  We present seven nights' blue spectroscopy of the novalike variable star,
V3885 Sgr. The line spectrum shows a typical combination of broad absorption
and emission in H gamma and H beta and He I, which is associated with the
accretion disk. We also observe anti-phased narrow emission, which we attribute
to irradiation of the secondary star. The He II 4686 and N III--C III--C IV
emission lines are devoid of structure and are most likely formed in an
outflow. We measure radial velocity shifts in the absorption and emission
lines, from which we fit an orbital period of 4.97126+/-0.00036h. From the
velocity semi-amplitudes of the disk and companion star, we are able to
constrain the binary mass ratio to q>0.7.
  The phase-folded spectra provide dense coverage of the entire orbital cycle.
Doppler tomograms of the hydrogen and He I lines reveal spiral structure in the
accretion disk and the irradiated donor star. We believe this is the first
unambiguous detection of spiral waves in a novalike variable.
