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, 2006

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, 2006


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:     154

Form13F Information Table Value Total:     $16,946,123 (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


1    28-11472                      BNS Investments 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     1105    14845 SH       DEFINED                 14845        0        0
ABITIBI-CONSOLIDATED INC       COM              003924107    16699  6735632 SH       SOLE                  6735632        0        0
AGNICO EAGLE MINES LTD         COM              008474108     5763   186100 SH       SOLE                   186100        0        0
AGRIUM INC                     COM              008916108     6413   237355 SH       SOLE                   237355        0        0
ALCAN INC                      COM              013716105    97392  2443423 SH       SOLE                  2443423        0        0
ALCOA INC                      COM              013817101      409    14595 SH       DEFINED                 14595        0        0
ALTRIA GROUP INC               COM              02209S103     1060    13845 SH       DEFINED                 13845        0        0
AMERICAN EXPRESS CO            COM              025816109      818    14595 SH       DEFINED                 14595        0        0
AMERICAN INTL GROUP INC        COM              026874107      920    13895 SH       DEFINED                 13895        0        0
ANHEUSER BUSCH COS INC         COM              035229103     3563    75000 SH       SOLE                    75000        0        0
APPLIED MATLS INC              COM              038222105     1628   100000 SH       SOLE                   100000        0        0
AT&T INC                       COM              00206R102      475    14595 SH       DEFINED                 14595        0        0
AT&T INC                       COM              00206R102     3902   119855 SH       SOLE                   119855        0        0
ATI TECHNOLOGIES INC           COM              001941103    11163   521033 SH       SOLE                   521033        0        0
AVAYA INC                      COM              053499109     1144   100000 SH       SOLE                   100000        0        0
BANK MONTREAL QUE              COM              063671101  1337823 22119595 SH       SOLE                 22119595        0        0
BANK OF AMERICA CORPORATION    COM              060505104    10714   200000 SH       SOLE                   200000        0        0
BARRICK GOLD CORP              COM              067901108   132143  4302264 SH       SOLE                  4302264        0        0
BCE INC                        COM NEW          05534B760   994422 36657814 SH       SOLE                 36657814        0        0
BCE INC                        COM NEW          05534B760    17375   640500 SH       SOLE    1              640500        0        0
BIOVAIL CORP                   COM              09067J109     3236   212769 SH       SOLE                   212769        0        0
BOEING CO                      COM              097023105     1151    14595 SH       DEFINED                 14595        0        0
BRISTOL MYERS SQUIBB CO        COM              110122108     2492   100000 SH       SOLE                   100000        0        0
BROOKFIELD ASSET MGMT INC      CL A LTD VT SH   112585104   724159 16377836 SH       SOLE                 16377836        0        0
BROOKFIELD PPTYS CORP          COM              112900105    87714  2492690 SH       SOLE                  2492690        0        0
CAE INC                        COM              124765108    18655  2187857 SH       SOLE                  2187857        0        0
CAMECO CORP                    COM              13321L108    37819  1037816 SH       SOLE                  1037816        0        0
CANADIAN NAT RES LTD           COM              136385101   162111  3556961 SH       SOLE                  3556961        0        0
CANADIAN NATL RY CO            COM              136375102   329684  7882098 SH       SOLE                  7882098        0        0
CANADIAN PAC RY LTD            COM              13645T100    41315   831137 SH       SOLE                   831137        0        0
CATERPILLAR INC DEL            COM              149123101      960    14590 SH       DEFINED                 14590        0        0
CDN IMPERIAL BK OF COMMERCE    COM              136069101  1113264 14769081 SH       SOLE                 14769081        0        0
CELESTICA INC                  SUB VTG SHS      15101Q108     3282   306175 SH       SOLE                   306175        0        0
CHC HELICOPTER CORP            CL A SUB VTG     12541C203    23029  1170000 SH       SOLE                  1170000        0        0
CHESAPEAKE ENERGY CORP         COM              165167107     7245   250000 SH       SOLE                   250000        0        0
CHEVRON CORP NEW               COM              166764100     4865    75000 SH       SOLE                    75000        0        0
CITIGROUP INC                  COM              172967101    14901   300000 SH       SOLE                   300000        0        0
