<PAGE> PAGE 1
000 B000000 12/31/97
000 C000000 752372
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 A
001 A000000 SELIGMAN HIGH INCOME FUND SERIES
001 B000000 811-4103
001 C000000 2128501864
002 A000000 100 PARK AVENUE
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10017
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 Y
007 B000000 2
007 C010100 1
007 C020100 U.S. GOVERNMENT SECURITIES SERIES
007 C030100 N
007 C010200 2
007 C010300 3
007 C020300 HIGH-YIELD BOND SERIES
007 C030300 N
007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
008 A00AA01 J. & W. SELIGMAN & CO. INC.
008 B00AA01 A
008 C00AA01 801-15798
008 D01AA01 NEW YORK
008 D02AA01 NY
008 D03AA01 10017
011 A00AA01 SELIGMAN FINANCIAL SERVICES, INC.
011 B00AA01 8-25845
011 C01AA01 NEW YORK
011 C02AA01 NY
011 C03AA01 10017
012 A00AA01 SELIGMAN DATA CORP.
012 B00AA01 84-1895
012 C01AA01 NEW YORK
012 C02AA01 NY
<PAGE> PAGE 2
012 C03AA01 10017
013 A00AA01 DELOITTE & TOUCHE LLP
013 B01AA01 NEW YORK
013 B02AA01 NY
013 B03AA01 10281
014 A00AA01 SELIGMAN SERVICES, INC.
014 B00AA01 8-47717
015 A00AA01 INVESTORS FIDUCIARY TRUST COMPANY
015 B00AA01 C
015 C01AA01 KANSAS CITY
015 C02AA01 MO
015 C03AA01 64105
015 C04AA01 1716
015 E01AA01 X
015 A00AA02 CHASE MANHATTAN BANK
015 B00AA02 S
015 C01AA02 NEW YORK
015 C02AA02 NY
015 C03AA02 10036
015 E06AA02 X
018 00AA00 Y
019 A00AA00 Y
019 B00AA00 50
019 C00AA00 JWSELIGMAN
020 C000001 0
020 C000002 0
020 C000003 0
020 C000004 0
020 C000005 0
020 C000006 0
020 C000007 0
020 C000008 0
020 C000009 0
020 C000010 0
021 000000 0
022 A000001 CANADIAN IMPERIAL BK OF COMMERCE-GRAND CAYMAN
022 B000001 13-1942440
022 C000001 1207242
022 D000001 30625
022 A000002 BANK OF MONTREAL-TORONTO
022 B000002 13-4941926
022 C000002 1212225
022 D000002 0
022 A000003 HSBC SECURITIES, INC.
022 B000003 13-2650272
022 C000003 1179291
022 D000003 10057
022 A000004 NATIONAL WESTMINSTER BANK-GRAND CAYMAN
022 B000004 13-5634601
022 C000004 1157385
022 D000004 0
<PAGE> PAGE 3
022 A000005 UBS-GRAND CAYMAN
022 B000005 13-2795530
022 C000005 1138451
022 D000005 2764
022 A000006 FIRST NATIONAL BANK OF CHICAGO-GRAND CAYMAN
022 B000006 36-0899825
022 C000006 1014835
022 D000006 1985
022 A000007 DONALDSON, LUFKIN & JENRETTE SECURITIES CORP.
022 B000007 13-2741729
022 C000007 481664
022 D000007 239574
022 A000008 ABN-AMRO BANK-GRAND CAYMAN
022 B000008 13-5268975
022 C000008 526850
022 D000008 0
022 A000009 REPUBLIC NATIONAL BK OF NEW YORK-GRAND CAYMAN
022 B000009 13-2774726
022 C000009 524555
022 D000009 0
022 A000010 BAYERISCHE VEREINSBANK-GRAND CAYMAN
022 B000010 13-2774123
022 C000010 424150
022 D000010 0
023 C000000 10745696
023 D000000 869711
024 00AA00 N
025 D00AA01 0
025 D00AA02 0
025 D00AA03 0
025 D00AA04 0
025 D00AA05 0
025 D00AA06 0
025 D00AA07 0
025 D00AA08 0
026 A000000 Y
026 B000000 Y
026 C000000 Y
026 D000000 Y
026 E000000 N
026 F000000 Y
026 G010000 N
026 G020000 N
026 H000000 Y
027 000000 Y
037 00AA00 N
038 00AA00 0
039 00AA00 N
040 00AA00 Y
041 00AA00 Y
049 00AA00 N
<PAGE> PAGE 4
050 00AA00 N
051 00AA00 N
052 00AA00 N
053 A00AA00 N
054 A00AA00 Y
054 B00AA00 Y
054 C00AA00 N
054 D00AA00 N
054 E00AA00 N
054 F00AA00 N
054 G00AA00 Y
054 H00AA00 Y
054 I00AA00 N
054 J00AA00 Y
054 K00AA00 N
054 L00AA00 N
054 M00AA00 Y
054 N00AA00 N
054 O00AA00 Y
058 A00AA00 N
059 00AA00 Y
060 A00AA00 Y
060 B00AA00 Y
061 00AA00 1000
066 A00AA00 N
