AN LTT ACR ACFT ON BASE LEG TO A PARALLEL RWY CROSSES IN FRONT OF AN MLG ACR ACFT ON FINAL TO THE OTHER PARALLEL RWY CAUSING ALARM TO THE OTHER FLC.

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OUR EMB-120 BRASILIA WAS ON NORMAL R DOWNWIND FOR RWY 29R AT FRESNO. A ACR Z B-727 WAS TOUCHING DOWN ON 29R HAVING APCHED FROM A WIDE R DOWNWIND FOR 29R. ACR Y WAS ON A L EXTENDED DOWNWIND TURNING L BASE FOR 29R. ON DOWNWIND; I REQUESTED THAT WE CROSS OVERHEAD THE ARPT FOR A L DOWNWIND FOR 29L SO THAT WE WOULD NOT HAVE TO FOLLOW THE ACR Y B-737 WHO WAS ON AN EXTENDED L DOWNWIND FOR 29R. THE CTLR SAID HE WOULD CROSS US IN BTWN THE BOEINGS FOR 29L (R BASE FOR 29L). I INDICATED I HAD BOTH BOEINGS IN SIGHT AND WAS TOLD TO MAINTAIN VISUAL SEPARATION AND CLRED VISUAL APCH 29L; CONTACT TWR. ONCE ON TWR; THE CTLR INSTRUCTED US TO EXTEND DOWNWIND TO FOLLOW THE SECOND BOEING. I SAID THAT THE APCH CTLR WAS CLRING US ACROSS THE FINAL FOR R BASE 29L. HE ACKNOWLEDGED AND CLRED US FOR R BASE 29L. ACR Z WAS TOUCHING DOWN ON 29R WHILE WE WERE ON BASE AND ACR Y WAS ON EXTENDED L BASE TO FINAL 29R. WE HAD HIM CLRLY IN SIGHT AND THERE WAS PLENTY OF SEPARATION. AT FIRST HE DID NOT HAVE US IN SIGHT -- ONLY ON TCASII. HE THEN SAW US AND SAID 'THIS DOES NOT LOOK GOOD AT ALL.' THE CTLR ASKED US TO EXPEDITE ACROSS THE 29R FINAL. AT THIS POINT; WE WERE ACROSS THE 29R FINAL TURNING FINAL FOR 29L. ALL ACFT LANDED WITHOUT INCIDENT; ALTHOUGH IT SOUNDED LIKE THE ACR Y PLT THOUGHT WE WERE TOO CLOSE. IN HINDSIGHT WE SHOULD HAVE EXTENDED R DOWNWIND TO FOLLOW ACR Y. THAT WAS THE MORE PRUDENT COURSE OF ACTION. I FEEL THAT THE FACT THAT WE WERE ON THE FINAL LEG OF A 13 1/2 HR DUTY AND 7.5 HR BLOCK; 8 LEG DAY CONTRIBUTED TO THE 'GET HOMEITIS' SYNDROME. IN ADDITION WE WERE ARRIVING ALREADY A HALF HR LATE. WE DID SEE BOTH ACFT ALL THE WAY AND; IN MY JUDGEMENT; THERE WAS PLENTY OF SEPARATION. PERHAPS THE ACR Y PLT THOUGHT WE TOO WERE LNDG ON 29R.