A Catalog of Holes and Shells in the Interstellar Medium of the LITTLE
  THINGS Dwarf Galaxies
  We present a catalog of holes and shells in the neutral atomic hydrogen (\HI)
of 41 gas-rich dwarf galaxies in LITTLE THINGS (Local Irregulars That Trace
Luminosity Extremes, The \HI Nearby Galaxy Survey). We analyzed their
properties as part of an investigation into the relation between star formation
and structures and kinematics in the \HI of small galaxies. We confirmed 306
holes between 38 pc (our resolution limit) and 2.3 kpc, with expansion
velocities up to 30 \kms. The global star formation rates measured by \Ha and
FUV emission are consistent with those estimated from the energy required to
create the cataloged holes in our sample. Although we found no obvious
correlation between global star-formation rates and the \HI surface and volume
porosities of our sample, two of the four lowest porosity galaxies and the two
highest porosity galaxies have no recent star formation as measured by \Ha and
FUV emission.