067 00AA00 N
068 A00AA00 N
068 B00AA00 N
069 00AA00 N
077 A000000 Y
077 B000000 Y
077 C000000 N
077 D000000 N
077 E000000 N
077 F000000 N
077 G000000 N
077 H000000 N
077 I000000 N
077 J000000 N
077 K000000 N
077 L000000 N
077 M000000 N
077 N000000 N
077 O000000 N
077 P000000 N
077 Q010000 Y
077 Q020000 N
077 Q030000 N
078 000000 N
080 A00AA00 ICI MUTUAL INSURANCE COMPANY
080 C00AA00 22000
<PAGE> PAGE 5
081 A00AA00 Y
081 B00AA00 56
082 A00AA00 Y
082 B00AA00 150
083 A00AA00 N
083 B00AA00 0
084 A00AA00 N
084 B00AA00 0
085 A00AA00 Y
085 B00AA00 N
086 A010000 0
086 A020000 0
086 B010000 0
086 B020000 0
086 C010000 0
086 C020000 0
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
028 A010100 739
028 A020100 129
028 A030100 0
028 A040100 1292
028 B010100 1767
028 B020100 139
028 B030100 0
028 B040100 852
028 C010100 1056
028 C020100 136
028 C030100 0
028 C040100 911
028 D010100 5423
028 D020100 150
028 D030100 0
028 D040100 1422
028 E010100 8692
028 E020100 146
028 E030100 0
028 E040100 7392
028 F010100 9134
028 F020100 151
028 F030100 0
028 F040100 8448
028 G010100 26811
028 G020100 851
028 G030100 0
028 G040100 20317
028 H000100 419
<PAGE> PAGE 6
029 000100 Y
030 A000100 41
030 B000100 4.75
030 C000100 0.00
031 A000100 5
031 B000100 0
032 000100 35
033 000100 1
034 000100 Y
035 000100 8
036 A000100 N
036 B000100 0
042 A000100 0
042 B000100 0
042 C000100 0
042 D000100 100
042 E000100 0
042 F000100 0
042 G000100 0
042 H000100 0
043 000100 197
044 000100 0
045 000100 Y
046 000100 N
047 000100 Y
048 000100 0.500
048 A010100 0
048 A020100 0.000
048 B010100 0
048 B020100 0.000
048 C010100 0
048 C020100 0.000
048 D010100 0
048 D020100 0.000
048 E010100 0
048 E020100 0.000
048 F010100 0
048 F020100 0.000
048 G010100 0
048 G020100 0.000
048 H010100 0
048 H020100 0.000
048 I010100 0
048 I020100 0.000
048 J010100 0
048 J020100 0.000
048 K010100 0
048 K020100 0.000
055 A000100 N
055 B000100 N
056 000100 Y
<PAGE> PAGE 7
057 000100 N
062 A000100 Y
062 B000100 0.0
062 C000100 0.0
062 D000100 6.0
062 E000100 0.0
062 F000100 0.0
062 G000100 0.0
062 H000100 0.0
062 I000100 0.0
062 J000100 0.0
062 K000100 0.0
062 L000100 -2.6
062 M000100 60.4
062 N000100 36.2
062 O000100 0.0
062 P000100 0.0
062 Q000100 0.0
062 R000100 0.0
063 A000100 0
063 B000100 21.7
064 A000100 N
064 B000100 N
070 A010100 Y
070 A020100 Y
070 B010100 N
070 B020100 N
070 C010100 Y
070 C020100 N
070 D010100 N
070 D020100 N
070 E010100 Y
070 E020100 N
070 F010100 N
070 F020100 N
070 G010100 Y
070 G020100 N
070 H010100 N
070 H020100 N
070 I010100 N
070 I020100 N
070 J010100 Y
070 J020100 N
070 K010100 N
070 K020100 N
070 L010100 N
070 L020100 N
070 M010100 N
070 M020100 N
070 N010100 Y
070 N020100 N
<PAGE> PAGE 8
070 O010100 N
070 O020100 N
070 P010100 Y
070 P020100 N
070 Q010100 N
070 Q020100 N
070 R010100 N
070 R020100 N
071 A000100 99697
071 B000100 95958
071 C000100 49488
071 D000100 194
072 A000100 12
072 B000100 3758
072 C000100 0
072 D000100 0
072 E000100 0
072 F000100 272
072 G000100 0
072 H000100 0
072 I000100 118
072 J000100 19
072 K000100 11
072 L000100 50
072 M000100 9
072 N000100 51
072 O000100 1
072 P000100 0
072 Q000100 0
072 R000100 8
072 S000100 1
072 T000100 197
072 U000100 0
072 V000100 0
072 W000100 8
072 X000100 745
072 Y000100 0
072 Z000100 3013
072AA000100 480
072BB000100 1092
072CC010100 1950
072CC020100 0
072DD010100 2523
072DD020100 445
