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<PAGE> PAGE 14
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<PAGE> PAGE 16
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<PAGE> PAGE 17
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062 H001500 0.0
062 I001500 8.4
062 J001500 0.0
062 K001500 0.0
062 L001500 0.0
062 M001500 0.0
062 N001500 0.0
062 O001500 0.0
062 P001500 0.0
062 Q001500 0.0
062 R001500 -0.2
063 A001500 35
063 B001500 0.0
064 A001500 N
064 B001500 N
070 A011500 Y
070 A021500 Y
070 B011500 N
070 B021500 N
070 C011500 N
070 C021500 N
070 D011500 N
070 D021500 N
070 E011500 N
070 E021500 N
070 F011500 N
070 F021500 N
070 G011500 N
070 G021500 N
070 H011500 N
070 H021500 N
070 I011500 N
070 I021500 N
070 J011500 Y
070 J021500 Y
070 K011500 Y
070 K021500 N
<PAGE> PAGE 20
070 L011500 N
070 L021500 N
070 M011500 N
070 M021500 N
070 N011500 Y
070 N021500 N
070 O011500 Y
070 O021500 N
070 P011500 N
070 P021500 N
070 Q011500 N
070 Q021500 N
070 R011500 Y
070 R021500 N
071 A001500 0
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072 B001500 26376
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072DD021500 17406
072EE001500 10
073 A011500 0.0501
073 A021500 0.0545
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074 P001500 213
074 Q001500 0
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074 R021500 0
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074 R041500 3829
074 S001500 0
074 T001500 1036679
074 U011500 213239
074 U021500 820670
<PAGE> PAGE 21
074 V011500 1.00
074 V021500 1.00
074 W001500 1.0000
074 X001500 12184
074 Y001500 0
075 A001500 472338
075 B001500 0
028 A011600 30677
028 A021600 303
028 A031600 0
028 A041600 21741
028 B011600 40696
028 B021600 332
028 B031600 0
028 B041600 28024
028 C011600 44247
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028 E021600 358
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028 F011600 60411
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028 F031600 0
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028 G011600 315665
028 G021600 2017
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028 H001600 0
062 A001600 Y
062 B001600 0.0
062 C001600 0.0
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062 F001600 0.0
062 G001600 0.0
062 H001600 0.0
062 I001600 0.0
062 J001600 0.0
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<PAGE> PAGE 22
062 P001600 0.0
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062 R001600 -1.1
063 A001600 61
063 B001600 0.0
064 A001600 N
064 B001600 N
071 A001600 0
071 B001600 0
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071 D001600 0
072 A001600 12
072 B001600 4261
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072BB001600 0
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072DD021600 678
072EE001600 26
073 A011600 0.0318
073 A021600 0.0360
073 B001600 0.0000
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<PAGE> PAGE 23
074 D001600 0
074 E001600 0
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074 L001600 1236
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074 T001600 164026
074 U011600 105011
074 U021600 41319
074 V011600 1.00
074 V021600 1.00
074 W001600 1.0007
074 X001600 5420
074 Y001600 0
075 A001600 113132
075 B001600 0
076 001600 0.00
049 001700 N
050 001700 N
051 001700 N
052 001700 N
053 A001700 N
062 A001700 Y
062 B001700 0.0
062 C001700 0.0
062 D001700 4.7
062 E001700 0.0
062 F001700 0.0
062 G001700 0.0
062 H001700 0.0
062 I001700 4.8
062 J001700 0.0
062 K001700 0.0
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<PAGE> PAGE 24
062 Q001700 0.0
062 R001700 -0.8
070 A011700 Y
070 A021700 Y
070 B011700 Y
070 B021700 N
070 C011700 Y
070 C021700 N
070 D011700 Y
070 D021700 N
070 E011700 Y
070 E021700 N
070 F011700 Y
070 F021700 N
070 G011700 Y
070 G021700 N
070 H011700 Y
070 H021700 N
070 I011700 Y
070 I021700 N
070 J011700 Y
070 J021700 Y
070 K011700 Y
070 K021700 N
070 L011700 Y
070 L021700 Y
070 M011700 Y
070 M021700 Y
070 N011700 Y
070 N021700 N
070 O011700 Y
070 O021700 N
070 P011700 N
070 P021700 N
070 Q011700 N
070 Q021700 N
070 R011700 Y
070 R021700 N
071 A001700 1166348
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072 A001700 12
074 N001700 284650
074 T001700 268217
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075 B001700 380942
025 A001801 CHARLES SCHWAB CORP.
025 B001801 94-1737782
025 C001801 E
025 D001801 11735
<PAGE> PAGE 25
025 D001802 0
025 D001803 0
025 D001804 0
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025 D001807 0
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062 A001800 N
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062 D001800 0.0
062 E001800 0.0
062 F001800 0.0
062 G001800 0.0
062 H001800 0.0
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071 A001800 915583
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074 N001800 968754
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076 001800 0.00
025 A001901 CHARLES SCHWAB CORP.
025 B001901 94-1737782
025 C001901 E
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025 A001902 DELETE
