UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 13F Form 13F COVER PAGE Report for the Calendar Year or Quarter Ended: September 30, 2007 Check here if Amendment [ ]; Amendment Number: This Amendment (Check only one.): [ ] is a restatement. [ ] adds new holdings entries. Institutional Investment Manager Filing this Report: Name: The Bank of Nova Scotia Address: 40 King St. West Scotia Plaza 9th Floor Toronto, Ontario M5H 1H1 13F File Number: 28-11475 The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form. Person Signing this Report on Behalf of Reporting Manager: Name: Maria Theofilaktidis Title: Vice President, Financial Accounting and Controls Phone: 416-866-4269 Signature, Place, and Date of Signing: /s/ Maria Theofilaktidis Toronto, Ontario, Canada November 01, 2007 Report Type (Check only one.): [ ] 13F HOLDINGS REPORT. [ ] 13F NOTICE. [ X] 13F COMBINATION REPORT. List of Other Managers Reporting for this Manager: Form 13F File Number Name 28-11461 Scotia Capital Inc. 28-11460 Scotia Cassels Investment Counsel Ltd. 28-11459 Bank of Nova Scotia Trust Co. FORM 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: 1 Form13F Information Table Entry Total: 165 Form13F Information Table Value Total: $20,927,847 (thousands) List of Other Included Managers: Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional managers with respect to which this report is filed, other than the manager filing this report. No. 13F File Number Name 28-11472 BNS Investment Inc. FORM 13F INFORMATION TABLE VALUE SHARES/ SH/ PUT/ INVSTMT OTHER VOTING AUTHORITY NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DSCRETN MANAGERS SOLE SHARED NONE ------------------------------ ---------------- --------- -------- -------- --- ---- ------- ------------ -------- -------- -------- 3M CO COM 88579Y101 1522 16245 SH DEFINED 1 16245 0 0 ABER DIAMOND CORP COM 002893105 11755 300000 SH SOLE 300000 0 0 ABITIBI-CONSOLIDATED INC COM 003924107 7771 4392165 SH SOLE 4392165 0 0 AGNICO EAGLE MINES LTD COM 008474108 10384 209407 SH SOLE 209407 0 0 AGRIUM INC COM 008916108 11908 218636 SH SOLE 218636 0 0 ALCAN INC COM 013716105 246038 2466325 SH SOLE 2466325 0 0 ALCOA INC COM 013817101 660 16845 SH DEFINED 1 16845 0 0 ALTRIA GROUP INC COM 02209S103 1165 16745 SH DEFINED 1 16745 0 0 AMERICAN EXPRESS CO COM 025816109 995 16745 SH DEFINED 1 16745 0 0 AMERICAN INTL GROUP INC COM 026874107 1132 16715 SH DEFINED 1 16715 0 0 AMGEN INC COM 031162100 5657 100000 SH SOLE 100000 0 0 ANADARKO PETE CORP COM 032511107 8063 150000 SH SOLE 150000 0 0 ANHEUSER BUSCH COS INC COM 035229103 3749 75000 SH SOLE 75000 0 0 AT&T INC COM 00206R102 688 16245 SH DEFINED 1 16245 0 0 BALLARD PWR SYS INC COM 05858H104 310 63000 SH SOLE 63000 0 0 BANK MONTREAL QUE COM 063671101 1412648 21620040 SH SOLE 21620040 0 0 BANK OF AMERICA CORPORATION COM 060505104 17595 350000 SH SOLE 350000 0 0 BARRICK GOLD CORP COM 067901108 158749 3952988 SH SOLE 3952988 0 0 BCE INC COM NEW 05534B760 5635 140500 SH SOLE 1 140500 0 0 BCE INC COM NEW 05534B760 1386562 34570222 SH SOLE 34570222 0 0 BEST BUY INC COM 086516101 11505 250000 SH SOLE 250000 0 0 BIOVAIL CORP COM 09067J109 77693 4462422 SH SOLE 4462422 0 0 BOEING CO COM 097023105 1760 16745 SH DEFINED 1 16745 0 0 BRISTOL MYERS SQUIBB CO COM 110122108 2162 75000 SH SOLE 75000 0 0 BROADCOM CORP CL A 111320107 213 5854 SH DEFINED 1 0 5854 BROOKFIELD ASSET MGMT INC CL A LTD VT SH 112585104 706091 18412027 SH SOLE 18412027 0 0 BROOKFIELD PPTYS CORP COM 112900105 31381 1263885 SH SOLE 1263885 0 0 CAE INC COM 124765108 22456 1668357 SH SOLE 1668357 0 0 CAMECO CORP COM 13321L108 46396 1005939 SH SOLE 1005939 0 0 CANADIAN NAT RES LTD COM 136385101 208284 2742202 SH SOLE 2742202 0 0 CANADIAN NATL RY CO COM 136375102 411390 7210218 SH SOLE 7210218 0 0 CANADIAN PAC RY LTD COM 13645T100 56295 800028 SH SOLE 800028 0 0 CANETIC RES TR COM 137513107 9087 597500 SH SOLE 597500 0 0 CATERPILLAR INC DEL COM 149123101 1275 16240 SH DEFINED 1 16240 0 0 CDN IMPERIAL BK OF COMMERCE COM 136069101 1479049 14808356 SH SOLE 14808356 0 0 CELESTICA INC SUB VTG SHS 15101Q108 1899 311660 SH SOLE 311660 0 0 CEMEX SAB DE CV SPON ADR NEW 151290889 8976 300000 SH SOLE 300000 0 0 CHC HELICOPTER CORP CL A SUB VTG 12541C203 29462 1170000 SH SOLE 1170000 0 0 CHESAPEAKE ENERGY CORP COM 165167107 3526 100000 SH SOLE 100000 0 0 CITIGROUP INC COM 172967101 30336 650000 SH SOLE 650000 0 0 CITIGROUP INC COM 172967101 786 16830 SH DEFINED 1 16830 0 0 CLEARPOINT BUSINESS RES 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