B717-200 FLIGHT CREW FAILS TO PERFORM APPROACH-DESCENT CHECKLIST AND LEVEL OFF LOW DUE TO MIS-SET ALTIMETER.

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LEVELING AT 9000 FT; ATC INSTRUCTED US TO SLOW TO 180 KTS. WE EXTENDED THE SLATS ONLY TO FIND WE HAD NOT DONE THE IN-RANGE CHKLIST AND; THUS; HAD AN INACCURATE ALTIMETER SETTING. THE CORRECT ALTIMETER WAS 30.37 AND WE STILL HAD 29.92 SET. WE HAD BEEN GIVEN SEVERAL ALT ASSIGNMENTS AND HAD PROBABLY LEVELED OFF SEVERAL HUNDRED FT OFF ON EACH WHILE DSNDING. ATC DID NOT CALL US ON ANY OF THEM OR GIVE US A NUMBER TO CALL AND; AS FAR AS WE COULD TELL; NO CONFLICTS PRESENTED. WE DIDN'T GET ANY TCAS ALERTS ON ANY OTHER TFC. EVENT OCCURRED FOR SEVERAL REASONS. BOTH PLTS WERE ON THE LAST DAY OF A 4 DAY TRIP WITH AN EARLY WAKE-UP; DESPITE THE FACT THAT THE FIRST DAY SHOW TIME HAD BEEN LATE AFTERNOON. SO THERE WAS A DISRUPTION OF CIRCADIAN RHYTHM. I COULD NOT GET TO SLEEP THE NIGHT BEFORE (ESPECIALLY SINCE OUR DUTY-OFF TIME THE FIRST NIGHT OF THE TRIP HAD BEEN VERY LATE!); SO I HAD LESS THAN 8 HRS REST; BUT DID NOT FEEL FATIGUED PRIOR TO THE FLT. ALSO; ATC WAS EVIDENTLY TRAINING NEW CTLRS AND THERE WERE EXCESSIVE (I FEEL) SPD ADJUSTMENTS; CHANGES OF ALT; AND HDG CHANGES; CAUSING TASK SATURATION. WE FORGOT TO DO THE IN-RANGE CHKLIST; AND TO RESET THE ALTIMETERS UNTIL PASSING THROUGH 10000 FT MSL. SCHEDULING COULD HELP BY NOT CONSTRUCTING PAIRINGS THAT CHK IN THE FIRST DAY IN THE LATE AFTERNOON; AND THE LAST DAY VERY EARLY. WE (PLTS) NEED TO BE MORE PROACTIVE ABOUT GETTING THE IN-RANGE AS SOON AS WE PASS FL180 ON THE DSCNT. WE ALSO NEED TO BE COGNIZANT THAT ATC IS DOING A LOT OF TRAINING.