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 INC    COM              185061108     1562   840000 SH       SOLE                   840000        0        0
COCA COLA CO                   COM              191216100      963    16745 SH       DEFINED 1               16745        0        0
COCA COLA CO                   COM              191216100     2874    50000 SH       SOLE                    50000        0        0
COGNOS INC                     COM              19244C109     5744   139031 SH       SOLE                   139031        0        0
COMPANIA DE MINAS BUENAVENTU   SPONSORED ADR    204448104     1881    37619 SH       DEFINED 1               37619        0        0
CONCUR TECHNOLOGIES INC        COM              206708109      464    14709 SH       SOLE                    14709        0        0
CORUS ENT INC                  COM CL B NON VTG 220874101    15779   333333 SH       SOLE                   333333        0        0
COTT CORP QUE                  COM              22163N106      893   112478 SH       SOLE                   112478        0        0
CVS CAREMARK CORPORATION       COM              126650100    13673   345000 SH       SOLE                   345000        0        0
DISNEY WALT CO                 COM DISNEY       254687106      576    16745 SH       DEFINED 1               16745        0        0
DOW CHEM CO                    COM              260543103     3230    75000 SH       SOLE                    75000        0        0
DU PONT E I DE NEMOURS & CO    COM              263534109      836    16845 SH       DEFINED 1               16845        0        0
EL PASO CORP                   COM              28336L109     3521   207500 SH       SOLE                   207500        0        0
ENBRIDGE INC                   COM              29250N105   585806 15992308 SH       SOLE                 15992308        0        0
ENCANA CORP                    COM              292505104   301396  4875262 SH       SOLE                  4875262        0        0
ENERPLUS RES FD                UNIT TR G NEW    29274D604    35023   742866 SH       SOLE                   742866        0        0
ENSCO INTL INC                 COM              26874Q100    10836   193100 SH       SOLE                   193100        0        0
ENTERRA ENERGY TR              TR UNIT          29381P102      606   225000 SH       SOLE                   225000        0        0
EXXON MOBIL CORP               COM              30231G102     1551    16745 SH       DEFINED 1               16745        0        0
FLEXTRONICS INTL LTD           ORD              Y2573F102     1677   150000 SH       SOLE                   150000        0        0
FORDING CDN COAL TR            TR UNIT          345425102    11101   287220 SH       SOLE                   287220        0        0
GENERAL ELECTRIC CO            COM              369604103      698    16845 SH       DEFINED 1               16845        0        0
GENERAL ELECTRIC CO            COM              369604103     1035    25000 SH       SOLE                    25000        0        0
GENERAL MTRS CORP              COM              370442105      619    16845 SH       DEFINED 1               16845        0        0
GENEREX BIOTECHNOLOGY CP DEL   COM              371485103     2054  1360300 SH       SOLE                  1360300        0        0
GERDAU AMERISTEEL CORP         COM              37373P105      155    13100 SH       SOLE                    13100        0        0
GOLDCORP INC NEW               COM              380956409    46827  1532352 SH       SOLE                  1532352        0        0
GROUPE CGI INC                 CL A SUB VTG     39945C109      245    21400 SH       SOLE                    21400        0        0
HALLIBURTON CO                 COM              406216101     7680   200000 SH       SOLE                   200000        0        0
HARVEST ENERGY TR              TRUST UNIT       41752X101    17895   665000 SH       SOLE                   665000        0        0
HEWLETT PACKARD CO             COM              428236103      842    16895 SH       DEFINED 1               16895        0        0
HOME DEPOT INC                 COM              437076102     3244   100000 SH       SOLE                   100000        0        0
HOME DEPOT INC                 COM              437076102      544    16745 SH       DEFINED 1               16745        0        0
HONEYWELL INTL INC             COM              438516106      997    16745 SH       DEFINED 1               16745        0        0
IMPERIAL OIL LTD               COM NEW          453038408   426027  8598334 SH       SOLE                  8598334        0        0
INTEL CORP                     COM              458140100      433    16745 SH       DEFINED 1               16745        0        0
INTEL CORP                     COM              458140100     2586   100000 SH       SOLE                   100000        0        0
INTERNATIONAL BUSINESS MACHS   COM              459200101     1974    16745 SH       DEFINED 1               16745        0        0
INTEROIL CORP                  COM              460951106     8273   265470 SH       SOLE                   265470        0        0
ISHARES INC                    MSCI FRANCE      464286707     4808   125000 SH       SOLE                   125000        0        0
ISHARES INC                    MSCI AUSTRALIA   464286103     4371   137500 SH       SOLE                   137500        0        0
