   
<DISCONTINUED>                          0                   0                   0                   0                   
<EXTRAORDINARY>                         0                   0                   0                   0                   
<CHANGES>                               0                   0                   0                   0                   
<NET-INCOME>                     (15,454)<F1>        (14,684)<F1>         (9,082)<F1>         (5,433)<F1>         
<EPS-PRIMARY>                      (1.32)<F1>          (1.43)<F1>          (1.49)<F1>          (5.41)<F1>          
<EPS-DILUTED>                      (1.32)<F1>          (1.43)<F1>          (1.49)<F1>          (5.41)<F1>          
<FN>
<F1>In thousands, except per share amount
</FN>
        

</TABLE>