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<PAGE> PAGE 26
028 B011900 10502
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062 A001900 N
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<PAGE> PAGE 27
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<PAGE> PAGE 28
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024 002000 N
025 A002001 DELETE
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<PAGE> PAGE 29
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070 A012000 Y
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<PAGE> PAGE 30
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<PAGE> PAGE 31
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SIGNATURE GLENN P. O'FLAHERTY
TITLE TREASURER
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
[DESCRIPTION] FDS JANUS FUND
[TEXT]
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 001
<NAME> JANUS FUND
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
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<SHARES-COMMON-PRIOR> 648151
<ACCUMULATED-NII-CURRENT> 0
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<OVERDISTRIBUTION-GAINS> 0
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<NET-ASSETS> 20721262
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<OTHER-INCOME> 0
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<APPREC-INCREASE-CURRENT> 2210595
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<EQUALIZATION> 0
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<DISTRIBUTIONS-OF-GAINS> 3125216
<DISTRIBUTIONS-OTHER> 0
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</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 002
<NAME> JANUS TWENTY FUND
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
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<ACCUMULATED-NII-CURRENT> 31035
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</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirely by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 003
<NAME> JANUS VENTURE FUND
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
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<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 89289
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 225894
<NET-ASSETS> 1035868
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<OTHER-INCOME> 0
<EXPENSES-NET> 10872
<NET-INVESTMENT-INCOME> 3380
<REALIZED-GAINS-CURRENT> 88939
<APPREC-INCREASE-CURRENT> 64755
<NET-CHANGE-FROM-OPS> 20804
<EQUALIZATION> 0
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<NUMBER-OF-SHARES-SOLD> 3296
<NUMBER-OF-SHARES-REDEEMED> 7687
<SHARES-REINVESTED> 3904
<NET-CHANGE-IN-ASSETS> 216473
<ACCUMULATED-NII-PRIOR> 3432
<ACCUMULATED-GAINS-PRIOR> 191545
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 8032
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 11045
<AVERAGE-NET-ASSETS> 1174220
<PER-SHARE-NAV-BEGIN> 58.840
<PER-SHARE-NII> 0.090
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<PER-SHARE-DISTRIBUTIONS> 9.300
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<PER-SHARE-NAV-END> 49.810
<EXPENSE-RATIO> 0.940
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 004
<NAME> JANUS ENTERPRISE FUND
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 455646
<INVESTMENTS-AT-VALUE> 576940
<RECEIVABLES> 10309
<ASSETS-OTHER> 1815
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 589064
<PAYABLE-FOR-SECURITIES> 23625
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 6440
<TOTAL-LIABILITIES> 30065
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 361296
<SHARES-COMMON-STOCK> 17291
<SHARES-COMMON-PRIOR> 17881
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 76223
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 121480
<NET-ASSETS> 558999
<DIVIDEND-INCOME> 1684
<INTEREST-INCOME> 472
<OTHER-INCOME> 0
<EXPENSES-NET> 5825
<NET-INVESTMENT-INCOME> 3669
<REALIZED-GAINS-CURRENT> 79005
<APPREC-INCREASE-CURRENT> 12029
<NET-CHANGE-FROM-OPS> 63307
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 34480
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 16290
<NUMBER-OF-SHARES-REDEEMED> 18034
<SHARES-REINVESTED> 1154
<NET-CHANGE-IN-ASSETS> 7171
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 35367
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3982
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 5963
<AVERAGE-NET-ASSETS> 551467
<PER-SHARE-NAV-BEGIN> 30.860
<PER-SHARE-NII> 0.000
<PER-SHARE-GAIN-APPREC> 3.430
<PER-SHARE-DIVIDEND> 0.000
<PER-SHARE-DISTRIBUTIONS> 1.960
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 32.330
<EXPENSE-RATIO> 1.080
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 005
<NAME> JANUS WORLDWIDE FUND
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 11347700
<INVESTMENTS-AT-VALUE> 13948548
<RECEIVABLES> 201338
<ASSETS-OTHER> 647
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 14150533
<PAYABLE-FOR-SECURITIES> 113989
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 104554
<TOTAL-LIABILITIES> 218543
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 11702483
<SHARES-COMMON-STOCK> 335568
<SHARES-COMMON-PRIOR> 258645
