UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

                                    Form 13F

                              Form 13F COVER PAGE

Report for the Calendar Year or Quarter Ended: December 31, 2005

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     February 14, 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:     137

Form13F Information Table Value Total:     $14,686,931 (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     1135    14645 SH       Defined                 14645
ABITIBI-CONSOLIDATED INC       COM              003924107    28111  7015732 SH       Sole                  7015732
AGRIUM INC                     COM              008916108     5383   244355 SH       Sole                   244355
ALCAN INC                      COM              013716105    99249  2416823 SH       Sole                  2416823
ALCOA INC                      COM              013817101      399    13495 SH       Defined                 13495
ALTRIA GROUP INC               COM              02209S103     1020    13645 SH       Defined                 13645
AMERICAN EXPRESS CO            COM              025816109      695    13495 SH       Defined                 13495
AMERICAN INTL GROUP INC        COM              026874107      921    13495 SH       Defined                 13495
ANHEUSER BUSCH COS INC         COM              035229103     3222    75000 SH       Sole                    75000
AT&T INC                       COM              00206R102     7833   319855 SH       Sole                   319855
AT&T INC                       COM              00206R102      330    13495 SH       Defined                 13495
ATI TECHNOLOGIES INC           COM              001941103     6725   394995 SH       Sole                   394995
AVAYA INC                      COM              053499109     1067   100000 SH       Sole                   100000
BANK MONTREAL QUE              COM              063671101  1222732 21877495 SH       Sole                 21877495
BANK OF AMERICA CORPORATION    COM              060505104     9230   200000 SH       Sole                   200000
BARRICK GOLD CORP              COM              067901108    96531  3463906 SH       Sole                  3463906
BCE INC                        COM              05534B109    16775   700000 SH       Defined 1              700000
BCE INC                        COM              05534B109   955277 39863185 SH       Sole                 39863185
BIOVAIL CORP                   COM              09067J109     5406   228369 SH       Sole                   228369
BOEING CO                      COM              097023105      948    13495 SH       Defined                 13495
BROOKFIELD ASSET MGMT INC      CL A LTD VT SH   112585104   590850 11724241 SH       Sole                 11724241
BROOKFIELD PPTYS CORP          COM              112900105     1263    42690 SH       Sole                    42690
CAE INC                        COM              124765108    16113  2199457 SH       Sole                  2199457
CAMECO CORP                    COM              13321L108    33565   529008 SH       Sole                   529008
CANADIAN NAT RES LTD           COM              136385101   185732  3748149 SH       Sole                  3748149
CANADIAN NATL RY CO            COM              136375102   305188  3810760 SH       Sole                  3810760
CANADIAN PAC RY LTD            COM              13645T100    37026   884037 SH       Sole                   884037
CATERPILLAR INC DEL            COM              149123101      768    13290 SH       Defined                 13290
CDN IMPERIAL BK OF COMMERCE    COM              136069101   987862 15035781 SH       Sole                 15035781
CELESTICA INC                  SUB VTG SHS      15101Q108     3271   308275 SH       Sole                   308275
CHC HELICOPTER CORP            CL A SUB VTG     12541C203    27475  1170000 SH       Sole                  1170000
CISCO SYS INC                  COM              17275R102      349    20000 SH       Defined                 20000
CISCO SYS INC                  COM              17275R102     1712   100000 SH       Sole                   100000
CITIGROUP INC                  COM              172967101      675    13880 SH       Defined                 13880
CITIGROUP INC                  COM              172967101     4853   100000 SH       Sole                   100000
COCA COLA CO                   COM              191216100      544    13495 SH       Defined                 13495
COCA COLA CO                   COM              191216100    11287   280000 SH       Sole                   280000
COGNOS INC                     COM              19244C109     4997   143322 SH       Sole                   143322
COMCAST CORP NEW               CL A             20030N101     3471   133927 SH       Sole                   133927
CONCUR TECHNOLOGIES INC        COM              206708109      190    14709 SH       Sole                    14709
COTT CORP QUE                  COM              22163N106     1520   102639 SH       Sole                   102639
CVS CORP                       COM              126650100     5284   200000 SH       Sole                   200000
DISNEY WALT CO                 COM DISNEY       254687106      324    13495 SH       Defined                 13495