ISHARES INC                    MSCI BRAZIL      464286400     8091   110000 SH       SOLE                   110000        0        0
ISHARES TR                     DJ US REAL EST   464287739     3643    47630 SH       SOLE                    47630        0        0
ISHARES TR                     MSCI EAFE IDX    464287465     1794    21710 SH       SOLE                    21710        0        0
ISHARES TR                     MSCI EMERG MKT   464287234      329     2200 SH       SOLE                     2200        0        0
JOHNSON & JOHNSON              COM              478160104     1101    16745 SH       DEFINED 1               16745        0        0
JOHNSON & JOHNSON              COM              478160104    11498   175000 SH       SOLE                   175000        0        0
JP MORGAN CHASE & CO           COM              46625H100      768    16745 SH       DEFINED 1               16745        0        0
KINROSS GOLD CORP              COM NO PAR       496902404    13834   926133 SH       SOLE                   926133        0        0
LUNDIN MINING CORP             COM              550372106     6650   520453 SH       SOLE                   520453        0        0
MANULIFE FINL CORP             COM              56501R106  2114514 51292822 SH       SOLE                 51292822        0        0
MASTERCARD INC                 CL A             57636Q104     7594    55433 SH       SOLE                    55433        0        0
MCDONALDS CORP                 COM              580135101      913    16745 SH       DEFINED 1               16745        0        0
MDS INC                        COM              55269P302     7938   367448 SH       SOLE                   367448        0        0
MERCK & CO INC                 COM              589331107      840    16245 SH       DEFINED 1               16245        0        0
MERIDIAN GOLD INC              COM              589975101    53583  1611857 SH       SOLE                  1611857        0        0
METHANEX CORP                  COM              59151K108    40257  1599998 SH       SOLE                  1599998        0        0
MI DEVS INC                    CL A SUB VTG     55304X104    31768   959412 SH       SOLE                   959412        0        0
MICROSOFT CORP                 COM              594918104      494    16745 SH       DEFINED 1               16745        0        0
MINEFINDERS LTD                COM              602900102     1072   100000 SH       SOLE                   100000        0        0
MOLSON COORS BREWING CO        CL B             60871R209     3981    80182 SH       SOLE                    80182        0        0
NEUROCHEM INC                  COM              64125K101      680   245900 SH       SOLE                   245900        0        0
NEW GOLD INC CDA               COM              644535106     1391   225000 SH       SOLE                   225000        0        0
NEXEN INC                      COM              65334H102    92894  3040841 SH       SOLE                  3040841        0        0
NISOURCE INC                   COM              65473P105     5742   300000 SH       SOLE                   300000        0        0
NORTEL NETWORKS CORP NEW       COM NEW          656568508    11589   683764 SH       SOLE                   683764        0        0
NOVA CHEMICALS CORP            COM              66977W109    68486  1775342 SH       SOLE                  1775342        0        0
OPEN TEXT CORP                 COM              683715106     4776   183000 SH       SOLE                   183000        0        0
OPPENHEIMER HLDGS INC          CL A NON VTG     683797104      405     8336 SH       SOLE                     8336        0        0
ORBITAL SCIENCES CORP          COM              685564106      322    14500 SH       DEFINED 1                            0    14500
PATTERSON UTI ENERGY INC       COM              703481101     6771   300000 SH       SOLE                   300000        0        0
PEABODY ENERGY CORP            COM              704549104      397     8300 SH       SOLE                     8300        0        0
PENN WEST ENERGY TR            TR UNIT          707885109    30702   988429 SH       SOLE                   988429        0        0
PETRO-CDA                      COM              71644E102   170905  2979053 SH       SOLE                  2979053        0        0
PFIZER INC                     COM              717081103      397    16245 SH       DEFINED 1               16245        0        0
PFIZER INC                     COM              717081103    21376   875000 SH       SOLE                   875000        0        0
POPULAR INC                    COM              733174106     2149   175000 SH       SOLE                   175000        0        0
POTASH CORP SASK INC           COM              73755L107   112069  1061269 SH       SOLE                  1061269        0        0
PRECISION DRILLING TR          TR UNIT          740215108     2703   140982 SH       SOLE                   140982        0        0
PRIMEWEST ENERGY TR            TR UNIT NEW      741930309     4630   175400 SH       SOLE                   175400        0        0
PROCTER & GAMBLE CO            COM              742718109     1175    16695 SH       DEFINED 1               16695        0        0
PROVIDENT ENERGY TR            TR UNIT          74386K104     9911   780000 SH       SOLE                   780000        0        0
QLOGIC CORP                    COM              747277101     1345   100000 SH       SOLE                   100000        0        0
