From the context, I think that phrase is
o(mn)iu(m) alia(rum) t(er)ra(rum) n(ost)ra(rum) - "of all our other lands"
There are various other contractions, most marked by a horizontal line above a letter or through an ascender. In this case, though, there's a special symbol for the -rum ending, also seen just before the end of the non-italic text.