DOLLAR TREE STORES INC         COM              256747106     9576   400000 SH       Sole                   400000
DOMTAR INC                     COM              257561100     3336   578232 SH       Sole                   578232
DORAL FINL CORP                COM              25811P100     2650   250000 SH       Sole                   250000
DU PONT E I DE NEMOURS & CO    COM              263534109      574    13495 SH       Defined                 13495
ENBRIDGE INC                   COM              29250N105   472629 15125715 SH       Sole                 15125715
ENCANA CORP                    COM              292505104   290862  6435915 SH       Sole                  6435915
EXXON MOBIL CORP               COM              30231G102    16851   300000 SH       Sole                   300000
EXXON MOBIL CORP               COM              30231G102      767    13645 SH       Defined                 13645
FAIRFAX FINL HLDGS LTD         SUB VTG          303901102    20979   145234 SH       Sole                   145234
FAIRMONT HOTELS RESORTS INC    COM              305204109    23286   550551 SH       Sole                   550551
FALCONBRIDGE LTD NEW 2005      COM              306104100   402647 13573267 SH       Sole                 13573267
GATEWAY INC                    COM              367626108      753   300000 SH       Sole                   300000
GENERAL ELECTRIC CO            COM              369604103      829    23495 SH       Defined                 23495
GENERAL MTRS CORP              COM              370442105      262    13495 SH       Defined                 13495
GENTEK INC                     COM NEW          37245X203      595    33289 SH       Sole                    33289
GOLDCORP INC NEW               COM              380956409    10819   485788 SH       Sole                   485788
HEWLETT PACKARD CO             COM              428236103      521    18058 SH       Defined                 18058
HOME DEPOT INC                 COM              437076102      546    13495 SH       Defined                 13495
HONEYWELL INTL INC             COM              438516106      503    13495 SH       Defined                 13495
IMPERIAL OIL LTD               COM NEW          453038408   301330  3036541 SH       Sole                  3036541
INCO LTD                       COM              453258402    12984   299000 SH       Sole                   299000
INTEL CORP                     COM              458140100      337    14495 SH       Defined                 14495
INTERNATIONAL BUSINESS MACHS   COM              459200101     1157    14045 SH       Defined                 14045
INTERNATIONAL BUSINESS MACHS   COM              459200101    16440   200000 SH       Sole                   200000
INTERNATIONAL RECTIFIER CORP   COM              460254105     3190   100000 SH       Sole                   100000
INTEROIL CORP                  COM              460951106     2891   107400 SH       Sole                   107400
INTRAWEST CORPORATION          COM NEW          460915200     6902   240844 SH       Sole                   240844
IPSCO INC                      COM              462622101     6653    80000 SH       Sole                    80000
ISHARES INC                    MSCI JAPAN       464286848     6084   450000 SH       Sole                   450000
ISHARES TR                     DJ US REAL EST   464287739     1371    21360 SH       Sole                    21360
ISHARES TR                     MSCI EAFE IDX    464287465     1480    24880 SH       Sole                    24880
ISHARES TR                     MSCI EMERG MKT   464287234      510     5780 SH       Sole                     5780
JOHNSON & JOHNSON              COM              478160104      820    13495 SH       Defined                 13495
JP MORGAN CHASE & CO           COM              46625H100      536    13495 SH       Defined                 13495
KINROSS GOLD CORP              COM NO PAR       496902404     4567   494579 SH       Sole                   494579
MAGNA INTL INC                 CL A             559222401   219661  3041267 SH       Sole                  3041267
MANULIFE FINL CORP             COM              56501R106  1039660 17710920 SH       Sole                 17710920
MCDONALDS CORP                 COM              580135101      455    13495 SH       Defined                 13495
MDS INC                        COM              55269P302     7383   426974 SH       Sole                   426974
MERCK & CO INC                 COM              589331107      429    13495 SH       Defined                 13495
MERCK & CO INC                 COM              589331107    21770   684400 SH       Sole                   684400
MERRILL LYNCH & CO INC         COM              590188108     6773   100000 SH       Sole                   100000
METHANEX CORP                  COM              59151K108     7518   399998 SH       Sole                   399998
MI DEVS INC                    CL A SUB VTG     55304X104    33276   965562 SH       Sole                   965562
MICROSOFT CORP                 COM              594918104      491    18495 SH       Defined                 18495
MICROSOFT CORP                 COM              594918104    10460   400000 SH       Sole                   400000
MOLSON COORS BREWING CO        CL B             60871R209     5112    76667 SH       Sole                    76667
