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

                                    Form 13F

                              Form 13F COVER PAGE

Report for the Calendar Year or Quarter Ended: June 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     August 11, 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:     146

Form13F Information Table Value Total:     $15,833,519 (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 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     1443    17845 SH       DEFINED                 17845        0        0
ABITIBI-CONSOLIDATED INC       COM              003924107    18546  6877532 SH       SOLE                  6877532        0        0
ADVANTAGE ENERGY INCOME FD     TR UNIT          00762L101     7518   430567 SH       SOLE                   430567        0        0
AGNICO EAGLE MINES LTD         COM              008474108     5285   159400 SH       SOLE                   159400        0        0
AGRIUM INC                     COM              008916108     5716   246155 SH       SOLE                   246155        0        0
ALCAN INC                      COM              013716105   113796  2429123 SH       SOLE                  2429123        0        0
ALCOA INC                      COM              013817101      603    18595 SH       DEFINED                 18595        0        0
ALTRIA GROUP INC               COM              02209S103     1312    17845 SH       DEFINED                 17845        0        0
AMERICAN EXPRESS CO            COM              025816109      991    18595 SH       DEFINED                 18595        0        0
AMERICAN INTL GROUP INC        COM              026874107     1099    18595 SH       DEFINED                 18595        0        0
ANHEUSER BUSCH COS INC         COM              035229103     3419    75000 SH       SOLE                    75000        0        0
AT&T INC                       COM              00206R102      519    18595 SH       DEFINED                 18595        0        0
AT&T INC                       COM              00206R102     5435   194855 SH       SOLE                   194855        0        0
ATI TECHNOLOGIES INC           COM              001941103     5782   397895 SH       SOLE                   397895        0        0
AVAYA INC                      COM              053499109     1142   100000 SH       SOLE                   100000        0        0
BANK MONTREAL QUE              COM              063671101  1189550 22107495 SH       SOLE                 22107495        0        0
BANK OF AMERICA CORPORATION    COM              060505104     9620   200000 SH       SOLE                   200000        0        0
BARRICK GOLD CORP              COM              067901108   128317  4344181 SH       SOLE                  4344181        0        0
BCE INC                        COM              05534B109    16544   700000 SH       SOLE    1              700000        0        0
BCE INC                        COM              05534B109   946844 40063185 SH       SOLE                 40063185        0        0
BIOVAIL CORP                   COM              09067J109     5350   229169 SH       SOLE                   229169        0        0
BOEING CO                      COM              097023105     1525    18595 SH       DEFINED                 18595        0        0
BRISTOL MYERS SQUIBB CO        COM              110122108     2586   100000 SH       SOLE                   100000        0        0
BROOKFIELD ASSET MGMT INC      CL A LTD VT SH   112585104   666753 16590061 SH       SOLE                 16590061        0        0
BROOKFIELD PPTYS CORP          COM              112900105    79100  2492690 SH       SOLE                  2492690        0        0
CAE INC                        COM              124765108    16749  2199457 SH       SOLE                  2199457        0        0
CAMECO CORP                    COM              13321L108    42271  1061016 SH       SOLE                  1061016        0        0
CANADIAN NAT RES LTD           COM              136385101   201519  3644449 SH       SOLE                  3644449        0        0
CANADIAN NATL RY CO            COM              136375102   332331  7607620 SH       SOLE                  7607620        0        0
CANADIAN PAC RY LTD            COM              13645T100    45134   885237 SH       SOLE                   885237        0        0
CATERPILLAR INC DEL            COM              149123101     1312    17590 SH       DEFINED                 17590        0        0
CDN IMPERIAL BK OF COMMERCE    COM              136069101   987788 14757981 SH       SOLE                 14757981        0        0
CELESTICA INC                  SUB VTG SHS      15101Q108     2928   309175 SH       SOLE                   309175        0        0
CHC HELICOPTER CORP            CL A SUB VTG     12541C203    27987  1170000 SH       SOLE                  1170000        0        0
