  We continue the discussion of several explicit examples of generalizations in
relativistic quantum mechanics. We discussed the generalized spin-1/2 equations
for neutrinos and the spin-1 equations for photon. The equations obtained by
means of the Gersten-Sakurai method and those of Weinberg for spin-1 particles
have been mentioned. Thus, we generalized the Maxwell and Weyl equations.
Particularly, we found connections of the well-known solutions and the dark
4-spinors in the Ahluwalia-Grumiller elko model. They are also not the
eigenstates of the chirality and helicity. The equations may lead to the
dynamics which are different from those accepted at the present time. For
instance, the photon may have non-transverse components and the neutrino may be
{\it not} in the energy states and in the chirality states. The second-order
equations have been considered too. They have been obtained by the Ryder
method.