<ACCUMULATED-NII-CURRENT> 61968
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 359700
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2527239
<NET-ASSETS> 13931990
<DIVIDEND-INCOME> 133821
<INTEREST-INCOME> 45943
<OTHER-INCOME> 0
<EXPENSES-NET> 117830
<NET-INVESTMENT-INCOME> 61934
<REALIZED-GAINS-CURRENT> 331717
<APPREC-INCREASE-CURRENT> 1260143
<NET-CHANGE-FROM-OPS> 990360
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 50801
<DISTRIBUTIONS-OF-GAINS> 676334
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 204904
<NUMBER-OF-SHARES-REDEEMED> 146793
<SHARES-REINVESTED> 18812
<NET-CHANGE-IN-ASSETS> 3573765
<ACCUMULATED-NII-PRIOR> 69045
<ACCUMULATED-GAINS-PRIOR> 630141
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 85269
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 120512
<AVERAGE-NET-ASSETS> 13078350
<PER-SHARE-NAV-BEGIN> 40.050
<PER-SHARE-NII> 1.260
<PER-SHARE-GAIN-APPREC> 3.010
<PER-SHARE-DIVIDEND> 1.350
<PER-SHARE-DISTRIBUTIONS> 1.450
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 41.520
<EXPENSE-RATIO> 0.920
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 006
<NAME> JANUS GROWTH AND INCOME FUND
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 2331485
<INVESTMENTS-AT-VALUE> 2825721
<RECEIVABLES> 18100
<ASSETS-OTHER> 1103
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 2844924
<PAYABLE-FOR-SECURITIES> 18678
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 7167
<TOTAL-LIABILITIES> 25845
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 2102737
<SHARES-COMMON-STOCK> 106584
<SHARES-COMMON-PRIOR> 75342
<ACCUMULATED-NII-CURRENT> 5513
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 219309
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 491520
<NET-ASSETS> 2819079
<DIVIDEND-INCOME> 18143
<INTEREST-INCOME> 13361
<OTHER-INCOME> 0
<EXPENSES-NET> 23209
<NET-INVESTMENT-INCOME> 8295
<REALIZED-GAINS-CURRENT> 220260
<APPREC-INCREASE-CURRENT> 104949
<NET-CHANGE-FROM-OPS> 333504
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 3592
<DISTRIBUTIONS-OF-GAINS> 184658
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 54594
<NUMBER-OF-SHARES-REDEEMED> 31457
<SHARES-REINVESTED> 8105
<NET-CHANGE-IN-ASSETS> 930080
<ACCUMULATED-NII-PRIOR> 823
<ACCUMULATED-GAINS-PRIOR> 183694
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 16513
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 23782
<AVERAGE-NET-ASSETS> 2478899
<PER-SHARE-NAV-BEGIN> 25.070
<PER-SHARE-NII> 0.080
<PER-SHARE-GAIN-APPREC> 3.720
<PER-SHARE-DIVIDEND> 0.040
<PER-SHARE-DISTRIBUTIONS> 2.380
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 26.450
<EXPENSE-RATIO> 0.960
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31,1998 included in the Fund's Annual Report and is "
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 007
<NAME> JANUS BALANCED FUND
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 740915
<INVESTMENTS-AT-VALUE> 822729
<RECEIVABLES> 20238
<ASSETS-OTHER> 560
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 843527
<PAYABLE-FOR-SECURITIES> 12029
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1449
<TOTAL-LIABILITIES> 13478
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 737933
<SHARES-COMMON-STOCK> 48209
<SHARES-COMMON-PRIOR> 21530
<ACCUMULATED-NII-CURRENT> 4165
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 6135
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 81816
<NET-ASSETS> 830049
<DIVIDEND-INCOME> 4522
<INTEREST-INCOME> 13427
<OTHER-INCOME> 0
<EXPENSES-NET> 5410
<NET-INVESTMENT-INCOME> 12539
<REALIZED-GAINS-CURRENT> 5846
<APPREC-INCREASE-CURRENT> 49716
<NET-CHANGE-FROM-OPS> 68101
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 10977
<DISTRIBUTIONS-OF-GAINS> 34067
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 37044
<NUMBER-OF-SHARES-REDEEMED> 13233
<SHARES-REINVESTED> 2868
<NET-CHANGE-IN-ASSETS> 469890
<ACCUMULATED-NII-PRIOR> 2406
<ACCUMULATED-GAINS-PRIOR> 34553
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3870
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 5512
<AVERAGE-NET-ASSETS> 536524
<PER-SHARE-NAV-BEGIN> 16.730
<PER-SHARE-NII> 0.330
<PER-SHARE-GAIN-APPREC> 2.000
<PER-SHARE-DIVIDEND> 0.350
<PER-SHARE-DISTRIBUTIONS> 1.490
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 17.220
<EXPENSE-RATIO> 1.030
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 008
<NAME> JANUS FLEXIBLE INCOME FUND
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 1102565
<INVESTMENTS-AT-VALUE> 1118112
<RECEIVABLES> 24613
<ASSETS-OTHER> 217
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1142942
<PAYABLE-FOR-SECURITIES> 34947
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 4404
<TOTAL-LIABILITIES> 39351
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1075251
<SHARES-COMMON-STOCK> 111320
<SHARES-COMMON-PRIOR> 72706
<ACCUMULATED-NII-CURRENT> 708
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 12577
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 15055
<NET-ASSETS> 1103591
<DIVIDEND-INCOME> 1177
<INTEREST-INCOME> 65763
<OTHER-INCOME> 0
<EXPENSES-NET> 7315
<NET-INVESTMENT-INCOME> 59625
<REALIZED-GAINS-CURRENT> 13197
