  A gamma-rigid solution of the Bohr Hamiltonian for gamma = 30 degrees is
derived, its ground state band being related to the second order Casimir
operator of the Euclidean algebra E(4). Parameter-free (up to overall scale
factors) predictions for spectra and B(E2) transition rates are in close
agreement to the E(5) critical point symmetry, as well as to experimental data
in the Xe region around A=130.
