  A dwarf nova HV Vir was observed photometrically for eight nights during the
outburst in 1992 April - May. The star showed two distinct types of periodic
variation: (1) 82.20-min (0.05708 d) double-humped variation with decaying
amplitudes during the early stage of the outburst, and (2) 83.80-min (0.05820
d) superhumps in later stages. We attributed the former to "early superhumps",
which are only seen in the earliest stage of WZ Sge-type outbursts. The
superhump period and evolution of the superhumps, together with general
characteristics of the light curve, make HV Vir a typical WZ Sge-type dwarf
nova. HV Vir also showed a large increase of the superhump period during the
superoutburst. Upon the recognition of the WZ Sge-type nature of an object
previously considered as a nova, we present a comprehensive list of candidates
for WZ Sge-type dwarf novae, and related systems.
