  The Anderson transition in a 3D system with symplectic symmetry is
investigated numerically. From a one-parameter scaling analysis the critical
exponent $\nu$ of the localization length is extracted and estimated to be $\nu
= 1.3 \pm 0.2$. The level statistics at the critical point are also analyzed
and shown to be scale independent. The form of the energy level spacing
distribution $P(s)$ at the critical point is found to be different from that
for the orthogonal ensemble suggesting that the breaking of spin rotation
symmetry is relevant at the critical point.
