<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000918294
<NAME> T. ROWE PRICE MID-CAP GROWTH PORTFOLIO
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> JUN-30-2000
<INVESTMENTS-AT-COST> 203890
<INVESTMENTS-AT-VALUE> 232102
<RECEIVABLES> 1578
<ASSETS-OTHER> 4
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 233684
<PAYABLE-FOR-SECURITIES> 1687
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 194
<TOTAL-LIABILITIES> 1881
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 198596
<SHARES-COMMON-STOCK> 12543
<SHARES-COMMON-PRIOR> 7288
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (26)
<ACCUMULATED-NET-GAINS> 5025
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 28212
<NET-ASSETS> 231803
<DIVIDEND-INCOME> 255
<INTEREST-INCOME> 462
<OTHER-INCOME> 0
<EXPENSES-NET> 751
<NET-INVESTMENT-INCOME> (34)
<REALIZED-GAINS-CURRENT> 3033
<APPREC-INCREASE-CURRENT> 7016
<NET-CHANGE-FROM-OPS> 10015
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5814
<NUMBER-OF-SHARES-REDEEMED> (559)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 104575
<ACCUMULATED-NII-PRIOR> 8
<ACCUMULATED-GAINS-PRIOR> 1992
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 0
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 751
<AVERAGE-NET-ASSETS> 178115
<PER-SHARE-NAV-BEGIN> 17.46
<PER-SHARE-NII> 0
<PER-SHARE-GAIN-APPREC> 1.02
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 18.48
<EXPENSE-RATIO> 0.85
</TABLE>
