Nazir

We have learnt: A NAZIRITE VOW OF UNSPECIFIED DURATION [REMAINS IN FORCE] THIRTY DAYS. Now, this fits in well enough with the view of R. Mattena, but how can it be reconciled with Bar Pada's view?  — Bar Pada will tell you that because [the period of the vow closes with] the thirtieth day, on which the nazirite polls and brings his sacrifices, [the Mishnah] says thirty [days]. We have learnt: If a man says, 'I declare myself a nazirite,' he polls on the thirty-first day.  Now, this fits in well enough with the view of R. Mattena, but how is it to be reconciled with Bar Pada's view? — Bar Pada will say: Consider the clause which follows, [viz.:] Should he poll on the thirtieth day, his obligation is fulfilled. We see, then, that the second clause [of this Mishnah] lends support to his view, whilst the original clause [must be read] as though it contained the word [I declare myself a nazirite for thirty] 'whole' [days].  Does not this second clause need to be reconciled with R. Mattena's view?  — He considers part of a day equivalent to a whole day. But have we not learnt: '[Should someone say,] "I intend to be a nazirite for thirty days," and poll on the thirtieth day, his obligation is not fulfilled'?  — [We presume that] he said, 'whole days'. We have learnt: If a man undertakes two naziriteships, he polls for the first one on the thirty-first day, and for the second on the sixty-first day.  This fits in well enough with the view of R. Mattena