We present a catalog of high-velocity clouds in the region of the Magellanic
Leading Arm. The catalog is based on neutral hydrogen (\HI) observations from
the Parkes Galactic All-Sky Survey (GASS). Excellent spectral resolution allows
clouds with narrow-line components to be resolved. The total number of detected
clouds is 419. We describe the method of cataloging and present the basic
parameters of the clouds. We discuss the general distribution of the
high-velocity clouds and classify the clouds based on their morphological type.
The presence of a significant number of head-tail clouds and their distribution
in the region is discussed in the context of Magellanic System simulations. We
suggest that ram-pressure stripping is a more important factor than tidal
forces for the morphology and formation of the Magellanic Leading Arm and that
different environmental conditions might explain the morphological difference
between the Magellanic Leading Arm and Magellanic Stream. We also discuss a
newly identified population of clouds that forms the LA IV and a new diffuse
bridge-like feature connecting the LA II and III complexes.Comment: 20 pages, 24 figures, accepted by ApJ on December 14, 201
