We present the explicit decomposition of the space of L(2)-sections of
vector bundles over the projective complex and quaternion hyperboloid
s. Using this we further calculate the L(2) decompostions of the metap
lectic representations for the dual pairs SL (2, R) x O (p, q), U (1,
1) x U (p: q) and O (4) x Sp (p, q) by extending the idea of plurihar
monic functions due to M. Kashiwara and M. Vergne.