<APPREC-INCREASE-CURRENT> 8610
<NET-CHANGE-FROM-OPS> 64212
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 59616
<DISTRIBUTIONS-OF-GAINS> 15666
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 69152
<NUMBER-OF-SHARES-REDEEMED> 37113
<SHARES-REINVESTED> 6575
<NET-CHANGE-IN-ASSETS> 376490
<ACCUMULATED-NII-PRIOR> 610
<ACCUMULATED-GAINS-PRIOR> 15135
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 5211
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 7545
<AVERAGE-NET-ASSETS> 892853
<PER-SHARE-NAV-BEGIN> 10.000
<PER-SHARE-NII> 0.670
<PER-SHARE-GAIN-APPREC> 0.120
<PER-SHARE-DIVIDEND> 0.670
<PER-SHARE-DISTRIBUTIONS> 0.210
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 9.910
<EXPENSE-RATIO> 0.840
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 010
<NAME> JANUS SHORT TERM BOND FUND
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 138098
<INVESTMENTS-AT-VALUE> 138931
<RECEIVABLES> 3174
<ASSETS-OTHER> 41
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 142146
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1240
<TOTAL-LIABILITIES> 1240
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 142939
<SHARES-COMMON-STOCK> 48497
<SHARES-COMMON-PRIOR> 19980
<ACCUMULATED-NII-CURRENT> 1
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 2428
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 394
<NET-ASSETS> 140906
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 5879
<OTHER-INCOME> 0
<EXPENSES-NET> 582
<NET-INVESTMENT-INCOME> 5297
<REALIZED-GAINS-CURRENT> 401
<APPREC-INCREASE-CURRENT> 14
<NET-CHANGE-FROM-OPS> 5684
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 5297
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 60319
<NUMBER-OF-SHARES-REDEEMED> 33460
<SHARES-REINVESTED> 1658
<NET-CHANGE-IN-ASSETS> 82998
<ACCUMULATED-NII-PRIOR> 1
<ACCUMULATED-GAINS-PRIOR> 2829
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 582
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 950
<AVERAGE-NET-ASSETS> 89556
<PER-SHARE-NAV-BEGIN> 2.900
<PER-SHARE-NII> 0.170
<PER-SHARE-GAIN-APPREC> 0.010
<PER-SHARE-DIVIDEND> 0.170
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 2.910
<EXPENSE-RATIO> 0.670
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 011
<NAME> JANUS MERCURY FUND
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 1857923
<INVESTMENTS-AT-VALUE> 2349455
<RECEIVABLES> 37126
<ASSETS-OTHER> 1731
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 2388312
<PAYABLE-FOR-SECURITIES> 14262
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 5973
<TOTAL-LIABILITIES> 20235
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1644255
<SHARES-COMMON-STOCK> 114002
<SHARES-COMMON-PRIOR> 105674
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 234405
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 489417
<NET-ASSETS> 2368077
<DIVIDEND-INCOME> 8451
<INTEREST-INCOME> 4544
<OTHER-INCOME> 0
<EXPENSES-NET> 19858
<NET-INVESTMENT-INCOME> 6863
<REALIZED-GAINS-CURRENT> 243921
<APPREC-INCREASE-CURRENT> 204681
<NET-CHANGE-FROM-OPS> 441739
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 4295
<DISTRIBUTIONS-OF-GAINS> 196658
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 80428
<NUMBER-OF-SHARES-REDEEMED> 84267
<SHARES-REINVESTED> 12167
<NET-CHANGE-IN-ASSETS> 397028
<ACCUMULATED-NII-PRIOR> 5512
<ACCUMULATED-GAINS-PRIOR> 192788
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 14071
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 20430
<AVERAGE-NET-ASSETS> 2103414
<PER-SHARE-NAV-BEGIN> 18.650
<PER-SHARE-NII> 0.010
<PER-SHARE-GAIN-APPREC> 4.070
<PER-SHARE-DIVIDEND> 0.040
<PER-SHARE-DISTRIBUTIONS> 1.900
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 20.770
<EXPENSE-RATIO> 0.970
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 012
<NAME> JANUS FEDERAL TAX - EXEMPT FUND
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 91775
<INVESTMENTS-AT-VALUE> 93941
<RECEIVABLES> 4811
<ASSETS-OTHER> 140
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 98892
<PAYABLE-FOR-SECURITIES> 6924
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 343
<TOTAL-LIABILITIES> 7267
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 89965
<SHARES-COMMON-STOCK> 12595
<SHARES-COMMON-PRIOR> 8755
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 506
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2166
<NET-ASSETS> 91625
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 4012
<OTHER-INCOME> 0
<EXPENSES-NET> 482
<NET-INVESTMENT-INCOME> 3530
<REALIZED-GAINS-CURRENT> 945
<APPREC-INCREASE-CURRENT> 701
<NET-CHANGE-FROM-OPS> 5176
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 3530
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 9960
<NUMBER-OF-SHARES-REDEEMED> 6525
<SHARES-REINVESTED> 405
<NET-CHANGE-IN-ASSETS> 29570
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1451
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 445
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 735
<AVERAGE-NET-ASSETS> 74133
<PER-SHARE-NAV-BEGIN> 7.090
<PER-SHARE-NII> 0.340
<PER-SHARE-GAIN-APPREC> 0.180
<PER-SHARE-DIVIDEND> 0.340
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 7.270