072EE000100 0
073 A010100 0.3808
073 A020100 0.3291
073 B000100 0.0000
073 C000100 0.0000
074 A000100 30
074 B000100 3671
<PAGE> PAGE 9
074 C000100 0
074 D000100 58884
074 E000100 0
074 F000100 0
074 G000100 0
074 H000100 0
074 I000100 0
074 J000100 0
074 K000100 10
074 L000100 798
074 M000100 20
074 N000100 63413
074 O000100 0
074 P000100 71
074 Q000100 0
074 R010100 0
074 R020100 0
074 R030100 0
074 R040100 2347
074 S000100 0
074 T000100 60995
074 U010100 6606
074 U020100 1793
074 V010100 6.88
074 V020100 6.89
074 W000100 0.0000
074 X000100 3142
074 Y000100 0
075 A000100 0
075 B000100 54754
076 000100 0.00
028 A010300 103314
028 A020300 5275
028 A030300 0
028 A040300 21436
028 B010300 97996
028 B020300 5756
028 B030300 0
028 B040300 24274
028 C010300 98974
028 C020300 6078
028 C030300 0
028 C040300 20013
028 D010300 122185
028 D020300 6636
028 D030300 0
028 D040300 60155
028 E010300 125715
028 E020300 6160
028 E030300 0
028 E040300 36277
<PAGE> PAGE 10
028 F010300 142124
028 F020300 6775
028 F030300 0
028 F040300 51000
028 G010300 690308
028 G020300 36680
028 G030300 0
028 G040300 213155
028 H000300 112150
029 000300 Y
030 A000300 9143
030 B000300 4.75
030 C000300 0.00
031 A000300 1048
031 B000300 0
032 000300 8055
033 000300 40
034 000300 Y
035 000300 843
036 A000300 N
036 B000300 0
042 A000300 0
042 B000300 0
042 C000300 1
042 D000300 99
042 E000300 0
042 F000300 0
042 G000300 0
042 H000300 0
043 000300 8911
044 000300 0
045 000300 Y
046 000300 N
047 000300 Y
048 000300 0.000
048 A010300 1000000
048 A020300 0.650
048 B010300 0
048 B020300 0.000
048 C010300 0
048 C020300 0.000
048 D010300 0
048 D020300 0.000
048 E010300 0
048 E020300 0.000
048 F010300 0
048 F020300 0.000
048 G010300 0
048 G020300 0.000
048 H010300 0
048 H020300 0.000
<PAGE> PAGE 11
048 I010300 0
048 I020300 0.000
048 J010300 0
048 J020300 0.000
048 K010300 1000000
048 K020300 0.550
055 A000300 N
055 B000300 N
056 000300 Y
057 000300 N
062 A000300 Y
062 B000300 0.0
062 C000300 0.0
062 D000300 0.0
062 E000300 0.0
062 F000300 0.0
062 G000300 0.0
062 H000300 0.0
062 I000300 0.0
062 J000300 3.4
062 K000300 0.0
062 L000300 2.4
062 M000300 0.0
062 N000300 0.0
062 O000300 0.0
062 P000300 88.9
062 Q000300 5.3
062 R000300 0.0
063 A000300 0
063 B000300 8.3
064 A000300 N
064 B000300 N
070 A010300 Y
070 A020300 N
070 B010300 N
070 B020300 N
070 C010300 N
070 C020300 N
070 D010300 N
070 D020300 N
070 E010300 Y
070 E020300 N
070 F010300 N
070 F020300 N
070 G010300 N
070 G020300 N
070 H010300 N
070 H020300 N
070 I010300 N
070 I020300 N
070 J010300 Y
<PAGE> PAGE 12
070 J020300 Y
070 K010300 N
070 K020300 N
070 L010300 Y
070 L020300 Y
070 M010300 Y
070 M020300 N
070 N010300 Y
070 N020300 N
070 O010300 Y
070 O020300 N
070 P010300 Y
070 P020300 N
070 Q010300 N
070 Q020300 N
070 R010300 N
070 R020300 N
071 A000300 1686932
071 B000300 780115
071 C000300 1262672
071 D000300 62
072 A000300 12
072 B000300 133943
072 C000300 5554
072 D000300 0
072 E000300 0
072 F000300 8248
072 G000300 0
072 H000300 0
072 I000300 2372
072 J000300 242
072 K000300 120
072 L000300 125
072 M000300 21
072 N000300 558
072 O000300 1
072 P000300 0
072 Q000300 0
072 R000300 60
072 S000300 30
072 T000300 8911
072 U000300 0
072 V000300 0
072 W000300 40
072 X000300 20728
072 Y000300 0
072 Z000300 118769
072AA000300 26645
072BB000300 17981
072CC010300 47952
072CC020300 0
<PAGE> PAGE 13
