MD80 CREW LANDED IN BOS WITHOUT TWR CLRNC.

Narrative

CAPT WAS HAND FLYING ILS RWY 27 APCH IN VMC TO BOS. I WAS PERFORMING DUTIES AS PNF; WHICH INCLUDED COMPLETION OF CHKLISTS; RADIO COM; CABIN BRIEFINGS AND MONITORING ACFT APCH AND TFC SEPARATION. DURING APCH; THE CAPT AND I FAILED TO RECOGNIZE THAT APCH DID NOT HAND US OFF TO THE TWR. AT APPROX 7 MI FROM THE ARPT; I REVIEWED THE APCH PLATE TO DETERMINE THE APPROPRIATE TWR FREQ AND PUT IT INTO THE STAND-BY WINDOW OF THE #1 COM RADIO. I BECAME DISTR BY COMMANDS FROM THE PF AND CONFIGURING THE ACFT; CHKLIST COMPLETION AND FAILED TO NOTICE I WAS NOT ASKED BY APCH CTL TO SWITCH TO TWR. AFTER LNDG AND STOPPING AT THE HIGH SPD TXWY TURNOFF; I QUERIED THE TWR FOR FURTHER INSTRUCTIONS. APCH CTL RESPONDED THAT WE SHOULD CONTACT THE TWR NOW ON FREQ 119.1. I REALIZED THAT WE HAD LANDED WITHOUT RADIO CONTACT WITH BOS TWR. I IMMEDIATELY CONTACTED THE TWR. THE TWR ASKED IF WE COULD HEAR THEM AND I RESPONDED YES. WE WERE PROVIDED TAXI INSTRUCTIONS. DUE TO TASK SATURATION; BOTH THE CAPT AND I FAILED TO REALIZE THAT WE WERE NEVER HANDED OFF TO TWR AND DID NOT RECEIVE A LNDG CLRNC. IN THE FUTURE; I WILL BE MORE VIGILANT IN THIS REGARD.