<EXPENSE-RATIO> 0.670
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31,1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 013
<NAME> JANUS OVERSEAS FUND
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 3385944
<INVESTMENTS-AT-VALUE> 3921704
<RECEIVABLES> 63376
<ASSETS-OTHER> 1081
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 3986161
<PAYABLE-FOR-SECURITIES> 43390
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 53673
<TOTAL-LIABILITIES> 97063
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 3548643
<SHARES-COMMON-STOCK> 216615
<SHARES-COMMON-PRIOR> 178699
<ACCUMULATED-NII-CURRENT> 19959
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 175453
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 495949
<NET-ASSETS> 3889098
<DIVIDEND-INCOME> 45935
<INTEREST-INCOME> 13965
<OTHER-INCOME> 0
<EXPENSES-NET> 37156
<NET-INVESTMENT-INCOME> 22744
<REALIZED-GAINS-CURRENT> 174093
<APPREC-INCREASE-CURRENT> 200570
<NET-CHANGE-FROM-OPS> 49221
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 16883
<DISTRIBUTIONS-OF-GAINS> 89374
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 220566
<NUMBER-OF-SHARES-REDEEMED> 188605
<SHARES-REINVESTED> 5955
<NET-CHANGE-IN-ASSETS> 683901
<ACCUMULATED-NII-PRIOR> 19546
<ACCUMULATED-GAINS-PRIOR> 82566
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 26061
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 37810
<AVERAGE-NET-ASSETS> 3948710
<PER-SHARE-NAV-BEGIN> 17.940
<PER-SHARE-NII> 0.080
<PER-SHARE-GAIN-APPREC> 0.540
<PER-SHARE-DIVIDEND> 0.100
<PER-SHARE-DISTRIBUTIONS> 0.510
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 17.950
<EXPENSE-RATIO> 0.960
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 141
<NAME> JANUS MONEY MARKET FUND - INVESTOR SHARES
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 6672769
<INVESTMENTS-AT-VALUE> 0
<RECEIVABLES> 40546
<ASSETS-OTHER> 173
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 6713488
<PAYABLE-FOR-SECURITIES> 177403
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 27633
<TOTAL-LIABILITIES> 205036
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 6508452
<SHARES-COMMON-STOCK> 1492023
<SHARES-COMMON-PRIOR> 1032647
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 1492023
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 273633
<OTHER-INCOME> 0
<EXPENSES-NET> 12377
<NET-INVESTMENT-INCOME> 261256
<REALIZED-GAINS-CURRENT> 161
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 261417
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 57683
<DISTRIBUTIONS-OF-GAINS> 42
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5447777
<NUMBER-OF-SHARES-REDEEMED> 5042859
<SHARES-REINVESTED> 54458
<NET-CHANGE-IN-ASSETS> 459376
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1124
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 6828
<AVERAGE-NET-ASSETS> 1123991
<PER-SHARE-NAV-BEGIN> 1.000
<PER-SHARE-NII> 0.050
<PER-SHARE-GAIN-APPREC> 0.000
<PER-SHARE-DIVIDEND> 0.050
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 1.000
<EXPENSE-RATIO> 0.600
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated Ocotber 31, 1998 included in the Fund's Annual Report and is
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 142
<NAME> JANUS MONEY MARKET FUND - INSTITUTIONAL SHARES
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 6672769
<INVESTMENTS-AT-VALUE> 0
<RECEIVABLES> 40546
<ASSETS-OTHER> 173
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 6713488
<PAYABLE-FOR-SECURITIES> 177403
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 27633
<TOTAL-LIABILITIES> 205036
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 6508452
<SHARES-COMMON-STOCK> 4973909
<SHARES-COMMON-PRIOR> 2770961
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 4973909
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 273633
<OTHER-INCOME> 0
<EXPENSES-NET> 12377
<NET-INVESTMENT-INCOME> 261256
<REALIZED-GAINS-CURRENT> 161
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 261417
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 202020
<DISTRIBUTIONS-OF-GAINS> 118
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 89394668
<NUMBER-OF-SHARES-REDEEMED> 87252582
<SHARES-REINVESTED> 60862
<NET-CHANGE-IN-ASSETS> 2202948
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3621
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 5515
<AVERAGE-NET-ASSETS> 3620872
<PER-SHARE-NAV-BEGIN> 1.000
<PER-SHARE-NII> 0.060
<PER-SHARE-GAIN-APPREC> 0.000
<PER-SHARE-DIVIDEND> 0.060
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 1.000
<EXPENSE-RATIO> 0.150
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 143
<NAME> JANUS MONEY MARKET FUND - SERVICE SHARES
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 6672769
<INVESTMENTS-AT-VALUE> 0
<RECEIVABLES> 40546
<ASSETS-OTHER> 173
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 6713488
<PAYABLE-FOR-SECURITIES> 177403
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 27633
<TOTAL-LIABILITIES> 205036
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 6508452
<SHARES-COMMON-STOCK> 42520
<SHARES-COMMON-PRIOR> 10341