072DD010300 52770
072DD020300 33770
072EE000300 0
073 A010300 0.6838
073 A020300 0.6277
073 B000300 0.0000
073 C000300 0.0000
074 A000300 2434
074 B000300 0
074 C000300 64100
074 D000300 1758354
074 E000300 0
074 F000300 0
074 G000300 0
074 H000300 0
074 I000300 0
074 J000300 0
074 K000300 241
074 L000300 58177
074 M000300 65
074 N000300 1883371
074 O000300 2306
074 P000300 1174
074 Q000300 0
074 R010300 0
074 R020300 0
074 R030300 0
074 R040300 13197
074 S000300 0
074 T000300 1866694
074 U010300 99415
074 U020300 70847
074 V010300 7.55
074 V020300 7.55
074 W000300 0.0000
074 X000300 52932
074 Y000300 0
075 A000300 0
075 B000300 1320264
076 000300 0.00
SIGNATURE THOMAS G. ROSE
TITLE TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 011
<NAME> SELIGMAN U.S.GOVERNMENT SECURITIES CLASS A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1997
<PERIOD-END> DEC-31-1997
<INVESTMENTS-AT-COST> 60292
<INVESTMENTS-AT-VALUE> 62555
<RECEIVABLES> 808
<ASSETS-OTHER> 50
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 63413
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2418
<TOTAL-LIABILITIES> 2418
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 72991
<SHARES-COMMON-STOCK> 6606<F1>
<SHARES-COMMON-PRIOR> 6984<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (14259)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2263
<NET-ASSETS> 45426<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 3067<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (544)<F1>
<NET-INVESTMENT-INCOME> 2523<F1>
<REALIZED-GAINS-CURRENT> (612)
<APPREC-INCREASE-CURRENT> 1950
<NET-CHANGE-FROM-OPS> 4351
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2523)<F1>
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2402<F1>
<NUMBER-OF-SHARES-REDEEMED> (2983)<F1>
<SHARES-REINVESTED> 203<F1>
<NET-CHANGE-IN-ASSETS> 4823
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (15178)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 222<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 544<F1>
<AVERAGE-NET-ASSETS> 44386<F1>
<PER-SHARE-NAV-BEGIN> 6.71<F1>
<PER-SHARE-NII> .38<F1>
<PER-SHARE-GAIN-APPREC> .17<F1>
<PER-SHARE-DIVIDEND> (.38)<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0<F1>
<PER-SHARE-NAV-END> 6.88<F1>
<EXPENSE-RATIO> 1.23<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class A only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 012
<NAME> SELIGMAN U.S.GOVERNMENT SECURITIES CLASS B
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1997
<PERIOD-END> DEC-31-1997
<INVESTMENTS-AT-COST> 60292
<INVESTMENTS-AT-VALUE> 62555
<RECEIVABLES> 808
<ASSETS-OTHER> 50
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 63413
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2418
<TOTAL-LIABILITIES> 2418
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 72991
<SHARES-COMMON-STOCK> 467<F1>
<SHARES-COMMON-PRIOR> 0<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (14259)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2263
<NET-ASSETS> 3219<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 63<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (18)<F1>
<NET-INVESTMENT-INCOME> 45<F1>
<REALIZED-GAINS-CURRENT> (612)
<APPREC-INCREASE-CURRENT> 1950
<NET-CHANGE-FROM-OPS> 4351
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (45)<F1>
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 757<F1>
