<PAGE> PAGE 1
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000 C000000 0000701219
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001 A000000 CALVERT CASH RESERVES
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001 C000000 3019514881
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002 B000000 BETHESDA
002 C000000 MD
002 D010000 20814
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008 A00AA01 CALVERT ASSET MANAGEMENT COMPANY
008 B00AA01 A
008 C00AA01 801-17813
008 D01AA01 BETHESDA
008 D02AA01 MD
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011 B00AA01 8-47915
011 C01AA01 BETHESDA
011 C02AA01 MD
011 C03AA01 20814
011 C04AA01 9814
013 A00AA01 COOPERS & LYBRAND
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<PAGE> PAGE 2
022 A000001 DONALDSON, LUFKIN & JENNETTE
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022 A000002 STATE STREET BANK & TRUST CO DEALER DEPT
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022 C000003 339755
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022 A000004 LEHMAN BROS INC.
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022 A000005 FIRST CHICAGO CAPITAL MARKETS INC.
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<PAGE> PAGE 3
083 B00AA00 0
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<PAGE> PAGE 4
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<PAGE> PAGE 5
070 G010100 N
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<PAGE> PAGE 6
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<PAGE> PAGE 7
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<PAGE> PAGE 8
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SIGNATURE WILLIAM TARTIKOFF
TITLE GENERAL COUNSEL
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000701219
<NAME> CALVERT CASH RESERVES
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<NAME> INSTITUTIONAL PRIME FUND
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<S> <C>
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</TABLE>