CHESAPEAKE ENERGY CORP         COM              165167107     4538   150000 SH       SOLE                   150000        0        0
CISCO SYS INC                  COM              17275R102      257    13000 SH       DEFINED                 13000        0        0
CITIGROUP INC                  COM              172967101    14472   300000 SH       SOLE                   300000        0        0
CITIGROUP INC                  COM              172967101      910    18780 SH       DEFINED                 18780        0        0
CNX GAS CORP                   COM              12618H309     1800    60000 SH       SOLE                    60000        0        0
COCA COLA CO                   COM              191216100      801    18595 SH       DEFINED                 18595        0        0
COCA COLA CO                   COM              191216100    12046   280000 SH       SOLE                   280000        0        0
COGNOS INC                     COM              19244C109     3994   141922 SH       SOLE                   141922        0        0
COMCAST CORP NEW               CL A             20030N101     4385   133927 SH       SOLE                   133927        0        0
CONCUR TECHNOLOGIES INC        COM              206708109      228    14709 SH       SOLE                    14709        0        0
COTT CORP QUE                  COM              22163N106     1343   102639 SH       SOLE                   102639        0        0
CVS CORP                       COM              126650100     6140   200000 SH       SOLE                   200000        0        0
DISNEY WALT CO                 COM DISNEY       254687106      559    18595 SH       DEFINED                 18595        0        0
DOLLAR TREE STORES INC         COM              256747106     7950   300000 SH       SOLE                   300000        0        0
DOMTAR INC                     COM              257561100     3572   578632 SH       SOLE                   578632        0        0
DORAL FINL CORP                COM              25811P100     1603   250000 SH       SOLE                   250000        0        0
DU PONT E I DE NEMOURS & CO    COM              263534109      737    17695 SH       DEFINED                 17695        0        0
ELECTRONIC ARTS INC            COM              285512109     8327   193480 SH       SOLE                   193480        0        0
ENBRIDGE INC                   COM              29250N105   460415 15128515 SH       SOLE                 15128515        0        0
ENCANA CORP                    COM              292505104   337151  6402315 SH       SOLE                  6402315        0        0
ENTERRA ENERGY TR              TR UNIT          29381P102     3040   225000 SH       SOLE                   225000        0        0
EXXON MOBIL CORP               COM              30231G102     1139    18545 SH       DEFINED                 18545        0        0
EXXON MOBIL CORP               COM              30231G102    21473   350000 SH       SOLE                   350000        0        0
FAIRFAX FINL HLDGS LTD         SUB VTG          303901102    17085   179634 SH       SOLE                   179634        0        0
FALCONBRIDGE LTD NEW 2005      COM              306104100   692703 13149567 SH       SOLE                 13149567        0        0
GENERAL ELECTRIC CO            COM              369604103      614    18595 SH       DEFINED                 18595        0        0
GENERAL MTRS CORP              COM              370442105      528    17695 SH       DEFINED                 17695        0        0
GLAMIS GOLD LTD                COM              376775102     8993   237200 SH       SOLE                   237200        0        0
GOLDCORP INC NEW               COM              380956409    18034   598188 SH       SOLE                   598188        0        0
HEWLETT PACKARD CO             COM              428236103      590    18595 SH       DEFINED                 18595        0        0
HOME DEPOT INC                 COM              437076102      666    18595 SH       DEFINED                 18595        0        0
HONEYWELL INTL INC             COM              438516106      750    18595 SH       DEFINED                 18595        0        0
IMPERIAL OIL LTD               COM NEW          453038408   332609  9103923 SH       SOLE                  9103923        0        0
INCO LTD                       COM              453258402    19985   303500 SH       SOLE                   303500        0        0
INTEL CORP                     COM              458140100     1001    54595 SH       DEFINED                 54595        0        0
INTEL CORP                     COM              458140100     5700   300000 SH       SOLE                   300000        0        0
INTERNATIONAL BUSINESS MACHS   COM              459200101     1427    18545 SH       DEFINED                 18545        0        0
