  Using the map between free massless spinors on d+1 dimensional Minkowski
spacetime and free massive spinors on $dS_{d+1}$, we obtain the boundary term
that should be added to the standard Dirac action for spinors in the dS/CFT
correspondence. It is shown that this map can be extended only to theories with
vertex $({\bar\p}\p)^2$ but arbitrary $d\ge1$. In the case of scalar field
theories such an extension can be made only for $d=2,3,5$ with vertices
$\phi^6$, $\phi^4$ and $\phi^3$ respectively.
