Sinn Fein is insisting its revelation that it also received tapes regarding the Anglo Irish bank scandal is not intended to deflect attention from mounting pressure on party leader Gerry Adams.
Pearse Doherty, the party's finance spokesman in the Republic, told the Dail he had passed the latest batch of tapes to the Garda and the Central Bank.
The party says it cannot publish the tapes because of legal reasons, but claims the majority of the contents have not yet been put in the public domain.
It comes as Mr Adams faces continuing pressure in the aftermath of a TV documentary which featured a recording of the late former IRA commander Brendan Hughes, who accused Mr Adams of ordering the execution of Jean McConville in 1972.
Fianna Fail's Willie O'Dea criticised Mr Doherty's "amateur theatrics", and said: "It is hard to avoid the suspicion that his showmanship has more to do with Sinn Fein's attempt to distract attention from their failure, and their leader's failure, to deal with the issues raised in Monday night's programme on the Disappeared."
However, a Sinn Fein spokesman said the party did not reveal they were in possession of the tapes until they were told it was legally safe to do so.
The confirmation came on Tuesday night, allowing Mr Doherty to make a Dail statement yesterday.