Are garden snails cannibalistic scavengers?

  There is a bike path near my home that's bordered on both sides by lush vegetation that is a habitat for hundreds of snails. One side is very sandy and full of cacti and other such plants that require little water. The other side is irrigated. Every morning, snails migrate across the concrete path toward the water, and dozens are smashed underfoot or under bicycle tires. I have noticed that at the scene of many demised shell-draggers, sometimes a live cousin can be seen camped out in pause of the journey to water works.  I never hang out long enough to examine the actual activity taking place because, well, because they do everything so slowly, but it makes me wonder if they're feeding off of the pureed carcasses?

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