  Wigner's particle classification provides for "continuous spin"
representations of the Poincar\'e group, corresponding to a class of (as yet
unobserved) massless particles. Rather than building their induced realizations
by use of "Wigner rotations" in the textbooks' way, here we exhibit a
scalar-like first-quantized form of those (bosonic) Wigner particles directly,
by combining wave equations proposed by Wigner long ago with a recent
prequantized treatment employing Poisson structures.