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 42520
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 273633
<OTHER-INCOME> 0
<EXPENSES-NET> 12377
<NET-INVESTMENT-INCOME> 261256
<REALIZED-GAINS-CURRENT> 161
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 261417
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 1553
<DISTRIBUTIONS-OF-GAINS> 1
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 323786
<NUMBER-OF-SHARES-REDEEMED> 293167
<SHARES-REINVESTED> 1560
<NET-CHANGE-IN-ASSETS> 32179
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 29
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 202
<AVERAGE-NET-ASSETS> 29322
<PER-SHARE-NAV-BEGIN> 1.000
<PER-SHARE-NII> 0.050
<PER-SHARE-GAIN-APPREC> 0.000
<PER-SHARE-DIVIDEND> 0.050
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 1.000
<EXPENSE-RATIO> 0.400
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31,1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 151
<NAME> JANUS GOVT MONEY MARKET FUND - INVESTOR SHARES
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 1038994
<INVESTMENTS-AT-VALUE> 1038994
<RECEIVABLES> 1634
<ASSETS-OTHER> 93
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1040721
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 4042
<TOTAL-LIABILITIES> 4042
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1036679
<SHARES-COMMON-STOCK> 213239
<SHARES-COMMON-PRIOR> 132134
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 213239
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 26376
<OTHER-INCOME> 0
<EXPENSES-NET> 1400
<NET-INVESTMENT-INCOME> 24976
<REALIZED-GAINS-CURRENT> 10
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 24986
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 7537
<DISTRIBUTIONS-OF-GAINS> 5
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 384359
<NUMBER-OF-SHARES-REDEEMED> 310430
<SHARES-REINVESTED> 7176
<NET-CHANGE-IN-ASSETS> 81105
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 151
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 915
<AVERAGE-NET-ASSETS> 150525
<PER-SHARE-NAV-BEGIN> 1.000
<PER-SHARE-NII> 0.050
<PER-SHARE-GAIN-APPREC> 0.000
<PER-SHARE-DIVIDEND> 0.050
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 1.000
<EXPENSE-RATIO> 0.600
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31,1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 152
<NAME> JANUS GOVT MONEY MARKET FUND - INSTITUTIONAL SHARES
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 1038994
<INVESTMENTS-AT-VALUE> 1038994
<RECEIVABLES> 1634
<ASSETS-OTHER> 93
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1040721
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 4042
<TOTAL-LIABILITIES> 4042
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1036679
<SHARES-COMMON-STOCK> 820670
<SHARES-COMMON-PRIOR> 35775
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 820670
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 26376
<OTHER-INCOME> 0
<EXPENSES-NET> 1400
<NET-INVESTMENT-INCOME> 24976
<REALIZED-GAINS-CURRENT> 10
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 24986
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 17406
<DISTRIBUTIONS-OF-GAINS> 5
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2152976
<NUMBER-OF-SHARES-REDEEMED> 1371965
<SHARES-REINVESTED> 3884
<NET-CHANGE-IN-ASSETS> 784895
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 321
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 493
<AVERAGE-NET-ASSETS> 321174
<PER-SHARE-NAV-BEGIN> 1.000
<PER-SHARE-NII> 0.050
<PER-SHARE-GAIN-APPREC> 0.000
<PER-SHARE-DIVIDEND> 0.050
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 1.000
<EXPENSE-RATIO> 0.150
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31,1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 153
<NAME> JANUS GOVT MONEY MARKET FUND - SERVICE SHARES
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 1038994
<INVESTMENTS-AT-VALUE> 1038994
<RECEIVABLES> 1634
<ASSETS-OTHER> 93
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1040721
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 4042
<TOTAL-LIABILITIES> 4042
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1036679
<SHARES-COMMON-STOCK> 2770
<SHARES-COMMON-PRIOR> 628
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 2770
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 26376
<OTHER-INCOME> 0
<EXPENSES-NET> 1400
<NET-INVESTMENT-INCOME> 24976
<REALIZED-GAINS-CURRENT> 10
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 24986
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 33
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2772
<NUMBER-OF-SHARES-REDEEMED> 658
<SHARES-REINVESTED> 28
<NET-CHANGE-IN-ASSETS> 2142
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 14
<AVERAGE-NET-ASSETS> 639
<PER-SHARE-NAV-BEGIN> 1.000
<PER-SHARE-NII> 0.050
<PER-SHARE-GAIN-APPREC> 0.000
<PER-SHARE-DIVIDEND> 0.050
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 1.000
<EXPENSE-RATIO> 0.400
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 161
<NAME> JANUS TAX EXEMPT MONEY MARKET FUND - INVESTOR SHARES
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 165882