INTERNATIONAL BUSINESS MACHS   COM              459200101    15364   200000 SH       SOLE                   200000        0        0
INTEROIL CORP                  COM              460951106     4730   247400 SH       SOLE                   247400        0        0
INTRAWEST CORPORATION          COM NEW          460915200     7612   240844 SH       SOLE                   240844        0        0
IPSCO INC                      COM              462622101    14256   148900 SH       SOLE                   148900        0        0
ISHARES INC                    MSCI JAPAN       464286848      684    50000 SH       SOLE                    50000        0        0
ISHARES INC                    MSCI TAIWAN      464286731     2885   225000 SH       SOLE                   225000        0        0
ISHARES TR                     DJ US REAL EST   464287739     2034    28530 SH       SOLE                    28530        0        0
ISHARES TR                     MSCI EAFE IDX    464287465      208     3180 SH       SOLE                     3180        0        0
ISHARES TR                     MSCI EMERG MKT   464287234      678     7220 SH       SOLE                     7220        0        0
JOHNSON & JOHNSON              COM              478160104     1053    17545 SH       DEFINED                 17545        0        0
JP MORGAN CHASE & CO           COM              46625H100      782    18595 SH       DEFINED                 18595        0        0
KINROSS GOLD CORP              COM NO PAR       496902404     5419   496979 SH       SOLE                   496979        0        0
MAGNA INTL INC                 CL A             559222401   247944  3475067 SH       SOLE                  3475067        0        0
MANULIFE FINL CORP             COM              56501R106  1239789 39125016 SH       SOLE                 39125016        0        0
MCDONALDS CORP                 COM              580135101      626    18595 SH       DEFINED                 18595        0        0
MDS INC                        COM              55269P302     7826   429274 SH       SOLE                   429274        0        0
MERCK & CO INC                 COM              589331107      678    18595 SH       DEFINED                 18595        0        0
MERCK & CO INC                 COM              589331107    14004   384400 SH       SOLE                   384400        0        0
METHANEX CORP                  COM              59151K108    29513  1399998 SH       SOLE                  1399998        0        0
MI DEVS INC                    CL A SUB VTG     55304X104    32912   970562 SH       SOLE                   970562        0        0
MICROSOFT CORP                 COM              594918104     9320   400000 SH       SOLE                   400000        0        0
MICROSOFT CORP                 COM              594918104      776    33595 SH       DEFINED                 33595        0        0
MOLSON COORS BREWING CO        CL B             60871R209     5228    76667 SH       SOLE                    76667        0        0
NEUROCHEM INC                  COM              64125K101     1469   139516 SH       SOLE                   139516        0        0
NEXEN INC                      COM              65334H102    81582  1447724 SH       SOLE                  1447724        0        0
NISOURCE INC                   COM              65473P105     6552   300000 SH       SOLE                   300000        0        0
NORTEL NETWORKS CORP NEW       COM              656568102    15098  6795146 SH       SOLE                  6795146        0        0
NORTH AMERN PALLADIUM LTD      COM              656912102     2003   232179 SH       SOLE                   232179        0        0
NORTHGATE MINERALS CORP        COM              666416102     2741   750000 SH       SOLE                   750000        0        0
NOVA CHEMICALS CORP            COM              66977W109    51578  1795743 SH       SOLE                  1795743        0        0
NOVELIS INC                    COM              67000X106    11667   545818 SH       SOLE                   545818        0        0
OPPENHEIMER HLDGS INC          CL A NON VTG     683797104      222     8336 SH       SOLE                     8336        0        0
ORBITAL SCIENCES CORP          COM              685564106      234    14500 SH       DEFINED 1               14500        0        0
PATTERSON UTI ENERGY INC       COM              703481101     5662   200000 SH       SOLE                   200000        0        0
PETRO-CDA                      COM              71644E102   146793  3093855 SH       SOLE                  3093855        0        0
PFIZER INC                     COM              717081103      437    18595 SH       DEFINED                 18595        0        0
PFIZER INC                     COM              717081103    20536   875000 SH       SOLE                   875000        0        0
