  We report the discovery of (stellar) spiral-like structure in Hubble Space
Telescope images of two dwarf galaxies (GMP 3292 and GMP 3629) belonging to the
Coma cluster. GMP 3629 is the faintest such galaxy detected in a cluster
environment, and it is the first such galaxy observed in the dense Coma
cluster. The large bulge and the faintness of the broad spiral-like pattern in
GMP 3629 suggests that its disk may have been largely depleted.
  >We may therefore have found an example of the ``missing link'' in theories
of galaxy evolution which have predicted that dwarf spiral galaxies,
particularly in clusters, evolve into dwarf elliptical galaxies.