<NUMBER-OF-SHARES-REDEEMED> (295)<F1>
<SHARES-REINVESTED> 5<F1>
<NET-CHANGE-IN-ASSETS> 4823
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (15178)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 5<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 19<F1>
<AVERAGE-NET-ASSETS> 947<F1>
<PER-SHARE-NAV-BEGIN> 6.73<F1>
<PER-SHARE-NII> .33<F1>
<PER-SHARE-GAIN-APPREC> .16<F1>
<PER-SHARE-DIVIDEND> (.33)<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0<F1>
<PER-SHARE-NAV-END> 6.89<F1>
<EXPENSE-RATIO> 2.01<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class B only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 014
<NAME> SELIGMAN U.S.GOVERNMENT SECURITIES CLASS D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1997
<PERIOD-END> DEC-31-1997
<INVESTMENTS-AT-COST> 60292
<INVESTMENTS-AT-VALUE> 62555
<RECEIVABLES> 808
<ASSETS-OTHER> 50
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 63413
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2418
<TOTAL-LIABILITIES> 2418
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 72991
<SHARES-COMMON-STOCK> 1793<F1>
<SHARES-COMMON-PRIOR> 1380<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (14259)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2263
<NET-ASSETS> 12350<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 628<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (183)<F1>
<NET-INVESTMENT-INCOME> 445<F1>
<REALIZED-GAINS-CURRENT> (612)
<APPREC-INCREASE-CURRENT> 1950
<NET-CHANGE-FROM-OPS> 4351
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (445)<F1>
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1790<F1>
<NUMBER-OF-SHARES-REDEEMED> (1420)<F1>
<SHARES-REINVESTED> 43<F1>
<NET-CHANGE-IN-ASSETS> 4823
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (15178)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 45<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 183<F1>
<AVERAGE-NET-ASSETS> 9064<F1>
<PER-SHARE-NAV-BEGIN> 6.73<F1>
<PER-SHARE-NII> .33<F1>
<PER-SHARE-GAIN-APPREC> .16<F1>
<PER-SHARE-DIVIDEND> (.33)<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0<F1>
<PER-SHARE-NAV-END> 6.89<F1>
<EXPENSE-RATIO> 2.01<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 031
<NAME> SELIGMAN HIGH-YIELD BOND SERIES CL. A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1997
<PERIOD-END> DEC-31-1997
<INVESTMENTS-AT-COST> 1752627
<INVESTMENTS-AT-VALUE> 1822454
<RECEIVABLES> 58418
<ASSETS-OTHER> 2499
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1883371
<PAYABLE-FOR-SECURITIES> 2306
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 14371
<TOTAL-LIABILITIES> 16677
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1789217
<SHARES-COMMON-STOCK> 99415<F1>
<SHARES-COMMON-PRIOR> 56292<F1>
<ACCUMULATED-NII-CURRENT> 2353
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 5297
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 69827
<NET-ASSETS> 750461<F1>
<DIVIDEND-INCOME> 2397<F1>
<INTEREST-INCOME> 57798<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (6482)<F1>
<NET-INVESTMENT-INCOME> 53713<F1>
<REALIZED-GAINS-CURRENT> 8664
<APPREC-INCREASE-CURRENT> 47952
<NET-CHANGE-FROM-OPS> 175385
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (52770)<F1>
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 68525<F1>
<NUMBER-OF-SHARES-REDEEMED> (29178)<F1>
<SHARES-REINVESTED> 3776<F1>