<INVESTMENTS-AT-VALUE> 165882
<RECEIVABLES> 8451
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 174333
<PAYABLE-FOR-SECURITIES> 9701
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 606
<TOTAL-LIABILITIES> 10307
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 164026
<SHARES-COMMON-STOCK> 105011
<SHARES-COMMON-PRIOR> 81269
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 105011
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 4261
<OTHER-INCOME> 0
<EXPENSES-NET> 597
<NET-INVESTMENT-INCOME> 3664
<REALIZED-GAINS-CURRENT> 26
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 3690
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 2879
<DISTRIBUTIONS-OF-GAINS> 21
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 330543
<NUMBER-OF-SHARES-REDEEMED> 309566
<SHARES-REINVESTED> 2765
<NET-CHANGE-IN-ASSETS> 23742
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 91
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 555
<AVERAGE-NET-ASSETS> 91058
<PER-SHARE-NAV-BEGIN> 1.000
<PER-SHARE-NII> 0.030
<PER-SHARE-GAIN-APPREC> 0.000
<PER-SHARE-DIVIDEND> 0.030
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 1.000
<EXPENSE-RATIO> 0.600
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 162
<NAME> JANUS TAX EXEMPT MONEY MARKET FUND - INSTITUTIONAL SHARES
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 165882
<INVESTMENTS-AT-VALUE> 165882
<RECEIVABLES> 8451
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 174333
<PAYABLE-FOR-SECURITIES> 9701
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 606
<TOTAL-LIABILITIES> 10307
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 164026
<SHARES-COMMON-STOCK> 41319
<SHARES-COMMON-PRIOR> 3559
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 41319
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 4261
<OTHER-INCOME> 0
<EXPENSES-NET> 597
<NET-INVESTMENT-INCOME> 3664
<REALIZED-GAINS-CURRENT> 26
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 3690
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 678
<DISTRIBUTIONS-OF-GAINS> 3
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 211444
<NUMBER-OF-SHARES-REDEEMED> 174273
<SHARES-REINVESTED> 589
<NET-CHANGE-IN-ASSETS> 37760
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 19
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 38
<AVERAGE-NET-ASSETS> 18859
<PER-SHARE-NAV-BEGIN> 1.000
<PER-SHARE-NII> 0.040
<PER-SHARE-GAIN-APPREC> 0.000
<PER-SHARE-DIVIDEND> 0.040
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 1.000
<EXPENSE-RATIO> 0.150
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 163
<NAME> JANUS TAX EXEMPT MONEY MARKET FUND - SERVICE SHARES
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 165882
<INVESTMENTS-AT-VALUE> 165882
<RECEIVABLES> 8451
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 174333
<PAYABLE-FOR-SECURITIES> 9701
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 606
<TOTAL-LIABILITIES> 10307
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 164026
<SHARES-COMMON-STOCK> 17696
<SHARES-COMMON-PRIOR> 10
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 17696
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 4261
<OTHER-INCOME> 0
<EXPENSES-NET> 597
<NET-INVESTMENT-INCOME> 3664
<REALIZED-GAINS-CURRENT> 26
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 3690
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 107
<DISTRIBUTIONS-OF-GAINS> 2
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 38120
<NUMBER-OF-SHARES-REDEEMED> 20544
<SHARES-REINVESTED> 110
<NET-CHANGE-IN-ASSETS> 17686
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 22
<AVERAGE-NET-ASSETS> 3215
<PER-SHARE-NAV-BEGIN> 1.000
<PER-SHARE-NII> 0.030
<PER-SHARE-GAIN-APPREC> 0.000
<PER-SHARE-DIVIDEND> 0.030
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 1.000
<EXPENSE-RATIO> 0.400
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 017
<NAME> JANUS HIGH-YIELD FUND
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 292300
<INVESTMENTS-AT-VALUE> 270339
<RECEIVABLES> 13946
<ASSETS-OTHER> 365
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 284650
<PAYABLE-FOR-SECURITIES> 15067
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1366
<TOTAL-LIABILITIES> 16433
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 291286
<SHARES-COMMON-STOCK> 26156
<SHARES-COMMON-PRIOR> 25471
<ACCUMULATED-NII-CURRENT> 6
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1101
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 21962
<NET-ASSETS> 268217
<DIVIDEND-INCOME> 252
<INTEREST-INCOME> 33298
<OTHER-INCOME> 0
<EXPENSES-NET> 3662
<NET-INVESTMENT-INCOME> 29888
<REALIZED-GAINS-CURRENT> 1034
<APPREC-INCREASE-CURRENT> 28168
<NET-CHANGE-FROM-OPS> 686
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 29888
<DISTRIBUTIONS-OF-GAINS> 16609
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 43131
<NUMBER-OF-SHARES-REDEEMED> 46003
<SHARES-REINVESTED> 3557
<NET-CHANGE-IN-ASSETS> 33205
<ACCUMULATED-NII-PRIOR> 142
<ACCUMULATED-GAINS-PRIOR> 16395
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2773
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 3783