CITIGROUP INC                  COM              172967101      737    14830 SH       DEFINED                 14830        0        0
CNX GAS CORP                   COM              12618H309     2317   100000 SH       SOLE                   100000        0        0
COCA COLA CO                   COM              191216100      652    14595 SH       DEFINED                 14595        0        0
COCA COLA CO                   COM              191216100    12510   280000 SH       SOLE                   280000        0        0
COGNOS INC                     COM              19244C109     5061   139322 SH       SOLE                   139322        0        0
COMCAST CORP NEW               CL A             20030N101     4942   133927 SH       SOLE                   133927        0        0
CONCUR TECHNOLOGIES INC        COM              206708109      214    14709 SH       SOLE                    14709        0        0
CORUS ENTERTAINMENT INC        COM CL B NON VTG 220874101    10427   273433 SH       SOLE                   273433        0        0
COTT CORP QUE                  COM              22163N106     1903   111339 SH       SOLE                   111339        0        0
CVS CORP                       COM              126650100     6424   200000 SH       SOLE                   200000        0        0
DISNEY WALT CO                 COM DISNEY       254687106      451    14595 SH       DEFINED                 14595        0        0
DOLLAR TREE STORES INC         COM              256747106     6192   200000 SH       SOLE                   200000        0        0
DOMTAR INC                     COM              257561100     3322   565532 SH       SOLE                   565532        0        0
DORAL FINL CORP                COM              25811P100     1648   250000 SH       SOLE                   250000        0        0
DU PONT E I DE NEMOURS & CO    COM              263534109      629    14695 SH       DEFINED                 14695        0        0
ELECTRONIC ARTS INC            COM              285512109    10804   193480 SH       SOLE                   193480        0        0
ENBRIDGE INC                   COM              29250N105   494560 15324915 SH       SOLE                 15324915        0        0
ENCANA CORP                    COM              292505104   286803  6163415 SH       SOLE                  6163415        0        0
ENTERRA ENERGY TR              TR UNIT          29381P102     2146   225000 SH       SOLE                   225000        0        0
EXXON MOBIL CORP               COM              30231G102      976    14545 SH       DEFINED                 14545        0        0
EXXON MOBIL CORP               COM              30231G102    11743   175000 SH       SOLE                   175000        0        0
FAIRFAX FINL HLDGS LTD         SUB VTG          303901102    24165   186234 SH       SOLE                   186234        0        0
GENERAL ELECTRIC CO            COM              369604103      515    14595 SH       DEFINED                 14595        0        0
GENERAL MTRS CORP              COM              370442105      489    14695 SH       DEFINED                 14695        0        0
GLAMIS GOLD LTD                COM              376775102    10155   258300 SH       SOLE                   258300        0        0
GOLDCORP INC NEW               COM              380956409    15301   648788 SH       SOLE                   648788        0        0
HEWLETT PACKARD CO             COM              428236103      546    14895 SH       DEFINED                 14895        0        0
HOME DEPOT INC                 COM              437076102      529    14595 SH       DEFINED                 14595        0        0
HONEYWELL INTL INC             COM              438516106      597    14595 SH       DEFINED                 14595        0        0
IMPERIAL OIL LTD               COM NEW          453038408   288869  8616723 SH       SOLE                  8616723        0        0
INCO LTD                       COM              453258402    24106   316200 SH       SOLE                   316200        0        0
INTEL CORP                     COM              458140100     6171   300000 SH       SOLE                   300000        0        0
INTEL CORP                     COM              458140100      300    14595 SH       DEFINED                 14595        0        0
INTERNATIONAL BUSINESS MACHS   COM              459200101     1216    14845 SH       DEFINED                 14845        0        0
INTERNATIONAL BUSINESS MACHS   COM              459200101     8194   100000 SH       SOLE                   100000        0        0
INTERNATIONAL RECTIFIER CORP   COM              460254105     3484   100000 SH       SOLE                   100000        0        0
INTEROIL CORP                  COM              460951106     4738   254470 SH       SOLE                   254470        0        0
INTRAWEST CORPORATION          COM NEW          460915200     8307   240844 SH       SOLE                   240844        0        0
IPSCO INC                      COM              462622101    13289   153300 SH       SOLE                   153300        0        0