NEXEN INC                      COM              65334H102    68921  1446324 SH       Sole                  1446324
NISOURCE INC                   COM              65473P105     6258   300000 SH       Sole                   300000
NOKIA CORP                     SPONSORED ADR    654902204     1830   100000 SH       Sole                   100000
NORTEL NETWORKS CORP NEW       COM              656568102    20746  6796646 SH       Sole                  6796646
NORTEL NETWORKS CORP NEW       NOTE  4.250% 9/0 656568AB8     1433  1500000 PRN      Defined 1             1500000
NOVA CHEMICALS CORP            COM              66977W109    16537  1795543 SH       Sole                  1795543
NOVELIS INC                    COM              67000X106    11449   545918 SH       Sole                   545918
ORBITAL SCIENCES CORP          COM              685564106      186    14500 SH       Defined 1               14500
PETRO-CDA                      COM              71644E102   124689  3108555 SH       Sole                  3108555
PFIZER INC                     COM              717081103      315    13495 SH       Defined                 13495
PFIZER INC                     COM              717081103    18073   775000 SH       Sole                   775000
PHARMACEUTICAL HLDRS TR        DEPOSITRY RCPT   71712A206     6966   100000 SH       Sole                   100000
PITNEY BOWES INC               COM              724479100     8475   200600 SH       Sole                   200600
PLACER DOME INC                COM              725906101    30081  1314217 SH       Sole                  1314217
POTASH CORP SASK INC           COM              73755L107    30602   382273 SH       Sole                   382273
PROCTER & GAMBLE CO            COM              742718109      839    14495 SH       Defined                 14495
PROGRESS ENERGY INC            COM              743263105     9180   209000 SH       Sole                   209000
QUEBECOR WORLD INC             COM NON-VTG      748203106    17748  1313043 SH       Sole                  1313043
QWEST COMMUNICATIONS INTL IN   COM              749121109     1130   200000 SH       Sole                   200000
RESEARCH IN MOTION LTD         COM              760975102    19285   292216 SH       Sole                   292216
ROGERS COMMUNICATIONS INC      CL B             775109200    10814   255633 SH       Sole                   255633
ROYAL BK CDA MONTREAL QUE      COM              780087102  2316927 29672792 SH       Sole                 29672792
SCHERING PLOUGH CORP           COM              806605101    16684   800200 SH       Sole                   800200
SHAW COMMUNICATIONS INC        CL B CONV        82028K200     6996   322478 SH       Sole                   322478
SLM CORP                       COM              78442P106    15701   285300 SH       Sole                   285300
SPDR TR                        UNIT SER 1       78462F103     1465    11770 SH       Sole                    11770
SUN LIFE FINL INC              COM              866796105   604173 15036451 SH       Sole                 15036451
SUNCOR ENERGY INC              COM              867229106   139590  2214174 SH       Sole                  2214174
TALISMAN ENERGY INC            COM              87425E103   418427  7899855 SH       Sole                  7899855
TELUS CORP                     NON-VTG SHS      87971M202   334407  2204634 SH       Sole                  2204634
THOMSON CORP                   COM              884903105   291018  8533888 SH       Sole                  8533888
TIDEWATER INC                  COM              886423102     3650    82100 SH       Sole                    82100
TORONTO DOMINION BK ONT        COM NEW          891160509  1584269 30140767 SH       Sole                 30140767
TRANSALTA CORP                 COM              89346D107    51345  2350000 SH       Defined 1             2350000
TRANSALTA CORP                 COM              89346D107   104309  4774137 SH       Sole                  4774137
TRANSCANADA CORP               COM              89353D107    38604  1225000 SH       Defined 1             1225000
TRANSCANADA CORP               COM              89353D107   629804 19985327 SH       Sole                 19985327
UNITED TECHNOLOGIES CORP       COM              913017109      782    13990 SH       Defined                 13990
UST INC                        COM              902911106    12249   300000 SH       Sole                   300000
VERIZON COMMUNICATIONS         COM              92343V104    12801   425000 SH       Sole                   425000
VERIZON COMMUNICATIONS         COM              92343V104      481    13495 SH       Defined                 13495
WACHOVIA CORP 2ND NEW          COM              929903102     1322    25000 SH       Sole                    25000
WAL MART STORES INC            COM              931142103      639    13645 SH       Defined                 13645
WAL MART STORES INC            COM              931142103     5850   125000 SH       Sole                   125000
WASHINGTON MUT INC             COM              939322103     4350   100000 SH       Sole                   100000
WEIGHT WATCHERS INTL INC NEW   COM              948626106    16482   319534 SH       Defined 1              319534
ZALE CORP NEW                  COM              988858106     2516   100000 SH       Sole                   100000