<AVERAGE-NET-ASSETS> 380942
<PER-SHARE-NAV-BEGIN> 11.830
<PER-SHARE-NII> 0.900
<PER-SHARE-GAIN-APPREC> 1.020
<PER-SHARE-DIVIDEND> 0.900
<PER-SHARE-DISTRIBUTIONS> 0.560
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 10.250
<EXPENSE-RATIO> 0.990
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirely by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 018
<NAME> JANUS OLYMPUS FUND
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 683632
<INVESTMENTS-AT-VALUE> 951517
<RECEIVABLES> 16163
<ASSETS-OTHER> 1074
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 968754
<PAYABLE-FOR-SECURITIES> 17617
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 3643
<TOTAL-LIABILITIES> 21260
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 685433
<SHARES-COMMON-STOCK> 43666
<SHARES-COMMON-PRIOR> 33441
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 5261
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 267322
<NET-ASSETS> 947494
<DIVIDEND-INCOME> 3174
<INTEREST-INCOME> 2771
<OTHER-INCOME> 0
<EXPENSES-NET> 7580
<NET-INVESTMENT-INCOME> 1635
<REALIZED-GAINS-CURRENT> 4017
<APPREC-INCREASE-CURRENT> 150137
<NET-CHANGE-FROM-OPS> 144485
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 1358
<DISTRIBUTIONS-OF-GAINS> 24652
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 32029
<NUMBER-OF-SHARES-REDEEMED> 23295
<SHARES-REINVESTED> 1491
<NET-CHANGE-IN-ASSETS> 331843
<ACCUMULATED-NII-PRIOR> 1267
<ACCUMULATED-GAINS-PRIOR> 23497
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 5434
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 7828
<AVERAGE-NET-ASSETS> 774434
<PER-SHARE-NAV-BEGIN> 18.410
<PER-SHARE-NII> 0.000
<PER-SHARE-GAIN-APPREC> 4.050
<PER-SHARE-DIVIDEND> 0.040
<PER-SHARE-DISTRIBUTIONS> 0.720
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 21.700
<EXPENSE-RATIO> 1.010
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 019
<NAME> JANUS EQUITY INCOME FUND
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 177256
<INVESTMENTS-AT-VALUE> 198519
<RECEIVABLES> 4776
<ASSETS-OTHER> 671
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 203966
<PAYABLE-FOR-SECURITIES> 2238
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 946
<TOTAL-LIABILITIES> 3184
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 175807
<SHARES-COMMON-STOCK> 12875
<SHARES-COMMON-PRIOR> 5317
<ACCUMULATED-NII-CURRENT> 474
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 3236
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 21265
<NET-ASSETS> 200782
<DIVIDEND-INCOME> 1492
<INTEREST-INCOME> 633
<OTHER-INCOME> 0
<EXPENSES-NET> 1582
<NET-INVESTMENT-INCOME> 543
<REALIZED-GAINS-CURRENT> 3247
<APPREC-INCREASE-CURRENT> 13912
<NET-CHANGE-FROM-OPS> 17702
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 233
<DISTRIBUTIONS-OF-GAINS> 5097
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 15102
<NUMBER-OF-SHARES-REDEEMED> 7952
<SHARES-REINVESTED> 408
<NET-CHANGE-IN-ASSETS> 126457
<ACCUMULATED-NII-PRIOR> 87
<ACCUMULATED-GAINS-PRIOR> 5163
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1002
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1615
<AVERAGE-NET-ASSETS> 133613
<PER-SHARE-NAV-BEGIN> 13.980
<PER-SHARE-NII> 0.050
<PER-SHARE-GAIN-APPREC> 2.470
<PER-SHARE-DIVIDEND> 0.030
<PER-SHARE-DISTRIBUTIONS> 0.880
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 15.590
<EXPENSE-RATIO> 1.210
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from financial
"statements dated October 31, 1998 included in the Fund's Annual Report and is"
qualified in its entirety by reference to such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 020
<NAME> JANUS SPECIAL SITUATIONS FUND
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1.000
<INVESTMENTS-AT-COST> 747176
<INVESTMENTS-AT-VALUE> 789582
<RECEIVABLES> 8387
<ASSETS-OTHER> 555
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 798524
<PAYABLE-FOR-SECURITIES> 9884
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2323
<TOTAL-LIABILITIES> 12207
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 745046
<SHARES-COMMON-STOCK> 53972
<SHARES-COMMON-PRIOR> 23704
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1103
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 42374
<NET-ASSETS> 786317
<DIVIDEND-INCOME> 3267
<INTEREST-INCOME> 757
<OTHER-INCOME> 0
<EXPENSES-NET> 7511
<NET-INVESTMENT-INCOME> 3487
<REALIZED-GAINS-CURRENT> 2070
<APPREC-INCREASE-CURRENT> 9074
<NET-CHANGE-FROM-OPS> 3517
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 17012
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 59478
<NUMBER-OF-SHARES-REDEEMED> 30431
<SHARES-REINVESTED> 1221
<NET-CHANGE-IN-ASSETS> 452540
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 17997
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 5040
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 7722
<AVERAGE-NET-ASSETS> 716123
<PER-SHARE-NAV-BEGIN> 14.080
<PER-SHARE-NII> 0.000
<PER-SHARE-GAIN-APPREC> 1.150
<PER-SHARE-DIVIDEND> 0.000
<PER-SHARE-DISTRIBUTIONS> 0.660
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 14.570
<EXPENSE-RATIO> 1.080
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