ISHARES INC                    MSCI TAIWAN      464286731     2914   225000 SH       SOLE                   225000        0        0
ISHARES INC                    MSCI JAPAN       464286848      678    50000 SH       SOLE                    50000        0        0
ISHARES TR                     DJ US REAL EST   464287739     2201    28530 SH       SOLE                    28530        0        0
ISHARES TR                     MSCI EAFE IDX    464287465      324     4780 SH       SOLE                     4780        0        0
ISHARES TR                     MSCI EMERG MKT   464287234      699     7220 SH       SOLE                     7220        0        0
ISHARES TR                     S&P 100 IDX FD   464287101      200     6600 SH       SOLE                     6600        0        0
IVANHOE MINES LTD              COM              46579N103     1294   206313 SH       SOLE                   206313        0        0
JOHNSON & JOHNSON              COM              478160104      944    14545 SH       DEFINED                 14545        0        0
JP MORGAN CHASE & CO           COM              46625H100      685    14595 SH       DEFINED                 14595        0        0
KINROSS GOLD CORP              COM NO PAR       496902404     7035   562079 SH       SOLE                   562079        0        0
MAGNA INTL INC                 CL A             559222401   259435  3573267 SH       SOLE                  3573267        0        0
MANULIFE FINL CORP             COM              56501R106  1624859 50447351 SH       SOLE                 50447351        0        0
MASTERCARD INC                 COM              57636Q104       72   108713 SH       SOLE                   108713        0        0
MCDONALDS CORP                 COM              580135101      571    14595 SH       DEFINED                 14595        0        0
MDS INC                        COM              55269P302     7324   427474 SH       SOLE                   427474        0        0
MEMC ELECTR MATLS INC          COM              552715104     3663   100000 SH       SOLE                   100000        0        0
MERCK & CO INC                 COM              589331107      624    14895 SH       DEFINED                 14895        0        0
MERCK & CO INC                 COM              589331107     4584   109400 SH       SOLE                   109400        0        0
METHANEX CORP                  COM              59151K108    33932  1399998 SH       SOLE                  1399998        0        0
MI DEVS INC                    CL A SUB VTG     55304X104    35164   968062 SH       SOLE                   968062        0        0
MICROSOFT CORP                 COM              594918104     8205   300000 SH       SOLE                   300000        0        0
MICROSOFT CORP                 COM              594918104      406    14845 SH       DEFINED                 14845        0        0
MOLSON COORS BREWING CO        CL B             60871R209     5268    76667 SH       SOLE                    76667        0        0
NEUROCHEM INC                  COM              64125K101     2561   139516 SH       SOLE                   139516        0        0
NEXEN INC                      COM              65334H102    79140  1480424 SH       SOLE                  1480424        0        0
NISOURCE INC                   COM              65473P105     6522   300000 SH       SOLE                   300000        0        0
NORTEL NETWORKS CORP NEW       COM              656568102    15350  6728146 SH       SOLE                  6728146        0        0
NORTH AMERN PALLADIUM LTD      COM              656912102     1683   232179 SH       SOLE                   232179        0        0
NORTHGATE MINERALS CORP        COM              666416102    12190  3795200 SH       SOLE                  3795200        0        0
NOVA CHEMICALS CORP            COM              66977W109    54844  1789743 SH       SOLE                  1789743        0        0
NOVELIS INC                    COM              67000X106    13316   520738 SH       SOLE                   520738        0        0
OPPENHEIMER HLDGS INC          CL A NON VTG     683797104      236     8336 SH       SOLE                     8336        0        0
ORBITAL SCIENCES CORP          COM              685564106      272    14500 SH       DEFINED 1                   0        0    14500
PATTERSON UTI ENERGY INC       COM              703481101     4752   200000 SH       SOLE                   200000        0        0
PETRO-CDA                      COM              71644E102   122605  3044555 SH       SOLE                  3044555        0        0
PFIZER INC                     COM              717081103      394    13895 SH       DEFINED                 13895        0        0
PFIZER INC                     COM              717081103    24815   875000 SH       SOLE                   875000        0        0
PHARMACEUTICAL HLDRS TR        DEPOSITRY RCPT   71712A206     7803   100000 SH       SOLE                   100000        0        0
PITNEY BOWES INC               COM              724479100     8901   200600 SH       SOLE                   200600        0        0
