A macro photograph of a land snail or Helix aspersa in South Florida. Land snails move by gliding along on their muscular foot, which is lubricated with mucus and covered with epithelial cilia. This motion is powered by succeeding waves of muscular contractions that move down the ventral of the foot.
Most land snails bear one or two pairs of tentacles on their heads. In most land snails the eyes are carried on the upper set of tentacles which are usually roughly 75% of the width of the eyes. The second, or lower set of tentacles act as olfactory organs. Both sets of tentacles are retractable. Photo Copyright 2008 Robert Giordano.
Descriptions from Wikipedia.