<NET-CHANGE-IN-ASSETS> 1044892
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (3367)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3570<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 6482<F1>
<AVERAGE-NET-ASSETS> 569722<F1>
<PER-SHARE-NAV-BEGIN> 7.25<F1>
<PER-SHARE-NII> .70<F1>
<PER-SHARE-GAIN-APPREC> .28<F1>
<PER-SHARE-DIVIDEND> (.68)<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0<F1>
<PER-SHARE-NAV-END> 7.55<F1>
<EXPENSE-RATIO> 1.14<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class A only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 032
<NAME> SELIGMAN HIGH-YIELD BOND SERIES CL. B
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1997
<PERIOD-END> DEC-31-1997
<INVESTMENTS-AT-COST> 1752627
<INVESTMENTS-AT-VALUE> 1822454
<RECEIVABLES> 58418
<ASSETS-OTHER> 2499
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1883371
<PAYABLE-FOR-SECURITIES> 2306
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 14371
<TOTAL-LIABILITIES> 16677
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1789217
<SHARES-COMMON-STOCK> 76978<F1>
<SHARES-COMMON-PRIOR> 20394<F1>
<ACCUMULATED-NII-CURRENT> 2353
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 5297
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 69827
<NET-ASSETS> 581235<F1>
<DIVIDEND-INCOME> 1487<F1>
<INTEREST-INCOME> 35853<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (6708)<F1>
<NET-INVESTMENT-INCOME> 30632<F1>
<REALIZED-GAINS-CURRENT> 8664
<APPREC-INCREASE-CURRENT> 47952
<NET-CHANGE-FROM-OPS> 175385
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (29875)<F1>
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 61362<F1>
<NUMBER-OF-SHARES-REDEEMED> (6604)<F1>
<SHARES-REINVESTED> 1826<F1>
<NET-CHANGE-IN-ASSETS> 1044892
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (3367)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2191<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 6708<F1>
<AVERAGE-NET-ASSETS> 353535<F1>
<PER-SHARE-NAV-BEGIN> 7.26<F1>
<PER-SHARE-NII> .64<F1>
<PER-SHARE-GAIN-APPREC> .28<F1>
<PER-SHARE-DIVIDEND> (.63)<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0<F1>
<PER-SHARE-NAV-END> 7.55<F1>
<EXPENSE-RATIO> 1.90<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class B only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 034
<NAME> SELIGMAN HIGH-YIELD BOND SERIES CL. D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1997
<PERIOD-END> DEC-31-1997
<INVESTMENTS-AT-COST> 1752627
<INVESTMENTS-AT-VALUE> 1822454
<RECEIVABLES> 58418
<ASSETS-OTHER> 2499
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1883371
<PAYABLE-FOR-SECURITIES> 2306
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 14371
<TOTAL-LIABILITIES> 16677
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1789217
<SHARES-COMMON-STOCK> 70847<F1>
<SHARES-COMMON-PRIOR> 36597<F1>
<ACCUMULATED-NII-CURRENT> 2353
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 5297
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 69827
<NET-ASSETS> 534998<F1>
<DIVIDEND-INCOME> 1670<F1>
<INTEREST-INCOME> 40292<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (7538)<F1>
<NET-INVESTMENT-INCOME> 34424<F1>
<REALIZED-GAINS-CURRENT> 8664
<APPREC-INCREASE-CURRENT> 47952
<NET-CHANGE-FROM-OPS> 175385
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (33771)<F1>