POTASH CORP SASK INC           COM              73755L107    38383   369773 SH       SOLE                   369773        0        0
PRIMEWEST ENERGY TR            TR UNIT NEW      741930309    12985   530655 SH       SOLE                   530655        0        0
PROCTER & GAMBLE CO            COM              742718109      923    14895 SH       DEFINED                 14895        0        0
PROGRESS ENERGY INC            COM              743263105     9484   209000 SH       SOLE                   209000        0        0
PROVIDENT ENERGY TR            TR UNIT          74386K104     5824   500000 SH       SOLE                   500000        0        0
QUALCOMM INC                   COM              747525103     3154    78700 SH       SOLE                    78700        0        0
QUEBECOR WORLD INC             COM NON-VTG      748203106    31071  2980943 SH       SOLE                  2980943        0        0
QWEST COMMUNICATIONS INTL IN   COM              749121109      872   100000 SH       SOLE                   100000        0        0
RESEARCH IN MOTION LTD         COM              760975102    25079   244616 SH       SOLE                   244616        0        0
ROGERS COMMUNICATIONS INC      CL B             775109200    14282   260833 SH       SOLE                   260833        0        0
ROYAL BK CDA MONTREAL QUE      COM              780087102  2525705 57018384 SH       SOLE                 57018384        0        0
ROYAL GROUP TECHNOLOGIES LTD   COM              779915107     6963   600973 SH       SOLE                   600973        0        0
SCHERING PLOUGH CORP           COM              806605101    15467   700200 SH       SOLE                   700200        0        0
SHAW COMMUNICATIONS INC        CL B CONV        82028K200     9085   303378 SH       SOLE                   303378        0        0
SILVER WHEATON CORP            COM              828336107      716    76294 SH       SOLE                    76294        0        0
SLM CORP                       COM              78442P106   204292  3930200 SH       SOLE                  3930200        0        0
SMTC CORP                      COM NEW          832682207     1252   469082 SH       SOLE                   469082        0        0
SOURCE INTERLINK COS INC       COM NEW          836151209      650    60035 SH       SOLE                    60035        0        0
SPDR TR                        UNIT SER 1       78462F103    33657   251660 SH       SOLE                   251660        0        0
SUN LIFE FINL INC              COM              866796105   798144 19456598 SH       SOLE                 19456598        0        0
SUNCOR ENERGY INC              COM              867229106   156784  2185274 SH       SOLE                  2185274        0        0
TAIWAN SEMICONDUCTOR MFG LTD   SPONSORED ADR    874039100      960   100000 SH       SOLE                   100000        0        0
TALISMAN ENERGY INC            COM              87425E103   385358 23613765 SH       SOLE                 23613765        0        0
TECK COMINCO LTD               CL B             878742204   265564  4240303 SH       SOLE                  4240303        0        0
TELUS CORP                     NON-VTG SHS      87971M202   366551  6544634 SH       SOLE                  6544634        0        0
THOMSON CORP                   COM              884903105   400651  9951282 SH       SOLE                  9951282        0        0
TIM HORTONS INC                COM              88706M103    23427   895200 SH       SOLE                   895200        0        0
TORONTO DOMINION BK ONT        COM NEW          891160509  1884607 31713720 SH       SOLE                 31713720        0        0
TRANSALTA CORP                 COM              89346D107   131265  6185237 SH       SOLE                  6185237        0        0
TRANSALTA CORP                 COM              89346D107    49872  2350000 SH       SOLE    1             2350000        0        0
TRANSCANADA CORP               COM              89353D107    33807  1075000 SH       SOLE    1             1075000        0        0
TRANSCANADA CORP               COM              89353D107   628273 19977827 SH       SOLE                 19977827        0        0
UNITED TECHNOLOGIES CORP       COM              913017109      943    14890 SH       DEFINED                 14890        0        0
VERIZON COMMUNICATIONS         COM              92343V104      542    14595 SH       DEFINED                 14595        0        0
VERIZON COMMUNICATIONS         COM              92343V104    12067   325000 SH       SOLE                   325000        0        0
WAL MART STORES INC            COM              931142103      732    14845 SH       DEFINED                 14845        0        0
WAL MART STORES INC            COM              931142103     6165   125000 SH       SOLE                   125000        0        0
WEIGHT WATCHERS INTL INC NEW   COM              948626106     3083    69534 SH       DEFINED 1                   0        0    69534
WILLIAMS COS INC DEL           COM              969457100     4774   200000 SH       SOLE                   200000        0        0