QUALITY SYS INC                COM              747582104     3663   100000 SH       SOLE                   100000        0        0
QUEBECOR WORLD INC             COM NON-VTG      748203106     1107   114334 SH       SOLE                   114334        0        0
RESEARCH IN MOTION LTD         COM              760975102    72188   734653 SH       SOLE                   734653        0        0
ROGERS COMMUNICATIONS INC      CL B             775109200    39976   878254 SH       SOLE                   878254        0        0
ROYAL BK CDA MONTREAL QUE      COM              780087102  3144389 56821752 SH       SOLE                 56821752        0        0
SCHERING PLOUGH CORP           COM              806605101     1687    53325 SH       SOLE                    53325        0        0
SHAW COMMUNICATIONS INC        CL B CONV        82028K200    20578   828766 SH       SOLE                   828766        0        0
SILICON IMAGE INC              COM              82705T102      515   100000 SH       SOLE                   100000        0        0
SILVER WHEATON CORP            COM              828336107     1064    76294 SH       SOLE                    76294        0        0
SLM CORP                       COM              78442P106   195213  3930200 SH       SOLE                  3930200        0        0
SMTC CORP                      COM NEW          832682207     1112   469082 SH       SOLE                   469082        0        0
SOURCE INTERLINK COS INC       COM NEW          836151209      250    60035 SH       SOLE                    60035        0        0
SOUTHERN COPPER CORP           COM              84265V105     1370    11000 SH       DEFINED 1               11000        0        0
SOUTHWEST AIRLS CO             COM              844741108      370    25000 SH       SOLE                    25000        0        0
SPDR TR                        UNIT SER 1       78462F103     1955    12810 SH       SOLE                    12810        0        0
STORM CAT ENERGY CORP          COM              862168101      558   750000 SH       SOLE                   750000        0        0
SUN LIFE FINL INC              COM              866796105  1012926 19303795 SH       SOLE                 19303795        0        0
SUNCOR ENERGY INC              COM              867229106   208328  2194122 SH       SOLE                  2194122        0        0
TALISMAN ENERGY INC            COM              87425E103   455638 23208855 SH       SOLE                 23208855        0        0
TATA MTRS LTD                  SPONSORED ADR    876568502     4785   250000 SH       SOLE                   250000        0        0
TECK COMINCO LTD               CL B             878742204   684021 14409500 SH       SOLE                 14409500        0        0
TELUS CORP                     NON-VTG SHS      87971M202   297586  5514703 SH       SOLE                  5514703        0        0
THOMSON CORP                   COM              884903105   416842  9953782 SH       SOLE                  9953782        0        0
TIM HORTONS INC                COM              88706M103    10267   294775 SH       SOLE                   294775        0        0
TONGJITANG CHINESE MED CO      SPON ADR         89025E103      694    66400 SH       SOLE                    66400        0        0
TORONTO DOMINION BK ONT        COM NEW          891160509  2438391 31791757 SH       SOLE                 31791757        0        0
TRANSALTA CORP                 COM              89346D107   198775  6317589 SH       SOLE                  6317589        0        0
TRANSALTA CORP                 COM              89346D107    67647  2150000 SH       SOLE    1             2150000        0        0
TRANSCANADA CORP               COM              89353D107    32078   875000 SH       SOLE    1              875000        0        0
TRANSCANADA CORP               COM              89353D107   749085 20432980 SH       SOLE                 20432980        0        0
U S G CORP                     COM NEW          903293405     3004    80000 SH       SOLE                    80000        0        0
UNITED TECHNOLOGIES CORP       COM              913017109     1308    16240 SH       DEFINED 1               16240        0        0
VALERO ENERGY CORP NEW         COM              91913Y100     6718   100000 SH       SOLE                   100000        0        0
VERIZON COMMUNICATIONS         COM              92343V104      742    16745 SH       DEFINED 1               16745        0        0
WAL MART STORES INC            COM              931142103      705    16145 SH       DEFINED 1               16145        0        0
WAL MART STORES INC            COM              931142103    14186   325000 SH       SOLE                   325000        0        0
WEIGHT WATCHERS INTL INC NEW   COM              948626106     1124    19534 SH       DEFINED 1                            0    19534
WHOLE FOODS MKT INC            COM              966837106     2448    50000 SH       SOLE                    50000        0        0
YAMANA GOLD INC                COM              98462Y100     5767   488219 SH       SOLE                   488219        0        0
YM BIOSCIENCES INC             COM              984238105      689   448000 SH       SOLE                   448000        0        0
ZALE CORP NEW                  COM              988858106     2314   100000 SH       SOLE                   100000        0        0