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 44411<F1>
<NUMBER-OF-SHARES-REDEEMED> (12966)<F1>
<SHARES-REINVESTED> 2805<F1>
<NET-CHANGE-IN-ASSETS> 1044892
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (3367)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2487<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 7538<F1>
<AVERAGE-NET-ASSETS> 397502<F1>
<PER-SHARE-NAV-BEGIN> 7.26<F1>
<PER-SHARE-NII> .64<F1>
<PER-SHARE-GAIN-APPREC> .28<F1>
<PER-SHARE-DIVIDEND> (.63)<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0<F1>
<PER-SHARE-NAV-END> 7.55<F1>
<EXPENSE-RATIO> 1.90<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
INDEPENDENT AUDITORS' REPORT
The Board of Trustees
Seligman High Income Fund Series
In planning and performing our audit of the financial statements of Seligman
High Income Fund Series (the "Company") (including the U.S. Government
Securities Series and High-Yield Bond Series) for the year ended December 31,
1997 (on which we have issued our reports dated January 30, 1998), we considered
its internal control, including control activities for safeguarding securities,
in order to determine our auditing procedures for the purpose of expressing our
opinion on the financial statements and to comply with the requirements of Form
N-SAR, and not to provide assurance on the Company's internal control.
The management of the Company is responsible for establishing and maintaining
internal control. In fulfilling this responsibility, estimates and judgments by
management are required to assess the expected benefits and related costs of
controls. Generally, controls that are relevant to an audit pertain to the
entity's objective of preparing financial statements for external purposes that
are fairly presented in conformity with generally accepted accounting
principles. Those controls include the safeguarding of assets against
unauthorized acquisition, use, or disposition.
Because of inherent limitations in internal control, errors or fraud may occur
and not be detected. Also, projection of any evaluation of internal control to
future periods is subject to the risk that it may be become inadequate because
of changes in conditions or that the effectiveness of the design and operation
may deteriorate.
Our consideration of the Company's internal control would not necessarily
disclose all matters in internal control that might be material weaknesses under
standards established by the American Institute of Certified Public Accountants.
A material weakness is a condition in which the design or operation of one or
more of the internal control components does not reduce to a relatively low
level the risk that errors or fraud in amounts that would be material in
relation to the financial statements being audited may occur and not be detected
within a timely period by employees in the normal course of performing their
assigned functions. However, we noted no matters involving the Company's
internal control and its operation, including controls for safeguarding
securities, that we consider to be material weaknesses as defined above as of
December 31, 1997.
This report is intended solely for the information and use of management, the
Board of Trustees of Seligman High Income Fund Series, and the Securities and
Exchange Commission.
/s/Deloitte & Touche LLP
- ------------------------
Deloitte & Touche LLP
January 30, 1998