PHARMACEUTICAL HLDRS TR        DEPOSITRY RCPT   71712A206     7033   100000 SH       SOLE                   100000        0        0
PITNEY BOWES INC               COM              724479100     8285   200600 SH       SOLE                   200600        0        0
POTASH CORP SASK INC           COM              73755L107    32355   377773 SH       SOLE                   377773        0        0
PRIMEWEST ENERGY TR            TR UNIT NEW      741930309    15030   500797 SH       SOLE                   500797        0        0
PROCTER & GAMBLE CO            COM              742718109      996    17895 SH       DEFINED                 17895        0        0
PROGRESS ENERGY INC            COM              743263105     8960   209000 SH       SOLE                   209000        0        0
QUEBECOR WORLD INC             COM NON-VTG      748203106    34588  3113443 SH       SOLE                  3113443        0        0
QWEST COMMUNICATIONS INTL IN   COM              749121109     1618   200000 SH       SOLE                   200000        0        0
RESEARCH IN MOTION LTD         COM              760975102    20430   293116 SH       SOLE                   293116        0        0
ROGERS COMMUNICATIONS INC      CL B             775109200    10414   258833 SH       SOLE                   258833        0        0
ROYAL BK CDA MONTREAL QUE      COM              780087102  2332026 57436184 SH       SOLE                 57436184        0        0
ROYAL GROUP TECHNOLOGIES LTD   COM              779915107     6730   600973 SH       SOLE                   600973        0        0
SCHERING PLOUGH CORP           COM              806605101    15228   800200 SH       SOLE                   800200        0        0
SHAW COMMUNICATIONS INC        CL B CONV        82028K200     9075   321078 SH       SOLE                   321078        0        0
SILICON IMAGE INC              COM              82705T102     1078   100000 SH       SOLE                   100000        0        0
SLM CORP                       COM              78442P106   207986  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      646    59612 SH       SOLE                    59612        0        0
SUN LIFE FINL INC              COM              866796105   675030 16989129 SH       SOLE                 16989129        0        0
SUNCOR ENERGY INC              COM              867229106   179375  2216274 SH       SOLE                  2216274        0        0
TALISMAN ENERGY INC            COM              87425E103   413601 23699265 SH       SOLE                 23699265        0        0
TELUS CORP                     NON-VTG SHS      87971M202   264142  6544634 SH       SOLE                  6544634        0        0
THOMSON CORP                   COM              884903105   383479  9952082 SH       SOLE                  9952082        0        0
TIM HORTONS INC                COM              88706M103    15268   594200 SH       SOLE                   594200        0        0
TORONTO DOMINION BK ONT        COM NEW          891160509  1507419 29685620 SH       SOLE                 29685620        0        0
TRANSALTA CORP                 COM              89346D107   125796  6089037 SH       SOLE                  6089037        0        0
TRANSALTA CORP                 COM              89346D107    48550  2350000 SH       SOLE    1             2350000        0        0
TRANSCANADA CORP               COM              89353D107   570284 19985927 SH       SOLE                 19985927        0        0
TRANSCANADA CORP               COM              89353D107    30674  1075000 SH       SOLE    1             1075000        0        0
UNITED TECHNOLOGIES CORP       COM              913017109     1136    17890 SH       DEFINED                 17890        0        0
UST INC                        COM              902911106     9038   200000 SH       SOLE                   200000        0        0
VERIZON COMMUNICATIONS         COM              92343V104      624    18595 SH       DEFINED                 18595        0        0
VERIZON COMMUNICATIONS         COM              92343V104    10884   325000 SH       SOLE                   325000        0        0
WAL MART STORES INC            COM              931142103      861    17845 SH       DEFINED                 17845        0        0
WAL MART STORES INC            COM              931142103     6021   125000 SH       SOLE                   125000        0        0
WEIGHT WATCHERS INTL INC NEW   COM              948626106     2843    69534 SH       DEFINED 1               69534        0        0
WILLIAMS COS INC DEL           COM              969457100     4672   200000 SH       SOLE                   200000        0        0
ZALE CORP NEW                  COM              988858106     4818   200000 SH       SOLE                   200000        0        0